Some standard content:
1CS 47.020.20
National Standard of the People's Republic of China
GB/T 4795—1999
Oil water separating equipment for machinery space bilges of Ships1999-06-11 Issued
2000-03-01 Implementation
State Administration of Quality and Technical Supervision Issued
WGB/T4795—1999
This standard is revised on GB/T4795.1~1755.4·1984 ship bilge sewage separation device with reference to the provisions of the resolution of MEIC60 (33) of the International Maritime Organization (IMO) Maritime Environment Protection Committee. The main revisions are as follows: 1) "Rated treatment capacity system" is changed to "classification". 2) "Requirements" part mainly adds full detergent adaptability and fuel release separation performance requirements for density of 0.S8.100℃: viscosity not less than 2.5×10-1m/% at 15C. The original GB4795.4 electric control box technical requirements are no longer a separate sub-standard. The content is integrated into the "Requirements" chapter of this standard. The content is based on the CL3*3250198 general technical requirements for the electrical control equipment of auxiliary machinery in ships as the technical basis.
3) The requirements and test methods for the oil content in the discharged water not exceeding 10mg/1.0 are added, and the fuel oil with a relative density of 0.98 is added as the test oil type and the test method for the sedimentation agent. 4) The inspection rules part compiles the inspection classification, which is divided into type inspection and factory inspection, and adds the judgment criteria. This standard has been implemented since the implementation of GB/T 4795.1~4795.4-1984. Appendix A of this standard This is the appendix of the standard; this standard is proposed by China State Shipbuilding Corporation. This standard is submitted by the Seventh Research Institute of China State Shipbuilding Corporation. The drafting units of this standard are: the Seventh Research Institute of China State Shipbuilding Corporation, the Ministry of Transport 1: Xie Xinban Long Distance Transportation Research Institute. The main contributors of this standard are Zhang Yongxiu, Chen Zhiyou, Wai Qiuzi, Wu Shengheng and He Yaochun. This standard was first issued in December 198.
W.1 Scope
National Standard of the People's Republic of China
Oily water separating equipment for machinery space bilges of ships
GB/T 4795—1999
Fee GT $795.1~4795,4 --1981
The water standard specifies the classification, requirements, test methods, inspection regulations, double marking, packaging, transportation and storage of marine bilge oily water separation devices (hereinafter referred to as separation devices). This standard is applicable to separation devices with a rated processing volume of 0.1~50m/h. 2 Reference standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All parts of the standards are subject to revision. All parties using this standard should explore the possibility of using the latest version of the following standards, GB19:—1990 Pictorial marking of packaging, storage and transportation
GB/T 569--1963 Marine flange connection dimensions and sealing surfaces GB/T2501--1989 Marine method total connection dimensions and sealing surfaces (four-digit) CB3250-1985 General technical conditions for electrical control equipment of ship auxiliary machinery CB/T3859-1999 Technical conditions for tubular electric heaters for marine oil-water separation devices 3 Definitions
This standard adopts the following definitions.
Isokinetic sampling Isokinetic sampling means that the sample enters the sampling tube at the average flow rate of the outlet pipe. Sampling can be achieved by digging and sampling time meters, and the sampling time is calculated according to (1).
