M00001132
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ISO 17091 1st Edition, August 26, 2012 Workplace air - Determination of lithium hydroxide, sodium hydroxide, potassium hydroxide and calcium dihydroxide - Method by measurement of corresponding cations by suppressed ion chromatography
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Availability date: 07/13/2021
Description / Abstract:
This International Standard specifies a method for the
determination of the time-weighted average mass concentration of
lithium hydroxide (LiOH), sodium hydroxide (NaOH), potassium
hydroxide (KOH), and calcium dihydroxide [Ca(OH)2] in
workplace air by collection of the particulate hydroxides on a
filter and analysis of the corresponding cations using ion
chromatography.
For aerosol sampling, the method is applicable to the personal
sampling of the inhalable fraction of airborne particles, as
defined in ISO 7708, and to static (area) sampling.
The method is applicable to the determination of masses of 0,005
mg to at least 2,5 mg of lithium per sample and 0,01 mg to at least
5 mg of sodium, potassium, and calcium per sample.
The concentration range of particulate LiOH, NaOH, KOH, and
Ca(OH)2 in air for which the measuring procedure is
applicable is determined by the sampling method selected by the
user. For a 1 m3 air sample, the working range is
approximately 0,002 mg m−3 to at least 20 mg
m−3 for all four hydroxides. For a 30 l air sample, the
lower limit of the working range is approximately 0,1 mg
m−3 for all four hydroxides.
The procedure does not allow differentiation between the
hydroxides and their corresponding salts if both are present in the
air. If the cations are present alone in the form of hydroxides,
the method is specific for these basic compounds. In other
circumstances, the results obtained represent the highest
concentration of the hydroxides that could be present in the
sampled air.