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本章基于Tween-80增敏催化NaIO4氧化核固红(R)的反应,导致体系的△Ip比无Tween-80时大6.2倍,据此提出了增敏催化NaIO4氧化核固红(R)室温磷光法测定As()Ⅴ的新方法.本方法的检出限(LD)为2.6×10–15g mL–1,线性范围(0.016~1.60fg spot–1),进行7次测定,其线性回归方程为△Ip=1.876+58.464 mAs()Ⅴ(fg spot–1),n=7,相关系数(r)为0.9990,表明本方法有较高的灵敏度、精密度.同时探讨了增敏催化NaIO4氧化R室温磷光法测定As()Ⅴ的反应机理.“,”One new solid substrate room temperature phosphorimetry for the determination of As ( ) hasⅤbeen established based on the facts that Tween-80 could sensitize and catalyze the oxidation reaction between NaIO4 and nuclear fast red (R), making the Ip of the system being 6.2 times larger than that without Tween-80. The detection limit (LD) was 2.6×10-15g mL–1, wide linear range was 0.016-1.60 fg spot-1, the linear regression△equation was Ip=1.876+58.46 m As( ) ( fg spotⅤ -1, n=7) with correlation coefficient (r) of 0.9990 , indicating that this method has high sensitivity and precision. At the same time, the reaction mechanism of sensitizing and catalyzing the oxidation reaction between NaIO4 and R was also discussed.△