In the formula: 1 Sampling time.s;
V-· Sample volume.mL
Q—Flow rate in the device water pipe.mL/st
Radius of the installation water pipe + cml
Inner radius of the sampling tube, r=0. 3 cms
4 Classification
4.1 Type
According to the separation method, the separation device can be divided into gravity type, agglomeration type and other types. 4.2 Main parameters
The rated processing capacity of the separation device shall comply with the provisions of Table 1, approved by the State Administration of Quality and Technical Supervision on June 11, 1999 (1)
2000-03-01 implementation
W.bzsoso:com0.10
4.3 Model
The model group or regulations of the separation device are as follows: JO0
CB/T 4795
Rated processing capacity
1 Electrolysis type, excitation bacteria type, mixed type, chemical method, etc. are all other types. ? The names in brackets are replaced by numbers. 4.4 Marking examples
a) The processing capacity is 2m/h and the force separation device is marked as: separation device YSF-Z-2GR/T4795--1999 1s) The processing capacity is 0.5 m/h and the coalescence separation device is marked as: separation device YSF-J-0, 5 G13/T 4795—1999 c) The processing capacity is 5 m*/h and the other separation device is marked as: separation device YSF Q-5 GB/T 4795—19995 Requirements
5.1 External
5. 1.1 The surface of the separation capsule should be smooth and evenly coated. 5. 1. 2 The outlet pipeline of the separation device should be designed and regulated. 3. 0
Processing capacity. m\/lh
[z-—yi
Separation method code] - affinity type
lQ-other
Oil-water separation device
(ZYF.. Zhennai oil-water separation device)
each name+(CYF
5. 1.3 The design of the separation equipment should be beautiful, the layout should be reasonable, and it should be easy to operate and maintain. 5.2 Structure
Lubricant sewage separation equipment (oil-water separation equipment)
Oil-water separation equipment (oil-water separation device)
The separation device referred to in this standard is composed of oil-water separator, supporting pump and electrical control box and other main parts, m'/h
5.2.1 The supporting pump of the separation device should be positive displacement type. Under the specified working conditions, the discharge pressure should not be lower than the rated pressure of the separation device, but not more than 10% of the rated pressure.
5.2.2 The strength of the separation device's container should be able to withstand 1.5 times the design pressure without structural damage and long-term deformation. 5.2.3 The tightness of the separation device after assembly should be able to withstand 1.25 times the design pressure, and each component should be free of leakage. 5.2.4 The oil separation components in the separation device shall not have obvious swelling, disengagement and corrosion after being inspected in the following items and water: 2
W.GB/T 4795- 1999
a) Relative density of 0.94 at 15℃, of which viscosity at 100℃ is not less than 1.7×10-m/g (viscosity at 37.8℃ is not less than 2.2×10-n/s). Or fuel oil with relative density of 0.98 at 15℃, of which viscosity at 100℃ is not less than 2.5×10*m/s (viscosity at 37.8℃ is not less than 4.4×104m/s); h) Light oil with relative density of 0.3 at 15℃ c) Water with relative density of 1.0.15 at 15℃ and water with relative density of 1.02 at 15℃ 5.2.5 The electric control box shall have at least the functions of pump start, stop, and charging. Thermal control, oil discharge control storage and other kinetic energy. If the separation device is equipped with a monitoring device for the oil content of the discharged water, the electric control box should have the function of stopping the discharge of oil content in excess of the standard or controlling the discharge of the tank bottom. 5.2.5 The electric control box of the separation device should comply with the relevant requirements of CB*3250. 5.2.7 The separation device should be equipped with an automatic drainage system. For the separation device with stage treatment, except for the first stage, all subsequent stages can be manually drained, but they must have the oil-water interface monitoring and alarm function. At the same time as the oil-water interface sensor of the basic system, a probe plug or oil-water interface observer is provided in a horizontal position.
5.2.8 The heating and drainage automatic control part of the separation device should be able to be converted to manual control. 5.2. 9 The separation device should be able to operate normally for 24 hours at rated processing capacity even if no one is watching over it. 5.2.10 The suction pipe of the pump supporting the separation device should be equipped with a device that can remove impurities from the food. 5.2.11 In order to achieve sampling of equal motion, the vertical part of the inlet and outlet of the separation device should be equipped with a sampling device that meets the requirements of Figure 1. 1 Sampling device diagram
5.2.12 When the separation device is equipped with an overheater, it should have an overheat protection function 5.2.13 The connection dimensions of the external flange of the separation device shall comply with the relevant provisions of GB/T569 or GB/T2501. 5.2.14 The safety or other pressure protection devices of the separation device shall be able to operate when the start-up pressure is 1.D5 times the maximum working pressure. 5.2.15 The electric heater used in the separation device shall comply with the relevant provisions of CB/T3869. 5.3 Performance
5.3.1 At rated processing capacity, the oil content of the discharged water after treatment by the separation device shall not exceed 15mg/l. 5.3.2 The separation device shall be able to separate light oil with a relative density of 0.83 at 15°C to fuel oil with a relative density of 0.94. The viscosity of the fuel pool within the range of use shall not be less than 7.7×10m/s at 100°C (the viscosity shall not be less than +2.2×10°/s at 37.8°C). The separation device shall also be able to separate light oil with a relative density of 0.83 at 15°C to fuel oil with a relative density of 0.98. For fuel oils within the range of fuel oil, the viscosity of the fuel when washed with 100% oil shall not be less than 2.5×10m5 (the viscosity shall not be less than 4.4×10m/ at 37.8°C). 5.3.3 The separation device shall be able to separate oil and water with a high oil content of 0-100%, and when the supply of the separation device changes from oil-containing material to oil or from air to air or from water to air, the oil content of the non-water outlet shall not exceed 15mg/1 and shall be able to be affected by at least one cleaning judgment.
