利用罗丹明6G的消荧光反应测定水中微量磷
THE DETERMINATION OF PHOSPHORUS USING THE FLUORESCENCE QUENCHING OF RH6G WITH MOLYBDOPHOSPHATE
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摘要: 本文利用磷钼酸盐对罗丹明6G的荧光熄灭作用直接测定了天然水中微量磷。As(V)Ta(V)、Ga(Ⅱ)的干扰易于消除,水中其它常见离子不干扰磷的测定。本法灵敏度高,可达0.22ppb,变动系数为:1.20—4.23%,测定自来水、池塘水及温泉水中的磷均得到了满意的结果。Abstract: A method of direct fluorometric determination of phosphate in natural water is described. The method is based on a principle that molybdophosphate quenches the fluorescence of Rh6G. As(Ⅴ), Ta( Ⅴ ) and Ga(Ⅲ) interfere the determination of phosphates, but these interferents can be removed easily; other anions and cations have no influence on it.This method has a high sensitivity up to 0.22 ppb,and good reproducibility with a variation coefficient of 1,2-4,23%,
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