Please use this identifier to cite or link to this item:
https://repositorio.ufba.br/handle/ri/14372
metadata.dc.type: | Artigo de Periódico |
Title: | On-line system for preconcentration and determination of metals in vegetables by Inductively Coupled Plasma Optical Emission Spectrometry |
Other Titles: | Journal of Hazardous Materials |
Authors: | Bezerra, Marcos de Almeida Santos, Walter Nei Lopes dos Lemos, Valfredo Azevedo Korn, Maria das Graças Andrade Ferreira, Sergio Luis Costa |
metadata.dc.creator: | Bezerra, Marcos de Almeida Santos, Walter Nei Lopes dos Lemos, Valfredo Azevedo Korn, Maria das Graças Andrade Ferreira, Sergio Luis Costa |
Abstract: | A procedure has been developed for the simultaneous determination of trace amounts of cadmium, copper, chromium, nickel and lead in digested vegetable samples. The method involves solid-phase extraction of the metals using a minicolumn of Amberlite XAD-4 modified with dihydroxybenzoic acid (DHB) and detection by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The elution of the metals from minicolumn was performed with 1.0 mol L−1 hydrochloric acid. Variables associated with flow preconcentration system performance, such as pH, buffer concentration, eluent concentration and sampling flow rate, were optimized. The developed procedure provides enrichment factors of 100, 72, 16, 91 and 53, for cadmium, copper, chromium, nickel and lead, respectively. Detection limits (3σB) were 0.02 (Cd), 0.23 (Cu), 0.58 (Cr), 0.060 (Ni) and 0.54 (Pb) μg L−1. The procedure was applied for determination of metals in samples of guarana and cabbage. The accuracy of the method was checked by the analysis of a certified reference material (NIST 1571, Orchard leaves). Results found were in agreement with certified values. |
Keywords: | ICP-OES Preconcentration Metal Vegetable |
metadata.dc.rights: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/14372 |
Issue Date: | 2007 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1-s2.0-S030438940700297X-main.pdf | 382,83 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.