HG/T 2157-2011Industrial circulating cooling water - Determination of ammonium - Potentiometric method (English PDF)
工业循环冷却水中铵的测定 电位法
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
December 20, 2011
Implementation date
March 1, 1996
Scope
HG/T 2157-2011 is the English-translated version of 工业循环冷却水中铵的测定 电位法.
HG/T 2157-2011 is the recommended Chinese chemical industry standard describing the potentiometric determination of ammonium in industrial circulating cooling water. It covers the measurement of ammonium expressed as nitrogen over a range from 0 to 50 mg/L in that type of water. The method is a non-equivalent adoption of ISO 6778-1984, and reagent solutions are prepared in accordance with GB/T 603. The standard carries the Chinese classification G76 and the international classifications 13.060.25 and 71.040.40. It was issued by the Ministry of Industry and Information Technology and replaces the earlier HG/T 2157-1991 edition.
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Document preview — HG/T 2157-2011
National Standard of the People's Republic of China
- ICS
- 13.060.25
- Replacing
- HG/T 2157-1991
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- 2 Normative references
2 Normative references
HG/T 2157-2011 cites the following standards, which apply in full or in part through the references made to them in its clauses.
GB/T 603
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of HG/T 2157
| Edition | Title | Revision | Status |
|---|---|---|---|
| HG/T 2157-2011 | Industrial circulating cooling water - Determination of ammonium - Potentiometric method | current edition | Current |
| HG/T 2157-1991 | Industrial circulating cooling water - Determination of ammonium - Potentiometric method | previous edition | Superseded |
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