a) The separation device shall be able to separate an oil-water mixture with an oil content of 0.5%~1.0% and a relative density of 0.83 at 13°C; 6) The separation device shall be able to separate an oil-water mixture with a relative density of 0.83 at 15°C and a relative density of 25%. c) The separation device can separate an oil-water mixture with a relative density of 0. d) The separation device should be able to separate the relative density of G.94 or 0.98 at 15 °C and the oil content of 0.5% to 1.5% of the water-based liquid: W.GB/T 4795 -.. 1999
e) The separation device should be able to separate the relative density of 0.94 or 0.98 at 15 °C and the oil content of 0.5% to 1.5% of the water-based liquid: W.GB/T 4795 -.. 1999
e) The separation device should be able to separate the relative density of 0.94 or 0.98 at 15 °C The oil content is recorded as 25% of the oil-water mixture; the separation device should be able to separate the oil with a relative density of 0.94 or 0.98 at 15°C and an oil content of 100%; the separation device should be able to separate the oil-water mixture containing cleaning agent, and the weight ratio of cleaning agent, oil (relative density at 15°C not less than 0.83), and water (relative density at 15°C not less than 1.01.5) is 110:100. 5.3.4 Under the working conditions in Table 2, the released water content after the separation device is treated should not exceed 15mg. 2
Rated load
6 Test method
6.1 Performance test
6.1.1 Test system
Discharge hydraulic pressure
6.1.1.1 The test system shall include a water tank, oil storage tank, oil return tank, oil-water cleaning agent mixing fence, pipes, sampling cover, drainage viewing window, air suction valve, flow meter, pressure gauge, thermometer, valve, etc. See Figures 2 to 5 for the test system diagram. 61.1.2 For the test, the oil-water mixture can be directly supplied by the special matching pump of the separation device. If a special matching pump is not available, a centrifugal pump with a speed of more than 1000r/min must be used to supply the oil-water mixture. The output of this centrifugal pump shall not be less than 1.5 times the rated processing volume of the separation device under the rated working pressure of the separation device. The excess output can be eliminated by a bypass pipe. 6.1.1.3 The liquid flow rate of the pipeline in front of the separation device is 1 to 3m/s. Its Reynolds coefficient calculated with fresh water should be greater than 10,000, and the length of the pipeline from the oil injection port to the separation device should not be less than 20 times its diameter. In addition to the filter of the separation device itself, no other filter shall be installed on the pipeline between the system outlet and the separation device. 6.1.1.4 Sampling points shall be set up on the vertical pipelines of the separation device inlet and the water selection, and the sampling device shall be set up according to Figure 1. 6.1.1.5 An observation window should be installed on the auxiliary water pipe E. 6.1.1.6 1. Air suction valve should be installed in the pump suction pipe, and it can effectively suck air. Heating device should be installed in the test cabinet and small cabinet. 6.1.1.7
Pressure over
) Selection point
Gas gas meter
(connection)
Pressure gauge
Flow meter
Detailed point
Sampling Yan
2 Test system diagram of special matching pump
Return to protection
W. Water tank
Flow meter
Shanshui tour courtyard
Agent energy cabinet
Oil and water cleaning
Agent mud cabinet
GB/T4795 -. 1999
Observation window
Air flow meter
Open flow meter
8 Sampling point
Sampling point
3 Test system diagram of centrifugal pump
(Observation window
? Sampling point
Self-flow meter
Positive force in
[Return oil
No oil cabinet
Hudufei
Sampling point
