化妝品中汞於電聚薄膜修飾電極的測定方法之研究   全文下載

Determination of Mercury in Cosmetics on Electropolymerized Film-modified Electrodes

分別將電極修飾劑N－乙基－N－（對羥基苯乙基）胺、對羥基苯乙基胺和三正辛基氧化膦，以0.5%Nafion或0.02%聚氯乙烯為基質，電合成薄膜修飾電極當工作電極。以陽極剝除伏安法測定化妝品中汞的含量，並採討修飾薄膜的厚度、修飾劑對基質之比值和電解液組成等重要參數。將分析結果與原子吸光法比較，發現很一致。

Electropolymerized film-electrodes modified with a film consisting of N-ethyl-N-(phydroxyphenethyl) amine, tyramine and tri-n-octylphosphine oxide, in a 0.5% Nafion or 0.02% poly(vinyl chloride) matrix were used for an anodic stripping determination of mercury in cosmetics. The most important parameters include thickness of the modifying film, the modifier-to-matrix ratio in the modifying film and the base electrolyte composition. These parameters were investigated in this study. Comparison with results obtained from atomic absorption spectrophotometric analysis (AAS) showed good agreement.