在磷酸介质中，钼（Ⅵ）催化过氧化氢氧化碘化钾，其反应产物使吖啶黄荧光猝灭，据此建立了催化荧光法测定痕量钼的新方法.方法的检出限为0.15 μg/L，线性范围 是 0.16～2.4 μg/L.20多种离子基本不干扰测定，将该方法用于茶叶，绿豆和矿泉水中钼含量 的测定，结果满意.
A new kinetic fluorimetric method was proposed for the determination of trace molybdenum. The method is based on the fluorescence quenching of acridine yellow by the reaction product of hydrogen peroxide and potassium iodide with Mo(Ⅵ) as a catalyst in phosphoric acid solution. The detection limit is 0.15 μg/L. T he linear range of determination is 0.16～2.4 μg/L.The method suffers on interf erences from more than 20 foreign ions. The method has been applied to the deter mination of trace molybdenum in tea, green bean and mineral water samples with s atisfactory results.
[1] 张文德. 催化分光光度法测定痕量钼的研究 [J]. 分析化学 1994, 22(04).
[2] 龚国权, 王流芳, 李明明. 二溴羟基苯基荧光酮荧光熄灭法测定微量钼 [J]. 分析化学 1993, 21(05).
[3] 夏心泉, 马厚蓉, 赵书林, 乃学惠, 王丽敏. 苯基荧光酮-Triton X-100荧光熄灭法测定微量钼研究 [J]. 1994.
[4] Pal B K, SINGH K A, DUTTA K. Spectrofluorimetric determination of m olybdenum in some real and enviromental samples [J]. Talanta 1992, 39(08).
[5] Masamitsu K, HIROTOSHI H, TOMIHITO K. Kinetic trace determination of molyb denum(VI), L-ascorbic acid, and thiosulfate using landolt reaction by the aid of fluorometry [J]. Bulletin of the Chemical Society of Japan 1984, 57(57).
[6] Kawakubo S, SUZUKI H, ZWATSUK M. Catalytic spectrofluorimetric de terminati on of ultrace molybdenum in natural fresh water [J]. Analytical Sciences 1996, 12(05).
