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Improved method for the kinetic catalytic determination of lead(II) in dodecyltrimethylammonium micelles

✍ Scribed by D. Sicilia; S. Rubio; D. Pérez-Bendito

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
745 KB
Volume
266
Category
Article
ISSN
0003-2670

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✦ Synopsis

AbStlXt

The catlomc surfactant dodecyltnmethylammomum brormde (DTAB) enhances the catalytic actMty of lead(II) on the ogdatlon of pvrOgallo1 Red (PR) by peroxodlsulphate Lead(II) accelerates this reaction by formmg a complex with PR which concentrates on the nucellar surface The nucellar catalyst of DTAB was used for the kmek spectrophotometnc determmatmn of lea&II) over the range 2-18 ng ml-' (detectlon lmut 13 ng ml-'), the relative preclslon for 10 ng ml-' of lead(H) bemg 3% The proposed method 1s highly selectwe and its analytical features are clearly supenor to those of its counterpart mvolvmg an aqueous medium The mechanism na which DTAB acts on the reaction was studied m depth

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