BS 6068-2.49:1995 Water quality. Part 2. Physical, chemical and biochemical methods - Section 2.49 Determination of aluminium. Spectrometric method using pyrocatechol violet
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1.1 Type of sample
The method is applicable to the analysis of potable
waters, ground waters, and lightly polluted surface
and sea waters.
1.2 Substance determined
The method determines filterable (dissolved) and
acid-soluble aluminium.
1.3 Range
The method includes low range determination up to
100 µg/l Al with 50 mm cells and high range determi-
nation up to 500 µg/l Al with 10 mm cells. The effec-
tive range depends on the sensitivity of the
spectrometer and can be extended upwards by taking
smaller test portions.
1.4 Limit of detection
The limit of detection is 2 µg/l when cells of optical
path length 50 mm and a 25 ml test portion are used.
1.5 Sensitivity
An aluminium concentration of 100 µg/l gives an
absorbance of about 0,20 ± 0,05 optical absorption
units, using a 25 ml test portion and cells of optical
path length 10 mm.
1.6 Precision
If not specified, the precision of volumes and masses
mentioned in this International Standard is ± 1% of
the value.
ICS 13.060.50 Examination of water for chemical substances
Language:
English
Subject Keywords:
Interferences (chemical); Reproducibility; Water; Test equipment; Colorimetry; Calibration; Samples; Chemical analysis and testing; Water testing; Spectrophotometry; Quality; Aluminium; Reports; Quantitative analysis; Determination of content
BS 6068-2.49:1995 Water quality. Part 2. Physical, chemical and biochemical methods - Section 2.49 Determination of aluminium. Spectrometric method using pyrocatechol violet
