【摘要】 采用热电子诱导阴极电致化学发光技术,建立了小麦粉中过氧化苯甲酰（BPO）的高灵敏度检测方法.以氧化处理的玻碳电极(C_xO_1-x)为工作电极,在电极上施加-18 k V（vs.Ag/Ag Cl）阴极脉冲电位,电子通过遂穿机制无能量损失地穿越能垒,形成热电子,而后经水合热能化作用,形成水合电子,溶液中的BPO在强还原性的水合电子作用下,生成了强氧化性自由基,生成的自由基参与了鲁米诺（Luminol）的氧化还原反应,而激发Luminol发光,从而最终实现BPO的痕量检测.线性范围为:10¹000μg/L;检出限（S/N=3）为0.7μg/L.本方法用于小麦粉中BPO分析,回收率达97.2%¹00.4%,结果令人满意.更多还原

【Abstract】 A sensitive method base on hot electron-induced cathodic electrochemiluminescence has been developed for the trace determination of benzoyl peroxide（BPO）. Under the cathodic pulse potential of -18.0 V（vs. Ag/Ag Cl）, after tunneling through the C_xO_1-x film, the hot electrons underwent a fast hydration reaction in the conduction band of water, and forming hydrated electrons partially. The hydrated electrons reacted with BPO, and the strong oxidants C₆H₅–COO^{* -} were formed. Ultimately, the cathodic ECL results from the luminol oxidized by the strong oxidants. Under the optimum conditions, the excellent linearity was observed in the range from 10–1000 μg/L. The limit of detection（S/N=3） was 0.7 μg/L. The proposed method has been applied to the analysis of BPO in flour with satisfactory results.更多还原