STUDIES ON THE REACTION BETWEEN CADMIUM AND POTASSIUM TETRAHYDROBORATE IN AQUEOUS-SOLUTION AND ITS APPLICATION IN ATOMIC FLUORESCENCE SPECTROMETRY

被引：114

作者：

GUO, XW

GUO, XM

机构：

[1] Northwest Geological Research Inst. of China National Nonferrous Metals Industry Corporation. No. 25, 710054 Xi'an, Xiying Road

来源：

ANALYTICA CHIMICA ACTA | 1995年 / 310卷 / 02期

关键词：

ATOMIC FLUORESCENCE SPECTROMETRY; CADMIUM; INTERMITTENT FLOW REACTOR; BIOLOGICAL SAMPLES; ENVIRONMENTAL SAMPLES;

D O I：

10.1016/0003-2670(95)00114-F

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The conditions for the vapour generation of cadmium by the reaction with potassium tetrahydroborate in aqueous solution were investigated using a programmable intermittent now reactor. It was found that thiourea together with cobalt ion greatly enhanced the generation efficiency of the volatile species. Based upon the results of the investigation, the vapour generation system was used for the determination of ultra-trace amounts of cadmium by atomic fluorescence spectrometry. A detection limit of 8 pg ml(-1) was obtained under optimized conditions and the precision of the measurements for 5 ng ml(-1) of Cd was 1.2% R.S.D. The effects of 28 diverse ions on the generation of the cadmium volatile species were investigated. Serious signal depressions were observed from copper and lead but these were decreased by using potassium cyanide as masking agent for copper and by coprecipitation with barium sulphate for lead. The method was successfully applied to the determination of cadmium in NBS standard reference material (SRM) 1577a bovine liver, NBS SRM 1645 river sediment and other Chinese origin SRMs. The method was also applied to tap water analysis with full recovery of spiked samples.

引用

页码：377 / 385

页数：9

共 9 条

[1]

Nakahara, Prog. Anal. At. Spectrosc., 6, (1983)

[2]

Cacho, Beltran, Nerin, J. Anal. Atom. Spectrom., 4, (1989)

[3]

Temperano, de la Campa, Sanz-Medel, Generation of volatile cadmium species with sodium tetrahydroborate from organized media: application to cadmium determination by inductively coupled plasma atomic emission spectrometry, Journal of Analytical Atomic Spectrometry, 8, (1993)

[4]

D'Ulivo, Chen, Determination of cadmium in aqueous samples by vapour generation with sodium tetraethylborate(III) reagent, Journal of Analytical Atomic Spectrometry, 4, (1989)

[5]

Ebdon, Goodall, Hill, Stockwell, Thompson, J. Anal. At. Spectrom., 8, (1993)

[6]

Guo, Zhang, Yang, Fan, J. Geochem. Explor., 33, (1989)

[7]

Guo, Yang, Fenxi Huaxue, 8, (1980)

[8]

Guo, Liu, Schrader, J. Anal. At. Spectrom., 7, (1992)

[9]

Guo, Guo, Progress in Analytical Chemistry, (1994)

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