Figure 4 Cleaning agent test system with special matching pump Pressure gauge
Observation window
Sampling point
Flow most in
Bypass road
Business system
Sampling point
Figure 5 Cleaning agent test system using centrifugal pump 6.1.1.8 The flowmeter and adjustment threshold of oil and water should be set on the liquid supply pipeline respectively. The accuracy of the flowmeter should not be lower than 1.5 level. 5
W.GB/T 4795 1999
6.1.1.9 Pressure gauges should be set on the liquid supply pipeline and the drainage pipeline of the separation device. The static of the positive pressure gauge should not be lower than 1.5 level. 6.1.1.10 Thermometers should be set on the liquid supply pipelines. The precision of the thermometers should not be lower than 1.5 level. 6.1.2 Test system
6.1. 2.1 The test is completed using the following two grades of oil: 1) fuel oil (test oil A), whose relative density at 15°C is not less than 0.94 and whose viscosity at 100°C is not less than 1.7×10*m/s (viscosity at 37.8°C is 2.2×101m/s); 2) light oil (test oil B), whose relative density at 15°C is not less than 0.83 and whose viscosity at 100°C is not less than 2.5×10-1m/s (viscosity at 37.8°C is 4.4×10-1m/s); 3) fuel oil (test oil C), whose relative density at 15°C is not less than 1.98 and whose viscosity at 100°C is not less than 2.5×10-1m/s (viscosity at 37.8°C is 4.4×10-1m/s); 4) light oil (test oil B), whose relative density at 15°C is not less than 0.83 and whose viscosity at 15°C is not less than 0.83. 6.1.2.2 The filtered water used in the test shall have a relative density of not more than 1.015 at 15°C. 6.1.2.3 Before the start of the test, the filter water shall be filtered according to 6. 1.2.1, 6.1.2.2, the density and water content of fuel oil shall be measured. 6.1.2.4 During the test, the temperature of the oil-water mixture input into the separation device shall be heated to the temperature specified by the separation device. 6.1.2.5 During the entire test period, no interruption, maintenance or replacement of manual parts shall be allowed. 6.1.2.6 The water-oil mixture input into the separation device shall not be diluted during the treatment process. 6.1.2.7 The oil-water ratio input into the separation device shall be measured by a flow meter. At the same time, the mixed liquid is placed into a sampler from the sampling point on the liquid supply pipeline in front of the separation device. After standing for a while, the water ratio is checked. 6.1.2.8 During the whole test process, the discharge water pressure of the separation device with a rated processing capacity of not less than 1 m/h must be greater than C.12MPa, and the discharge water pressure of the separation tray with a rated processing capacity of less than 1m/h must be greater than 0.07MPa. 6.1.2.9 Before each sampling, the sampling cock should be opened and drained for more than 1 min, and the sample should be taken after heating. 6.1.2.10 The plate containing the sample should be sealed and marked at the time of change, and analyzed by the unit designated by the testing agency.
6.1.2.11 The requirements and storage method of the sample bottle shall be in accordance with the provisions of 6.8.2.1. 6.1.3 Test sequence
The test sequence of the separation device is shown in Figure 6. In the tests specified in 6.1.3.1 to 6.1.3.6, the separation device should meet the requirement of not more than 15m/1 before the water is filled. Start the pump to supply water to the separation device. After each chamber is filled with water, determine the water supply volume. Use the fuel oil specified in 6.1.2.1a) or 6.1.2.1b) to continuously carry out the tests specified in 6.1.3.1 to 6.1.3.6. The sampling frequency is 25%.Separation volume, m
Rated treatment capacity of separation device Ω.m/h.
