Amperometric Detection of Alcohols and Carbohydrates Coupled with Their Electrocatalytic Oxidation by 2,2,6,6 Tetramethylpiperidinyl-1-oxy (TEMPO).
Amperometric Detection of Alcohols and Carbohydrates Coupled with Their Electrocatalytic Oxidation by 2,2,6,6 Tetramethylpiperidinyl-1-oxy (TEMPO).
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醇类和碳水化合物的安培检测及其 2,2,6,6 四甲基哌啶基-1-氧基 (TEMPO) 的电催化氧化。
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发表时间：
1996
期刊：
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通讯作者：
H. Ohmori
中科院分区：
文献类型：
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作者：
Yuji Yamauchi;H. Maeda;H. Ohmori
研究了2，2，6，6-四甲基哌啶基-1-氧（克里思）对醇类的电催化氧化作用，并将其作为碱性条件下醇类的安培检测新工具。克里思在1-戊醇，二甘醇，和葡萄糖的存在和不存在下的循环伏安图表明，这些醇可以电化学检测的克里思的150 mM NaOH水溶液在玻碳电极的阳极响应方面。以100 μM克里思的150 mM NaOH水溶液为载液，流速为0.5 ml/min，外加电位为0.4 V（vs.饱和甘汞电极），对1-戊醇进行了流动注射分析（20 μM-1 mM）、二甘醇（5 μM-1 mM）和葡萄糖（5 μM-1 mM）。重复进样样品溶液时，已获得这些醇的重现性和稳定响应。各种醇的流动注射分析结果表明，电流检测伯醇，特别是多羟基化合物，如1，ω-二醇和碳水化合物，可以实现高灵敏度的本方法。
Application of the well-known electrocatalytic oxidation of alcohols by 2, 2, 6, 6-tetramethylpiperidinyl-1-oxy (TEMPO) as a novel tool for the amperometric detection of alcohols under basic conditions has been examined. Cyclic voltammograms of TEMPO in the absence and the presence of 1-pentanol, diethyleneglycol, and glucose demonstrated that these alcohols can electrochemically detected in terms of the anodic response of an aqueous 150 mM NaOH solution of TEMPO at a glassy carbon electrode. In flow injection analysis (FIA) utilizing an aqueous 150 mM NaOH solution of 100 μM TEMPO as a carrier solution with an applied potential of 0.4 V vs. saturated calomel electrode (SCE) and a flow rate of 0.5 ml/min, a good dependency of FIA responses upon the concentration was observed for 1-pentanol (20 μM-1 mM), diethyleneglycol (5 μM-1 mM), and glucose (5 μM-1 mM). Reproducible and stable responses have been obtained for these alcohols on repetitive injections of the sample solutions. The results on the FIAs of various alcohols have demonstrated that the amperometric detection of primary alchols and especially polyhydroxylated compounds such as 1, ω-diols and carbohydrates can be achieved with a high sensitivity by the present methodology.