GB/T 33686-2017General rules for analytical and testing methods of coal mine water (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Application Scope

This Standard specifies the general rules, sample, determination, solutions and their concentration, expression of results, accuracy of method, test record and test report of analysis and testing of coal mine water.

This Standard applies to the analysis and testing of coal mine water.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this Part.

GB/T 601, Chemical Reagent - Preparations of Standard Volumetric Solutions

GB 3100, The International System of Units and Its Application

GB/T 3101, General Principles Concerning Quantities, Units and Symbols

GB 3102 (all parts), Quantities and Units

GB/T 6379.2, Accuracy (Trueness and Precision) of Measurement Methods and Results - Part 2. Basic Method for the Determination of Repeatability and Reproducibility of a Standard Measurement Method

GB/T 6682, Water for Analytical Laboratory Use - Specification and Test Methods

GB/T 8170, Rules of Rounding off for Numerical Values and Expression and Judgement of Limiting Values

GB/T 8538, Methods for Examination of Drinking Natural Mineral Water

3 General Rules

3.1 The analytical methods listed in the analytical standard of coal mine water may be used in arbitration analysis, validation of other analytical methods, standard substance fixed value analysis and routine analysis.

5 Determination

6 Solutions and Their Concentrations

6.1 Unless specified otherwise, the water used in the preparation of solutions and process of analysis shall be grade-3 water specified in GB/T 6682.

6.2 All solutions using water as solvents are water solutions, usually abbreviation solutions; solution using other liquids as solvents shall be named with the name of solvents in front.

6.3 The frequently-used solution concentrations in standards are expressed as follows.

a) the mass concentration of substance B. the mass of substance B divided by the total volume of mixture. It is usually expressed in g/L, mg/L, mg/mL, µg/mL and ng/mL;

b) the amount-of-substance concentration of substance B or the concentration of substance B. the amount-of-substance of substance B divided by the total volume of mixture. It is usually expressed in mol/L and mmol/L. The basic element form of solute shall be indicated in actual applications;

c) the mass fraction of substance B. the ratio of the mass of solute to the mass of solution (solute + solvent), i.e. the ratio of the mass of substance B to the mass of mixture, which is usually expressed in %, 10-2, 10-4, 10-6 and 10-9;

d) the mass ratio. the ratio of two masses of a certain constituent in the mixtures. It is expressed by "m1 + m2", i.e. the reagents of mass m1 and mass m2 mixed up;

e) the volume fraction of substance B. the ratio of the volumes of pure substance B and mixture under the same temperature and pressure, which is usually expressed in mL/L or its fraction or multiple;

f) the volume ratio. the ratio of liquid reagent to solvent. It is expressed by "V1 + V2", i.e. the certain solution of volume V1 added to the solvent of volume V2.

6.4 The conversion factors in the method standard and the concentrations of standard solutions shall be rounded off to four significant digits.

6.5 The calibration of solutions shall be as specified in GB/T 601.

a) test item name, record form management number, marking of page number and total pages number;

b) test date;

c) test standard or method, and name and number of main apparatus used;

d) sample number in laboratory;

e) sample pretreatment (if necessary);

f) test data;

g) test result and calculation;

h) environmental conditions for test;

i) tester and reviewer;

j) other issues that need to be addressed or content that needs to be added (if necessary).

9 Test Record and Test Report