Dynamic drainage test
12×15
Figure 6 Separation equipment and test procedure diagram
6.1.3.1 Input 10% test oil B into the separation device for 5 TTin. 6.1.3.2 Input oil-water mixture with oil content of 0.5%~1.0% into the separation device to make it reach a stable state. The steady state refers to the state formed after the oil-water mixture passes through the separation device and is not less than 2% of the separation device volume. Then test in this state for 30 min + 6 min. At the 1st and 2nd min, samples are taken from the sampling points of the separation device inlet and outlet respectively (test at the bottom). At the 30th min, samples are taken from the inlet and outlet at the same time. During the 30th min, the air inlet at the suction end of the system should be closed slowly. When the liquid in the supply pipeline stops flowing, samples are taken at the discharge. The oil content of the discharged water after treatment should not exceed 15 m. 6.1.3.3 The tidal water with a volume of 25 m2 is supplied to the separation device according to the contract and 6.1.3.2 The test is carried out in accordance with the prescribed procedure: the oil content of the discharged water after treatment should not exceed 15 mg/l. 6.1.3.4 100% oil is supplied to the separation device, and the chamber is automatically opened during the expansion period. The 100% oil test is continued for at least 5 minutes. 6.1.3.5 1% fresh water is supplied to the separation device for 15 minutes. After 10 minutes of water supply, samples are taken from the drainage. 5.1.3.6 The water supply of the separation device is gradually changed to a mixed liquid with a pumping volume of 25% ± 5% oil, and then gradually changed to 0% fresh water. It is replaced every 15 minutes for at least 3 hours. When the flushing liquid with an oil content of at least 25% ± 2% is supplied, the flushing liquid is supplied from the drainage port.
6.1.3.7 The separation device is filled with clean water and the test set in 6.1.2.1 is repeated with A and C. 2 and 6.1.3.3 test: the water content after treatment should not exceed 1 mg/L. 6.1.3.8 The selection of cleaning agent for separation equipment should be recorded in the type certificate. If the separation equipment can be used with various cleaning agents, the cleaning agent shall be selected by the competent inspection authority for testing. The test method is as follows: a) In the oil-cement mixture containing cleaning agent, the weight ratio of light oil (15 (density not less than 6.83) and water (15 (density not less than 6.015) is 110:100; b) The cabinet containing the cleaning water mixture should meet the needs of continuous testing, and the mixture should be stirred, and the stirring degree should be 7-10 T/mm. wwW.bzxz.Net
During the test, firstly, the oil-water mixture containing lubricant is input into the separation device to make it reach the stable state specified in 6.2.3.2, and then samples are taken 3 times. The sampling interval is 20 minutes. The separation device should meet the requirement that the oil content of the discharged water does not exceed 15 mg/L. 6.1.4 Or the test report, etc. The test party shall report the following data in international units: a) The following properties of oil: b) Relative density of water at 15°C: 0.1-1.2 Viscosity (00°C/37.acm*/s); c) Relative density of water at 15°C and the presence of certain solid substances: d) Name of the cleaning agent, specification, brand, etc. 3) Liquid overflow of the separation device: 4) Analytical methods used for all samples and their results, as well as the number of analytical concentration meters (if analytical concentration meters are available); 5) Test system diagram and sample installation diagram; 6.2 Appearance quality inspection: Use thermal and colorimetric separation devices to measure the surface. The coating and pipeline settings should meet the requirements of Section 5.1. 5.3 Safety valve action test
Start the valve, adjust the outlet pressure to the preset action low, and check the safety valve tripping condition. The result should meet the requirements of 5.2.14.
