英文摘要 |
An electrode composed of an epoxy resin and graphite powder is fast and convenient to fabricate. The performance as a working electrode for cyclic voltammetry measurement of hexacyanoferrate(III) in aqueous and nonaqueous systems is compared with a paraffin carbon paste electrode. Well defined current-potential curves, and well linearity of current-root scan rate and current-concentration system are reported. The electroanalytical studies of the octyl methoxycinnamate, oxybenzone , benzophenone, octyl salicylate, and butyl methoxy dizenzoyl methane, that are often used as sunscreens in commercial cosmetic products, were described at the carbon-epoxy composite electrodes in nonaqueous solvent.
利用Fe(CN)63- 測試快速製備的環氧-碳改良電極的電化學性質並與碳糊電極比較其偵測性能。測試結果顯示該環氧-碳電極具有好的可逆性伏特安培關係以及電流對掃描速率1/2次方的直線性關係。甲氧肉桂酸辛酯(octyl Methoxycinnamate)、二-氫氧基, 4-氯-雙苯甲酮(Oxybenzone)、雙本甲酮(Benzophenone)、水楊酸辛基酯(octyl salicylate)及4,4' -正丁基-甲氧基二苯甲酮基甲烷(4,4'-n-Butyl Methoxy Dibenzoylmethane)是防晒化妝品重要防晒成份,我們也利用此種電極來測定這些成份在非水溶液中的電化學行為。並顯示具有好的線性檢量線。 |