DETERMINATION OF MERCURY IN CONCENTRATED MINERAL ACIDS BY ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY USING GOLD AMALGAMATION

被引：22

作者：

HLADKY, Z ^{[1
]}

RISOVA, J ^{[1
]}

FISERA, M ^{[1
]}

机构：

[1] CHEM WORKS J DIMITROV, CS-83605 BRATISLAVA, CZECHOSLOVAKIA

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 1990年 / 5卷 / 08期

关键词：

MERCURY DETERMINATION; ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY; CONCENTRATED ACID; GOLD AMALGAMATION; COLD-VAPOR SEPARATION;

D O I：

10.1039/ja9900500691

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A method for the determination of trace amounts of mercury in concentrated hydrochloric, sulphuric and phosphoric acids by atomic absorption spectrometry at the p.p.b. level has been developed. After reduction of inorganic mercury compounds to mercury vapour, the vapour is transported by an inert gas from the solution and trapped on the gold coated wall of a graphite cuvette. In the second step of the determination, the absorbance signal from the atomisation of mercury released from the amalgam is measured. Peak height and area are both proportional to the mercury level between 5 and 100 p.p.b. with an RSD of up to 15%. Solutions of NaBH4 or Sn(II) were used as reducing agents.

引用

页码：691 / 692

页数：2

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