Abstract
Abstract Gallium(III) phosphate coprecipitates quantitatively 0.1—2.0 μg of lead(II) from 100—500 cm3 of a sample solution at pH 2.5—6.0. The coprecipitated lead(II) can be sensitively determined by electrothermal atomization atomic absorption spectrometry without any influence of gallium(III) phosphate. The calibration curve is linear from 4 to 80 ng cm−3 for lead(II). The detection limit (signal/noise = 2) is 0.095 ng cm−3 of lead(II) in 500 cm3 of the initial sample solution. Thirty-four diverse ions tested did not interfere seriously with the determination of lead(II). This method was successfully applied to the determination of lead(II) in tap and river water.
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