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Extraction flow-injection spectrophotometric determination of bismuth with lead tetramethylenedithiocarbamate

✍ Scribed by Joanna Szpunar-Łobińska

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
520 KB
Volume
251
Category
Article
ISSN
0003-2670

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✦ Synopsis

The reaction of bismuth with various dithiocarbamates was studied and an extraction spectrophotometric method for its determination using flow-injection sample processing was developed.

Bismuth was extracted on-line with a chloroform solution of lead tetramethylenedithiocarbamate (TMDTC) and the absorbance of the Bi-TMDTC complex was measured at 380 nm. The detection limit was 0.1 mg I-' and the calibration graph was linear up to 5 mg 1-l Bi. The method showed good precision and accuracy and was highly selective for Bi when EDTA and cyanide were applied as masking agents. The method was applied to the determination of bismuth in geological materials. The accuracy of the method was confirmed independently by analysing the samples by inductively coupled plasma atomic emission spectrometry.

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