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Determination of ionic alkyllead compounds in natural waters by differential-pulse anodic stripping voltammetry

✍ Scribed by Nevenka Mikac; Marko Branica

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
844 KB
Volume
264
Category
Article
ISSN
0003-2670

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✦ Synopsis

A method for the determmatlon of lomc alkyllead compounds in natural waters IS described The method IS based on the extractlon of organolead compounds m the form of dlethyldlthlocarbamate complexes mto hexane, their re-extraction with ddute mtrlc acid (pH 1 5), purlficatlon of the aqueous aadlc solution from mterfermg co-extracted drthlocarbamate and determmatlon of alkyllead species by dlfferentlal-pulse anodlc strlppmg voltammetry The Interference of morgamc lead IS prevented by copreclpltation of lead Ions with barmm sulphate Dlstnbutlons of trlalkyllead species m a water sample under condltlons for extraction were calculated from measured stab&y constants of trlalkyllead dlethyldlthmcarbamates and compared with expenmental results With 25 I of water the detectlon bmlts for dl-and tnalkyllead species are ca 0 5 ng Pb I-'

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