HG/T 3610-2000 Analysis Methods and Rules for Fouling and Corrosion Products in Industrial Circulating Cooling Water HG/T3610-2000 Standard Download Decompression Password: www.bzxz.net

Record number: 72592000
HG/T 3610 2000
In the process of industrial circulating cooling water treatment, the analysis of fouling and corrosion products has important guiding significance for determining how to carry out cleaning, water quality treatment and equipment maintenance.
This standard is revised from the chemical industry standard HG/T3529--1985 "Rules for the analysis of fouling and corrosion products in industrial circulating cooling water".
The main differences between this standard and HG/T3529--1985 are: the introduction and reference standards are added.
The requirements for terminology are added.
The requirements for standard solutions are added.
"The requirements for method precision have been added. From the date of implementation of this standard, HG/T3529-1985 will be abolished. This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China and is under the jurisdiction of the Water Treatment Agent Branch of the National Chemical Standardization Technical Committee. The drafting unit of this standard is Tianjin Chemical Research and Design Institute. The main drafters of this standard are Zhu Chuanjun, Lan Chengjun, Shao Hongqian and Li Lin. This standard was first issued in 1985 as the standard HG/T5-1600-1985 issued by the Ministry of Chemical Industry. It was converted into the chemical industry standard in 1999 and renumbered. After revision in 2000, it was changed to this number. 659
Chemical Industry Standard of the People's Republic of China
Industrial Circulating Cooling Water Sludge and Corrosion
Product Analysis Method Rules
Principle for sludge and corrosion productanalytical methods of industrial circulating cooling waterG/T3610---2000
Replaces HG/T3529-1985
This standard specifies the general requirements and rules for the analysis methods of scale and corrosion products in industrial circulating cooling water. This standard is applicable to the analysis of scale and corrosion products in industrial circulating cooling water. 2. Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T601-1988 Standard for Titration Analysis (Volumetric Analysis) of Chemical Reagents Preparation of quasi-solutions GB/T602-1988 Preparation of standard solutions for determination of impurities in chemical reagents (neqISO6353-1:1982) GB/T603-1988 Preparation of preparations and products used in test methods for chemical reagents (neaIS06353-1:1982) GB3100-1993 International system of units and its application (eqvISO1000:1993) GB31011993 General principles for quantities, units and symbols (eqvISO31-0:1993) GB/T63791986 Precision of test methods Repeatability and reproducibility of standard test methods determined by inter-laboratory tests (neg 1S0 5725: 1981)
Specifications and test methods for water used in analytical laboratories (neqIS03696: 1987) GB/T6682--1992
GB/T14666-1993 Terminology of analytical chemistry
3 Requirements
3.1 Terminology
The terms used in the method shall comply with the provisions of GB/T14666. 3.2 Units and symbols
The units and symbols used in the method shall comply with the provisions of GB3100 and GB3101. 3.3 Principle and chemical reaction of the methodbzxz.net
The basic principle of the method should be briefly described, and the chemical reaction formula should be written as much as possible when necessary. 3.4 Sample and its preparation
The source of the sample and the characteristics of the sample, such as softness, hardness, color, morphology, etc., should be stated. The collected sample must be representative and uniform. Dry, grind or process the collected samples, mix them evenly, put them into wide-mouth bottles and set aside. 4 Meaning of terms in the method
4.1 Temperature
Approved by the State Administration of Petroleum and Chemical Industry on May 23, 2000660
Implementation on December 1, 2000
HG/T3610—2000
The temperatures referred to in the method are expressed in Celsius, with C after the Arabic numerals. Room temperature refers to (23±2)°C: Normal temperature refers to 15°C~~25°C.
4.2 "Heating in a water bath"
Unless otherwise specified, it means heating in a boiling water bath. 4.3 “Incineration (or drying) to constant weight”
Unless otherwise specified, it means incineration (or drying), cooling to room temperature in a desiccator and then weighing. Repeat this process until the difference between two consecutive weighings is no more than 0.0002g, which means constant weight is achieved. The last mass is used as the basis for calculation. 4.4 “Accurately weigh”, “accurately measure” and “approximately” in weighing or measuring quantities “Accurately weigh” refers to weighing to an accuracy of 0.0002g, and “accurately measure” refers to measuring volume to an accuracy of 0.02mL. When only a numerical value is written in the method, it means weighing or measuring to the last digit of this value. For example, weigh 0.4124g of sodium chloride. When the quantity expressed in the method is preceded by “approximately”, it refers to an approximate value or the amount measured by a simple measuring instrument. 5 Reagents and materials
5.1 The reagents and water used in the method, unless otherwise specified, refer to analytically pure reagents and grade 3 water specified in GB/T6682. 5.2 The standard solutions, impurity standard solutions, preparations and products required in the method, unless otherwise specified, shall be in accordance with GB/T601, Prepared in accordance with the provisions of GB/T602 and GB/T603. 5.3 When the standard solution for titration analysis (volumetric analysis) is stored at room temperature (15°C-25°C), it should generally not exceed two months. 5.4 The concentration of the standard titration solution is expressed in "mol/L", and the basic unit should be indicated. 5.5 When the solution is not indicated with which solvent it is prepared, it refers to an aqueous solution. The concentration of reagents prepared with liquid solutes is expressed as the solute volume + the solvent volume. For example: a hydrochloric acid solution of 1 + 3 refers to a mixture of 1 volume of hydrochloric acid and 3 volumes of water. 5.6 The concentration of reagents prepared with solid solutes is expressed in "g/L". 5.7 The acids or ammonia water used in the method are all concentrated acids or concentrated ammonia water if the concentration is not indicated. 6 Sample filtration
Except for those specifically specified, general filtration is based on It is necessary to choose to use express, medium speed or slow qualitative filter paper. 7 Instrument calibration
Glass measuring instruments, balances, acidity meters, spectrophotometers, conductivity meters, etc. used in the analysis need to be calibrated regularly. 8 Selection of analytical methods
If there are several analytical methods for the same measurement item, you can choose the best one according to different conditions. 9 The "blank" in the method
refers to a blank test that does not contain the substance to be tested and is carried out simultaneously with the sample analysis, and is completely consistent with the method and reagent volume used in the sample analysis.
10 Test results
10.1 Representation of results
The method of expressing the results; calculation formula and simplified formula; the meaning and unit of symbols, numbers and factors in the formula, as well as the number of significant digits should be clearly stated. 10.2 Precision
Precision should be determined in accordance with the relevant provisions of GB/T6379. Precision is expressed in terms of repeatability and reproducibility. Repeatability refers to the consistency of the results obtained when the same operator, in the same laboratory, uses the same analytical method to analyze the same sample multiple times under normal and correct analytical operations. HG/T3610
Reproducibility refers to the consistency of the results obtained when different operators, in different laboratories, use the same analytical method to analyze the same sample multiple times under normal and correct analytical operations. The repeatability and reproducibility values ​​of the method are the allowable fluctuations of the measured values, which can be expressed as the difference between the maximum and minimum allowable values. They depend on the specific method and the specific conditions of the object being measured, and are generally expressed in absolute values. 10.3 Accuracy
The accuracy of a method is the degree of closeness of each test result to the recognized standard value. It can be expressed as the difference between the maximum allowable value and the standard value and the difference between the minimum allowable value and the standard value.
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