6.4 Strength test of receiving vessel
Put water with 1.5 times the design pressure into the receiving vessel and keep the pressure for 5 min. The result should meet the requirements of 5.2.2: 6.5 Separation test
Put water with 1.25 times the design pressure into the separation device and keep the pressure for 5 min. The result should meet the requirements of 5.2.3. 6.6 Electric control model test
WGB/T 4795-1999
The electric control box shall be tested according to the requirements of CB*3250, and the results shall meet the requirements of 5.2.6.6.7 End oil element immersion test
The oil filter element in the separation device shall be heated and immersed in the oil and water listed in Table 3 respectively, and the results shall meet the requirements of 5.2.4. Table 3 Fuel oil Bubble time Bubble temperature At 15°C, the relative density is not less than 0.91, and the viscosity at 100°C is not less than 1.7×10-1 m*/s. (The viscosity at 37.8°C is 2.2 (The viscosity at 37.8°C is 4. 4X10-^m/s
Not less than 55
6.8 Oil content analysis method
X10-tm*/s
Not less than 65
Relative density at 15℃ is not less than 0.83
Not less than 35. Without heater
The temperature is not more than 30
The temperature is not more than 1,n15
This method uses carbon tetrachloride benzene to extract the oil in the test sample. The oil content of the sample is determined by comparing the infrared absorption of the sample benzene solution with the standard solution of known concentration. Other suitable non-infrared active solvents can also be used. 6.8.1 Application scope
6. 6.1. 1 This method is suitable for the measurement of most distillate oils, even if some volatile components are lost when the benzene sample is extracted. 6. 8. 1.2 The measuring range of this method is 2 ~ 80 mg / L. When using a colorimetric blood with a long optical path, the minimum liquid concentration of the test can reach 0.1 mg / L. The detection range can be extended to 1000 mg / L by diluting the sample. 6.8.2 Collection and storage of samples
6.8.2.1 Collect 1000 ml or 500 ml of representative samples in a narrow-necked glass bottle with a sealed lid or a liquid separatory funnel, label it, and analyze it within 24 hours. If the sample is not analyzed within 24 hours after collection, 5 μL of saline must be added to the sample and stored at 4 ° C. The storage period shall not exceed 7 days. 6.8. 2.2 To avoid the loss of oily substances in the sampling equipment, the samples collected at the specified time intervals must be stored and analyzed separately to obtain the average concentration in a continuous period. 6.8.3 Instruments
) Infrared spectrophotometer or non-dispersive infrared analyzer h) Separating funnel, 1000 mL or 500 mL (the stopcock cannot be coated with Vaseline); ) Volumetric syringe, 1000mL500mL
d) Syringe, 20 ml.;
e) Stainless steel needle:
f) Colorimetric blood, sodium fluoride or infrared quartz colorimetric blood with a minimum transmittance of 80% for light waves with a wavelength of 3.4 μm (wave number 2930 cm-1) and an optical path length of 5 mm as the standard test container: according to the need, it can also be called a colorimetric blood with a longer optical path; g) Filter paper, medium speed, diameter 12.5 cm: 6.8.4 Reagents
a) Hydrochloric acid (HC1) 11, equal amounts of analytical grade concentrated hydrochloric acid and distilled water are mixed: b) Sodium chloride (NaCl), analytical grade;
W.GB/T 4795-1999
c) Carbon tetrachloride (tl,, analytical grade or equivalent fluorocarbon reagent td) Standard oil: Oil taken from the source at the same time as sampling: e) Standard stock solution: Accurately weigh 0.30g of oil into a 100mL volumetric flask and dilute to 100ml with carbon tetrachloride. 6.8.5 Preparation of standard line
Use a pipette to pipette into the standard stock solution 5.10.15, 20 or 25mL into a 100mL volumetric flask, dilute to 100mL with carbon tetrafluoride, volume,Prepare a series of standard solutions, the concentration of which is expressed as milligrams of oil per 100 ml of solution. Scan this series of standard solutions at the wave number of 3200 cm- to 2700 cm-^, and draw a standard curve based on the net absorbance of the series of standard solutions and the oil concentration. If a non-dispersive multi-analyzer is used, draw a standard curve based on the oil concentration and the corresponding reading of the instrument. 6.8.6 Operation steps
6. 8. 6. 1
a) For samples that have not been acidified, add 5mL of hydrochloric acid to the sample bottle. After mixing, use pH test paper to check the pH value of the sample. It should be below 2, otherwise hydrochloric acid should be added to adjust the pH value. b) 1000mL or 500ml of sample is placed in a 1000ml or 500ml separatory funnel and add 5g of sodium chloride. c) Pour 48mL or 23mL of carbon nitride into the sample bottle, cover the sample bottle tightly, shake the inside and cover of the rinse plate, transfer the rinse liquid to the separatory funnel containing the solution, swirl for a few minutes, and let it stand to separate. d) After absorbing the water in the discharge tube of the separatory funnel with filter paper folded into a long strip, drain the lower layer (carbon nitride layer) into a 100mL or 50mL container through a filter paper moistened with carbon nitride. e) Repeat the steps specified in 6.8.6.1 c) and 6.8.6.1 d). Transfer the whole extract to the volume of 6.8.6.1 d), top of the separatory funnel, rinse the filter paper and funnel with 4ml of carbon tetrachloride, and adjust the extraction volume to 100ml or 50ml, cover the volumetric flask and mix thoroughly.
