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GB/T 11891-1989 PDF English

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GB/T 11891-1989: Water quality. Determination of kjeldahl nitrogen
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GB/T 11891-1989English179 Add to Cart 2 days [Need to translate] Water quality. Determination of kjeldahl nitrogen

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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 5,593
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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