Determination of cadmium in river water samples by flame AAS after on-line preconcentration in mini-column packed with 2-aminothiazole-modified silica gel
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
01/07/2004
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Resumo |
A rapid and sensitive method was developed to determine trace levels of Cd2+ ions in an aqueous medium by flame atomic absorption spectrometry, using on-line preconcentration in a mini-column packed with 100 mg of 2-aminothiazol modified silica gel (SiAT). The Cd2+ ions were sorbed at pH 5.0. The preconcentrated Cd2+ ions were directly eluted from the column to the spectrometer's nebulizer-burner system using 100 μL of 2 mol L-1 hydrochloric acid. A retention efficiency of over 95% was achieved. The enrichment factor (calculated as the ratio of slopes of the calibration graphs) obtained with preconcentrations in a mini-column packed with SiAT (A = -1.3 × 10-3 + 1.8 × 10-3 [Cd2+]) and without preconcentrations (A = 4 × 10-5 + 3.5 × 10-3[Cd2+]), was 51 and the detection limit calculated was 0.38 μg L-1. The preconcentration procedure was applied to determine trace levels of Cd in river water samples. The optimum preconcentration conditions are discussed herein. |
Formato |
1029-1032 |
Identificador |
http://dx.doi.org/10.2116/analsci.20.1029 Analytical Sciences, v. 20, n. 7, p. 1029-1032, 2004. 0910-6340 http://hdl.handle.net/11449/67792 10.2116/analsci.20.1029 WOS:000222697500007 2-s2.0-3542992106 2-s2.0-3542992106.pdf |
Idioma(s) |
eng |
Relação |
Analytical Sciences |
Direitos |
openAccess |
Palavras-Chave | #2 aminothiazole derivative #cadmium #hydrochloric acid #river water #silica gel #adsorption #aqueous solution #atomic absorption spectrometry #calibration #combustion #concentration (parameters) #elution #flame atomic absorption spectrometry #nebulizer #online system #pH #sensitivity and specificity #water sampling #Cadmium #Calibration #Hydrochloric Acid #Hydrogen-Ion Concentration #Ions #Models, Chemical #Silicon Dioxide #Spectrophotometry #Spectrophotometry, Atomic #Spectrophotometry, Infrared #Thiazoles #Time Factors #Water |
Tipo |
info:eu-repo/semantics/article |