Flame atomic absorption spectrometric determination of lead in waste water and effluent after preconcentration using a rapid coprecipitation technique with gallium phosphate |
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Authors: | S Kagaya Y Araki K Hasegawa |
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Institution: | (1) Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University, Gofuku, Toyama 930-8555, Japan, JP |
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Abstract: | A determination method for lead in waste water and effluent was studied using flame atomic absorption spectrometry after
preconcentration of lead by the rapid coprecipitation technique with gallium phosphate. Lead ranging from 0.5 to 50 μg was
quantitatively coprecipitated with gallium phosphate from 100–150 mL sample solution (pH ∼5). The presence of gallium phosphate
did not affect the atomic absorbance of lead. Since the concentration of gallium in the final sample solution is also measurable
by flame atomic absorption spectrometry at 250.0 nm without further dilution, the rapid coprecipitation technique, which does
not require complete collection of the precipitate, becomes possible using a known amount of gallium and measuring the concentrations
of both lead and gallium in the final sample solution by flame atomic absorption spectrometry. The 32 diverse ions tested
gave no significant interferences in the lead determination. The method proposed here is rapid and has good reproducibility.
Received: 16 August 1999 / Revised: 6 October 1999 / Accepted: 14 October 1999 |
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