This standard specifies the technical requirements, test methods, inspection rules, packaging and marking of chemical reagent petroleum ether. This standard applies to the inspection of chemical reagent petroleum ether. GB/T 15894-1995 Chemical reagent petroleum ether GB/T15894-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Chemical reagent
Petroleum ether
GB/T 15894—1995
This standard is equivalent to R73\Petroleum solvent oil 40/60" in the international standard ISO6353-3—1987 "Chemical analysis reagents—Part 3: Specifications—Second batch".
This reagent is a colorless, transparent, volatile liquid with a special odor. It is extremely flammable and insoluble in water. It is miscible with ethanol, benzene, chloroform, carbon disulfide, ether and oils.
1 Subject content and scope of application
This standard specifies the technical requirements, test methods, inspection rules, packaging and marking of the chemical reagent petroleum aldehyde. This standard applies to the inspection of the chemical reagent petroleum ether. 2 Reference standards
GB/T601
GB/T602
GB/T 603
GB/T605
GB/T606
GB/T 615
GB/T619
GB/T 6682
GB/T 9723
GB/T9728
GB/T 9736
GB/T 9737
GB/T9740
HG 3—119
3 technical requirements
3.1 Boiling range (℃):
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Preparation of standard solutions for titrimetric analysis (volumetric analysis)Preparation of standard solutions for determination of impurities
Preparation of preparations and products used in test methodsGeneral method for colorimetric determination
General method for determination of water content (Karl Fischer method)General method for determination of boiling range
Sampling and testing Collection rules
Specifications and test methods for water used in analytical laboratoriesChemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
Chemical reagents
General rules for flame atomic absorption spectrometry
General method for determination of sulfate
General method for determination of acidity and alkalinity
General rules for determination of easily carbonizable substances
General method for determination of evaporation residue
Packaging and marking
Class I||tt ||Class 1
Class I·Www.bzxZ.net
3.2 Chroma: ≤10 black unit
Approved by the State Administration of Technical Supervision on December 20, 1995 30~60
?60~90,
?90~120.
Implemented on August 1, 1996
3.3 Maximum impurity content:
Evaporation residue
Water content (H, O)
Acidity (in terms of H+), mmol/100g
4 Test Method
GB/T15894—1995
Analytically pure
Sulfur compounds (measured as SO,)
Iron (Fe)
Lead (Pb)
Easily carbonizable substances
Analytically pure
The standard titration solution, impurity standard solution, preparation and products in this test method shall be prepared in accordance with the provisions of GB/T601, GB/T602 and GB/T603 unless otherwise specified. The experimental water shall meet the specifications of Grade 3 water in GB/T6682. 4.1 Boiling range determination
Determine in accordance with the provisions of Chapter 5 of GB/T615. The volume of the retained material within the specified temperature shall not be less than 90.0mL. 4.2 Chroma determination
Measure 50mL of the sample, inject it into a 100mL colorimetric tube, and determine it in accordance with the provisions of GB/T605. 4.3 Determination of impurities
The sample should be measured accurately to 0.1 mL.
4.3.1 Evaporation residue
Measure 155 mL (100 g) of the sample, place it in the evaporation blood that has been constant weight at 105±2℃, evaporate it to dryness on a water bath, and dry it in an electric oven at 105±2℃ to constant weight. The result is calculated according to the provisions of Chapter 5 of GB/T9740. 4.3.2 Moisture
Measure 15.5 mL (10 g) of the sample, use 10 mL of methanol and 10 mL of chloroform as solvent, and determine it according to the provisions of GB/T606. 4.3.3 Acidity
Measure 100 mL of carbon dioxide-free water, add 2 drops of methyl red indicator (1 g/L), and titrate with sodium hydroxide standard titration solution [c(NaOH)=0.01 mol/L] until the solution turns yellow, and maintain 305. Add 77.5mL (50g) of sample, shake in a separatory funnel for 3min, and let stand to separate the layers. Separate 50mL of aqueous phase and titrate with sodium hydroxide standard titration solution (Cc (NaOH) = 0.01mol/L) until the solution turns yellow and keep for 30s. The results are calculated according to the provisions of Chapter 7 "Water-insoluble samples" in GB/T 9736. 4.3.4 Benzene
Use a 1cm quartz absorption cell and water as a reference to determine the absorbance A of the sample at a wavelength of 255nm. The benzene content is calculated according to the following formula:
Where: X—mass percentage of benzene, %, A——absorbance of the sample;
17.6——conversion factor.
4.3.5 Sulfur compounds
Measure 3.1mL (2g) of the sample, add 50mL of potassium hydroxide-ethanol solution, and reflux for 30min. Add 50mL of water from the top of the condenser, transfer the sample solution to the evaporator, and evaporate all the organic matter in a water bath. Add 5mL of 30% hydrogen peroxide, keep warm in a water bath for 15min, neutralize with hydrochloric acid solution (20%) and add 1mL in excess, and dilute to 50 mL, and do a blank test at the same time. Take 10mL, evaporate to dryness on a water bath, add 5mL of water to dissolve the residue (filter if necessary), neutralize with sodium hydroxide solution (10g/L), dilute to 20mL, add 0.5mL of hydrochloric acid solution (20%) to acidify, and then determine according to the provisions of GB/T9728. 1156
GB/T 15894—1995
The standard is to take 10mL of blank test solution and impurity standard solution containing 0.06mg sulfate (SO.), dilute to 20mL, and treat the same volume of sample solution at the same time.
Determine according to the provisions of GB/T9723, including: 4.3.6.1 Instrument conditions
Light source: iron hollow cathode lamp;
Wavelength: 248.3nmz
Flame: acetylene-air .
4.3.6.2 Determination method
Measure 15.5mL (10g) of sample, place in evaporating blood, add 1mL sodium carbonate solution (5g/L), evaporate to dryness on a water bath, dissolve the residue in 5mL nitric acid solution (1+9), dilute to 10mL, and determine according to the provisions of Article 6.2.1 of GB/T9723. 4.3.7 Lead
Determine according to the provisions of GB/T9723, including: 4.3.7.1 Instrument conditions| |tt||Light source: lead hollow cathode lamp,
wavelength: 283.3nm;
flame: acetylene-air.
4.3.7.2 Determination method
Same as 4.3.6.2.
4.3.8 Carbonizable substances
Measure 10mL of the sample, place it in a dry colorimetric tube, add 10mL of sulfuric acid (super pure, 95.0% ± 0.5%), shake thoroughly (60~70 times/min) )20s, and place for 5min. The color of the acid layer shall not be darker than the standard color Q/8 specified in GB/T9737. 5 Inspection rules
Sampling and acceptance shall be carried out in accordance with the provisions of GB/T619. 6 Packaging and marking
6.1 Packaging
In accordance with the provisions of HG3-119, among which:
Inner packaging form: Xz-4;
Outer packaging form: W-1;
Packing unit: Class 3 and 4.
6.2 Marking
In accordance with the provisions of HG3-119, and indicate "flammable items". 1157
Additional instructions:
GB/T15894--1995
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Beijing Chemical Reagent General Factory. This standard is drafted by Tianjin Chemical Reagent Factory No. 2. The main drafter of this standard is Yan Xiaoyan.
From the date of implementation of this standard, the former Ministry of Chemical Industry Standard HG3-1003-76 "Chemical Reagent Petroleum Ether" will be invalid.
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