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BS 6068-2.11:1984

BS 6068-2.11:1984

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Water quality. Physical, chemical and biochemical methods Determination of ammonium: manual spectrometric method

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

12-31-1984

Publisher

British Standards Institution

National foreword
Method
1. Scope and field of application
2. Reference
3. Principle
4. Reagents
5. Apparatus
6. Sampling and samples
7. Procedure
8. Expression of results
9. Interferences
10. Special cases
11. Notes on procedure
12. Test report
Annexes
A. The effect of other substances on pN
B. Typical absorbance values for blank and standard
    solutions
Tables
1. Volumes of standard solution for use in the
    calibration series
2. Conversion table
3. Repeatability and reproducibility standard deviations

Applicable to the determination of ammoniacal nitrogen in drinking and waste waters in the range 0.01 to l mg/l.

1.1 Substance determined

This part of ISO 7150 specifies a manual spectrometric method for the determination of ammonium in water.

NOTE An automated spectrometric method for the determination of ammonium will form the subject of ISO 7150/2.

1.2 Type of sample

The method is applicable to the analysis of potable water, and most raw and waste waters. Application to excessively coloured or saline waters shall be preceded by distillation (see clause 10). For interferences, see clause 9.

1.3 Range

An ammonium nitrogen concentration, ϱN of up to 1 mg/l, using the maximum test portion of 40 ml, can be determined. Much higher concentrations can be determined by taking smaller test portions.

1.4 Limit of detection1)

When using cells of optical path length 40 mm and a 40 ml test portion, the limit of detection lies within the range ϱN = 0,003 to 0,008 mg/l.

1.5 Sensitivity1)

Using a 40 ml test portion and a cell of optical path length 40 mm, ϱN = 0,200 mg/l gives an absorbance of about 0,69 units.

Using a 40 ml test portion and a cell of optical path length 10 mm, ϱN = 0,750 mg/l gives an absorbance of about 0,65 units.

Committee
EH/3
DevelopmentNote
Supersedes 83/51031 DC and BS 2690-7(1968) Also numbered as ISO 7150-1. (11/2003) Reviewed and Confirmed by BSI, October 2006. (09/2006)
DocumentType
Standard
Pages
12
PublisherName
British Standards Institution
Status
Current
Supersedes

BS 1427:1993 Guide to field and on-site test methods for the analysis of waters
BS 1427:2009 Guide to on-site test methods for the analysis of waters
BS 8552:2012 Sampling and monitoring of water from building services closed systems. Code of practice
12/30215289 DC : 0 BS 8552 - SAMPLING AND MONITORING OF WATER FROM BUILDING SERVICES CLOSED SYSTEMS - CODE OF PRACTICE

ISO 5664:1984 Water quality — Determination of ammonium — Distillation and titration method
BS 6068-2.7:1984 Water quality. Physical, chemical and biochemical methods Determination of ammonium: distillation and titration method

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