Title:	Determination of nitrate in lettuce by ion chromatography after microwave water extraction.
Authors:	NOVAES, H. B. VAITSMAN, D. S. DUTRA, P. B. PEREZ, D. V.
Affiliation:	HUMBERTO BREVILATO NOVAES, UFRJ; DELMO SANTIAGO VAITSMAN, UFRJ; PAULO BECHARA DUTRA, UFRJ; DANIEL VIDAL PEREZ, CNPS.
Date Issued:	2009
Citation:	Química Nova, São Paulo, v. 32, n. 6, p. 1647-1650, 2009.
Description:	Lettuce is worldwide known as the most important vegetable. In this context, most farmers are searching new techniques for best quality products including hydropony. However, nitrate is of great concern, since it has a negative impact on human metabolism. The main objective of the present work was to evaluate the nitrate content of lettuce produced by conventional and hydroponic systems. The determination was conducted by ion chromatography and a new method of extraction was tested using microwave oven digestion. The results indicated that nitrate level produced in the conventional system was lower than in the hydroponic system.
Thesagro:	Cromatografia
Keywords:	Chromatrography
DOI:	https://doi.org/10.1590/S0100-40422009000600049
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Nota Técnica/Nota científica (CNPS)