Coprecipitation with disulfide for the determination of traces of cobalt in water by electrothermal atomic absorption spectrometry

被引:14
作者
Hiraide, M
Chen, ZS
Kawaguchi, H
机构
[1] Dept. of Mat. Sci. and Engineering, Nagoya University
关键词
cobalt determination; coprecipitation; disulfide; ETAAS;
D O I
10.1016/0039-9140(96)01876-0
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Nanogram quantities of cobalt (II) in 200 ml of water were quantitatively collected at pH 4 on a precipitate of disulfide, which is an oxidation product of dithiol (toluene-3,4-dithiol). The precipitate was separated by filtration and dispersed homogeneously in 2 ml of 0.05 mol l(-1) nitric acid with the aid of ultrasonic irradiation. The suspension was directly analyzed for cobalt by electrothermal atomic absorption spectrometry without serious background absorption. This simple preconcentration technique allows the detection of as little as 3 ng l(-1) (50 pmol l(-1)) of cobalt in water samples. The validity of the method was evaluated by using river and seawater certified reference materials.
引用
收藏
页码:1131 / 1136
页数:6
相关论文
共 15 条
[1]   PRECONCENTRATION OF MICROAMOUNTS OF ELEMENTS IN NATURAL-WATERS WITH 8-MERCAPTOQUINOLINE AND BIS(8-QUINOLYL) DISULFIDE FOR THEIR ATOMIC-ABSORPTION DETERMINATION [J].
BANKOVSKY, YA ;
VIRCAVS, MV ;
VEVERIS, OE ;
PELNE, AR ;
VIRCAVA, DK .
TALANTA, 1987, 34 (01) :179-182
[2]  
CHEN ZS, IN PRESS MIKROCHIM A
[3]  
FRSENIUS W, 1988, WATER ANAL, P368
[4]  
GRASSHOFF K, 1976, METHODS SEAWATER ANA, P299
[5]  
GRASSHOFF K, 1903, METHODS SEAWATER ANA, P197
[6]   COPRECIPITATION WITH TIN(IV) HYDROXIDE FOLLOWED BY REMOVAL OF TIN CARRIER FOR THE DETERMINATION OF TRACE HEAVY-METALS BY GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY [J].
HIRAIDE, M ;
CHEN, ZS ;
SUGIMOTO, K ;
KAWAGUCHI, H .
ANALYTICA CHIMICA ACTA, 1995, 302 (01) :103-107
[7]   COPRECIPITATION OF TRACES OF HEAVY-METALS WITH INDIUM HYDROXIDE FOR GRAPHITE-FURNACE ATOMIC-ABSORPTION SPECTROMETRY [J].
HIRAIDE, M ;
CHEN, ZS ;
KAWAGUCHI, H .
ANALYTICAL SCIENCES, 1991, 7 (01) :65-68
[8]   ANALYTICAL-CHEMISTRY IN OCEANOGRAPHY [J].
JOHNSON, KS ;
COALE, KH ;
JANNASCH, HW .
ANALYTICAL CHEMISTRY, 1992, 64 (22) :A1065-A1075
[9]   SEPARATION OF 8 TRANSITION-ELEMENTS FROM ALKALI AND ALKALINE-EARTH ELEMENTS IN ESTUARINE AND SEAWATER WITH CHELATING RESIN AND THEIR DETERMINATION BY GRAPHITE FURNACE ATOMIC-ABSORPTION SPECTROMETRY [J].
KINGSTON, HM ;
BARNES, IL ;
BRADY, TJ ;
RAINS, TC ;
CHAMP, MA .
ANALYTICAL CHEMISTRY, 1978, 50 (14) :2064-2070
[10]   COBALT IN NORTHEAST PACIFIC WATERS [J].
KNAUER, GA ;
MARTIN, JH ;
GORDON, RM .
NATURE, 1982, 297 (5861) :49-51