Artigo
Direct determination of Cu, Cd, Ni and Pb in aquatic humic substances by graphite furnace atomic absorption spectrometry
Fecha
2011-07-01Registro en:
Current Analytical Chemistry. Sharjah: Bentham Science Publ Ltd, v. 7, n. 3, p. 220-224, 2011.
1573-4110
WOS:000293130200007
0000-0002-2042-018X
Autor
IFMT Inst Fed Educ Ciência & Tecnol Mato Grosso
Universidade Federal de Mato Grosso (UFMT)
Universidade Estadual Paulista (Unesp)
UFOP
Resumen
A method has been developed for the direct determination of Cu, Cd, Ni and Pb in aquatic humic substances (AHS) by graphite furnace atomic absorption spectrometry. AHS were isolated from water samples rich in organic matter, collected in the Brazilian Ecological Parks. All analytical curves presented good linear correlation coefficient. The limits of detection and quantification were in the ranges 2.5-16.7 mu g g(-1) and 8.5-50.0 mu g g(-1), respectively. The accuracy was determined using recovery tests, and for all analytes recovery percentages ranged from 93 - 98 %, with a relative standard deviation less than 4 %. The results indicated that the proposed method is a suitable alternative for the direct determination of metals in AHS.