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Database: 189759 (26 Oct 2025)
GB/T 11891-1989 English PDF
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GB/T 11891-1989
: Water quality. Determination of kjeldahl nitrogen
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GB/T 11891-1989
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Water quality. Determination of kjeldahl nitrogen
GB/T 11891-1989
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Basic data
Standard ID
GB/T 11891-1989 (GB/T11891-1989)
Description (Translated English)
Water quality. Determination of kjeldahl nitrogen
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
Z16
Classification of International Standard
13.060.40
Word Count Estimation
5,556
Date of Issue
11/3/1989
Date of Implementation
7/1/1990
Adopted Standard
ISO 5663-1984, NEQ
Issuing agency(ies)
State Bureau of Technical Supervision
Summary
This standard applies to the determination of industrial waste water, lakes, reservoirs, and other contaminated water Kjeldahl nitrogen. Kjeldahl nitrogen content is low, get more samples, after digestion and distillation, and finally to spectrophotometric determination of ammonia. At higher levels, get a small sample, and finally to the acid titration ammonia.
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