g) Transfer the water remaining in the separatory funnel to a 1000ml or 500ml volumetric flask, and measure the volume of the sample water (acid-free volume) with an accuracy of 5ml.
6.8.6.2 Content Analysis
a) Prepare the infrared spectrophotometer or non-dispersive infrared analyzer according to the instrument manual. b) Rinse the colorimetric blood twice with the prepared extract to be tested, and then fill it with the extract wave. c) Scan the sample at 32G0cm to 2700cm- with the same measurement conditions as the standard line. d) As shown in the figure, a straight baseline is drawn below the micro-spectral band. If the scanned numbers are recorded on the absorbance recording spot, read the maximum peak value of the absorbance at a wavelength of 3.4 μm (wave number 2930 cm5), and subtract the absorbance of the baseline at this point to obtain the net absorbance value. If the scanned numbers are recorded on the transmittance recording paper, the net absorbance value is calculated according to formula (2): Where: A——net absorbance value, dB
T—transmittance on the baseline, %,
T—maximum transmittance, %,
(2)
) If the net absorbance of the sample to be measured exceeds 9.8 or exceeds the linear range determined by the standard curve, pipette an appropriate amount of the extract into a volumetric flask and dilute to the scale line of the volumetric flask; if the absorbance is less than 0.1, a colorimetric blood with a longer optical path length is required to repeat the scan in 6.8.5, 2c).
6.8.7 Analytical quality control
As a control quality, the reagent blank shall be carried out at the same time as the sample analysis. When carrying out the type approval test, the analytical method shall be evaluated according to Appendix A (standard agglomeration). 6.88 Calculation
6.8.8.1 Calculate the number of grams of oil in each 100 ml of the technical solution or dilution using the standard curve. 6.8.B.2 Use formula (3) to calculate the oil content of the sample W.bzsoso.cOm: (- oil content of sample, ng/ml
GB/T47951999
C = RXDX100?
R----100 ml. oil content in the liquid (determined from the standard curve) ng/100 ml.; extraction according to the dilution number (according to bi.8.6.2 e)); - sample volume, ml (1 6.8.6.1 g) measured value).
Figure 7 Construction of the baseline
6.8.8.3 For the calculated value less than 100 mg/L, take two significant figures. 7 Inspection rules
Inspection is divided into type inspection and output inspection! "Inspection, 7.1 Type inspection
7. 1. 1L In any of the following cases, type inspection shall be carried out: a! When applying for national type approval certificate:
b] First-made products, including converted products;! When the product performance is affected by changes in product structure, process and materials; d);
! When the national competent inspection agency makes a request. 7. 1.2 Type inspection items shall be in accordance with Table 4. Breaking (em
W.1L Type inspection shall be carried out in any of the following cases: a! When applying for national type approval certificate:
b] First-time products, including converted products;! When the product performance is affected by changes in product structure, process and materials;
! When the national competent inspection agency makes a request. 7. 1.2 Type inspection items shall be in accordance with Table 4. Breaking (em
W.1L Type inspection shall be carried out in any of the following cases: a! When applying for national type approval certificate:
b] First-time products, including converted products;! When the product performance is affected by changes in product structure, process and materials;
! When the national competent inspection agency makes a request. 7. 1.2 Type inspection items shall be in accordance with Table 4. Breaking (em
W.
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