DETERMINATION OF PICOMOLAR CONCENTRATIONS OF TITANIUM, GALLIUM AND INDIUM IN SEA-WATER BY INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY FOLLOWING AN 8-HYDROXYQUINOLINE CHELATING RESIN PRECONCENTRATION

被引：84
作者：
ORIANS, KJ
BOYLE, EA
机构：
[1] MIT,DEPT EARTH ATMOSPHER & PLANETARY SCI,CAMBRIDGE,MA 02139
[2] UNIV BRITISH COLUMBIA,DEPT CHEM,VANCOUVER V6T 1Z4,BC,CANADA
来源：
ANALYTICA CHIMICA ACTA | 1993年 / 282卷 / 01期
关键词：
FLOW INJECTION; MASS SPECTROMETRY; GALLIUM; 8-HYDROXYQUINOLINE; INDIUM; SEA WATER; TITANIUM; WATERS;
D O I：
10.1016/0003-2670(93)80352-L
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Picomolar concentrations of dissolved titanium, gallium and indium in sea water are measured using in inductively coupled plasma mass spectrometry (ICP-MS) after concentration and separation from the major ions in sea water via an 8-hydroxyquinoline chelating ion exchange resin (TSK-8HQ). Detection limits of 5-10 pM (0.2-0.4 part per trillion, ppt), 0.5 pM (0.02 ppt) and 0.1 pM (0.01 ppt) were found for Ti, Ga and In, respectively, after a 400-fold (Ti) or 3000-fold (Ga and In) concentration. The detection was blank limited for Ti, due primarily to background interferences from the HNO3 matrix, and sensitivity limited for Ga and In. Open ocean sea water concentrations for these elements are in the range of 6-300 pM for Ti, 2-60 pM for Ga, and 0.1-2.0 pM for In. Sampling and analytical precision of 7-10% was generally found for concentrations greater than twice the detection limit.
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页码：63 / 74
页数：12
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