Standard examination methods for drinking water—Part 1: General principles
1 Scope
This document specifies the basic principles and requirements of drinking water quality examination.
This document is applicable to the quality examination of domestic drinking water as well as source water and treated, stored and transported drinking water.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 4789.28 National food safety standard - Food microbiological examination - Quality requirements for medium and reagents
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB 15603 General rules for the hazardous chemicals warehouse storage
GB 19489 Laboratory - General requirements for biosafety
JJG 196 Working glass container
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
constant mass
mass difference of less than 0.2mg after two consecutive drying cycles, except for total dissolved solids
3.2
measure
operation of taking water samples or test solutions with measuring cylinder
3.3
pipetting
operation of taking water samples or test solutions with non-graduated pipettes, graduated pipettes or pipettors
3.4
constant volume
operation of diluting to the scale in a volumetric flask with pure water or other solvent
3.5
minimum detectable mass
minimum mass of the measured substance that can be accurately determined
Note: in mg, μg, etc.
3.6
minimum detectable mass concentration
mass concentration of the tested substance corresponding to the minimum detectable mass
Note: in mg/L, μg/L, etc.
3.7
total minimum detectable mass concentration
sum of 1/2 of the minimum detectable mass concentration for each indice with total limit
4 Examination method selection
Foreword i
Introduction iii
1 Scope
2 Normative references
3 Terms and definitions
4 Examination method selection
5 Report on test results
6 Reagent and concentration expression
7 Water used in the experiment
8 Glassware and its washing
9 Operational requirements for testing instruments and equipment
10 Laboratory safety
