摘要：

合成了荧光试剂吡哆醛缩氨基硫脲，该试剂与汞离子能形成配合物，从而使该试剂在激发波长λ_ex和发射波长_em分别为380nm、485nm时产生荧光熄灭。利用此配合反应建立了汞的分析方法，汞量在0～100μg/L范围内与ΔI_F成线性关系，检测限为0.011μg/L,测得的相对标准偏差为1.35%，考察了20余种共存组分的干扰情况。该方法被成功地应用于测定污水与污泥中痕量的汞。

关键词: 吡哆醛缩氨基硫脲, 汞, 荧光分析

Abstract:

Fluorescence reagent pyridoxal- thiose micarbazone is synthesized.This reagent canformcoordiationcompound with mercury, soasto make this reagent produce fluorescenceextinction,whenit isat λ_ex=380nm,λ_em=485nm. Making use of this reaction,the analytical method of mercuryissoset up. When the ercurycontentis within the range of 0- 100μg/L, it is linear with ΔI_F. The detec tabilityis0.011μg/L. There lativest and arddeviationdetectedis1.35%. Morethan20kindsofcoexistent componentshavebeeninvestigated. Thismethodhas been successfully applied to the determination of tracemercuryin wastewater and sludge.

Key words: pyridoxal- thiosemi carbazone, mercury, fluorometri canalysis

中图分类号: 

• O657.3