期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 57, 期 3, 页码 391-402出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0584-8547(01)00401-3
关键词
inductively coupled plasma-mass spectrometry (ICP-MS); saline sample analysis; multielemental determination; sequential injection analysis (SIA); on-line column preconcentration
类别
A simple, versatile and economical method of sequential injection analysis and inductively coupled plasma-mass spectrometry with matrix removal in two different ion-exchange resins for the determination of Al, As, Co, Cu, Mn, Mo, Ni, Pb and V is reported. The resins used, both of which contain the iminodiacetic acid functional group, were Chelex 100 and Metpac CC-1. With both resins, a matrix removal step (alkaline and alkaline-earth metals) with ammonium acetate is required before elution of the analytes with 2 M HNO3. The procedure was validated by analyzing CASS-3 seawater reference material and good agreement was found with the certified values. Precision (n = 8) for the nine elements was in the range 0.8-4.9% for the Chelex 100 column and the recoveries ranged from 87.4 to 107.9%, except for Cu (78.7%) and Pb (74.9%), owing to the formation of hydroxides. For the Metpac CC-1 column, precision for the nine elements was in the range 1.2-7.1% and the recoveries between 91.7 and 109.3% except for Al (127.2%), Co (118.5%) and Ni (127.5%) due to contamination problems. (C) 2002 Elsevier Science B.V All rights reserved.
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