1 Scope
This technical requirement specifies the technical performance requirements and test methods for water quality automatic analyzer of ammonia based on electrode method and spectrophotometry for surface water, industrial sewage and municipal sewage, which is applicable to the development, production and performance inspection of such instruments.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.
GB 7479-87 Water quality - Determination of ammonia nitrogen - Nesster's reagent colorimetry
GB 7481-87 Water quality - Determination of ammonia nitrogen - Salicylic acid spectrophotometry
GB 7478-87 Water quality - Determination of ammonia nitrogen - Distillation and titration method
3 Terms and definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
specimen
surface water, industrial sewage and municipal sewage led into the automatic analyzer
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement range
5 Working voltage and frequency
6 Performance requirements
7 Instrument construction
8 Inspection methods
9 Marking
10 Operating instructions
11 Check
