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  • BSI
    BS 6068-2.11:1984, ISO 7150-1:1984 Water quality. Physical, chemical and biochemical methods - Determination of ammonium: manual spectrometric method
    Edition: 1984
    $281.30
    / user per year

Description of BS 6068-2.11:1984 1984

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.



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

Standard NumberBS 6068-2.11:1984, ISO 7150-1:1984
TitleWater quality. Physical, chemical and biochemical methods - Determination of ammonium: manual spectrometric method
StatusUnder Review
Publication Date1984-12-31
ReplacesBS 2690-7:1968
DescriptorsWater, Ion-exchange methods, Seawater, Spectrophotometry, Distillation methods of analysis, Photometry (chemical analysis), Quality, Absorptiometry, Ammonia, Calibration, Determination of content, Colorimetry, Water testing, Interferences (chemical), Ammoniacal nitrogen, Sewage, Wastes, Precision, Chemical analysis and testing, Water resources, Accuracy, Ammonium inorganic compounds, Potable water, Effluents (sewage)
ICS13.060.50 Examination of water for chemical substances
CommitteeEH/3
ISBN0 580 14157 8
PublisherBSI
Pages12

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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