Polarographic study of simazine in micellar and emulsified media

✍ Scribed by R. Gálvez; M. Pedrero; F.J. Manuel de Villena; J.M. Pingarrón; L.M. Polo

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 641 KB
• Volume: 273
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)80176-l

✦ Synopsis

A polarographlc study of the reduction of the herbicide slmazme m nucellar solutions and o&water emulsions IS reported The anionic surfactant sodmm pentanesulphonate was chosen as the most smtable agent for nucellar solutions and emulsions In rmcellar solutions two reduction peaks were observed m dtierenhal-pulse polarography (DPP) below pH 2 0, whereas only one peak was obtamed above pH 2 0 Ethyl acetate was chosen as the organic solvent to form simazme emulsions Unhke m nucellar solutions, DP polarograms of slmazme m oil-water emulstons showed only one peak even at pH values lower than 20, suggesting that pestuxde hydrolysis IS hindered m the emulslfed medium The hmltmg current is dlffuslon-controlled and the electrode process IS uxverslble The dlffuslon coefflclent of slmazme m emulsified medium was 8 85 x 10m6 cm* s-l, and the (in, and Kq values were 0 82 and 8 03 x lo-l4 cm s-* respectively Using DPP, slmszme can be determined over the concentration ranges 8 0 X lo-'-4 0 X lo-' mol I-' The hmlt of detection was 2 2 X lo-' mol I-' The effect of the presence of other herbicides belonging to the s-tnazme famdy on the slmazme reduction peak was studied The method was applied to the determmatlon of sunazme m spiked imgatlon water wth good recoveries