Comparison of Analytical Methods for Quantifying the Levels of Lead, Cadmium, Chromium, and Nickel in Mineral Fertilizers and Industrial By-products

Autor:	Camila Prado Cenciani de Souza, Cristiano Alberto de Andrade, Cleide Aparecida de Abreu, José Francisco da Cunha, Aline Renee Coscione Gomes
Rok vydání:	2014
Předmět:	Cadmium Extraction (chemistry) Soil Science chemistry.chemical_element Hydrochloric acid Sulfuric acid Zinc chemistry.chemical_compound Chromium Nickel chemistry Nitric acid Environmental chemistry Agronomy and Crop Science Nuclear chemistry
Zdroj:	Communications in Soil Science and Plant Analysis. 46:34-56
ISSN:	1532-2416 0010-3624
DOI:	10.1080/00103624.2014.988089
Popis:	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 ...
Databáze:	OpenAIRE
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