Abstract:

Fluorescence reagent salicylic aldehyde thiosemicarbazone iS synthesized． is reagent can form coordiation compound with mercury， SO as to make this reagent produce fluoroscence extinction， when it iS at A ／A~=385 nm／485 nm．Making use of this reaction，the analytical method of mercury is SO set up．When the mercury content is within the range of 0—1 00 g／L，it is linear with△IF． The detectability is 0．022 g／L． erelative standard deviation detected iS 1．9％． More than 20 kinds of coexistent components have been investigated．This method has been successfully applied tO the determination of trace mercury in wastewater and sludge．

Key words: salicylic aldehyde thiosemicarbazone, mercury, fluorometric an alysis

摘要：

合成了荧光试剂水杨醛缩氨基硫脲(SHTA),该试剂与汞离子能形成配合物,从而使该试剂在λ_ex/λ_em为385nm/485nm时产生荧光熄灭。利用此配合反应建立了汞的分析方法,汞质量浓度在0～100μg/L范围内与ΔI成线性关系,检测限为0.022μg/L,测得的相对标准偏差为1.9%,考察了20余种共存组分的干扰情况。该方法成功地应用于测定污水和污泥中痕量的汞。

关键词: 水杨醛缩氨基硫脲, 汞, 荧光分析

CLC Number: 

• O657.3