Data/hora: 05/06/2024 00:10:04

Biblioteca(s): 	Embrapa Meio Ambiente.	
Data corrente: 	28/03/2016	
Data da última atualização: 	28/03/2016	
Autoria: 	SOUZA, C. P. C.; ABREU, C. A. de; ANDRADE, C. A. de; COSCIONE, A. R.; CUNHA, J. F. da.	
Afiliação: 	CAMILA PRADO CENCIANI DE SOUZA, IAC; CLEIDE APARECIDA DE ABREU, IAC; CRISTIANO ALBERTO DE ANDRADE, CNPMA; ALINE RENEE COSCIONE, IAC; JOSE FRANCISCO DA CUNHA, Tec-Fértil.	
Título: 	Comparison of analytical methods for quantifying the levels of lead, cadmium, chromium, and nickel in mineral fertilizers and industrial by-products.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Communications in Soil Science and Plant Analysis, New York, v. 46, sup. 1, p. 34-56, 2015.	
Idioma: 	Inglês	
Conteúdo: 	Abstract: The control of contaminants in fertilizers and industrial by-products is fundamental to safe food production, and it requires low-cost, reliable test methods. The aim of this study was to evaluate the performance of the USEPA 3051a and alternative analytical methods [concentrated hydrochloric acid (HCl), 10 percent HCl, 10 percent sulfuric acid (H2SO4), and 50 mmol L?1 diethylenetriaminepentaacetic acid (DTPA)] for quantifying the levels of lead, cadmium, chromium, and nickel in zinc and/or copper sources. The sample digestions with concentrated HCl, H2SO4, and nitric acid (HNO3) (USEPA 3051a) were heated. Extraction without heating and stirring was employed in 10 percent HCl and 50 mmol L?1 DTPA methods. The Graybill?s modified F-test, t-test for mean error, and the linear correlation coefficient analysis were used to compare test method performance. Equivalent results to USEPA 3051a were found with the following methods: DTPA for the extraction of lead in zinc sources and concentrated HCl and H2SO4 for the extraction of cadmium and chromium in copper sources. However, the absolute values of cadmium, chromium, and nickel recovered by the use of H2SO4 were greater regardless of the source. The greater extraction of contaminants in the evaluated methods suggests that there is need to review the official method if the aim is to quantify the total levels of these elements in raw materials and mineral fertilizers.	
Palavras-Chave: 	By-products.	
Thesaurus Nal: 	analytical methods; heavy metals.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CNPMA - (15037-1) - UPC - AP - DD -  -  -  - DIS