Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/2852
Título: Determination of nitrate and nitrite in dairy samples by sequential injection using an in-line cadmium-reducing column
Autor: Lima, M.J. Reis
Fernandes, Sílvia M.V.
Rangel, António O.S.S.
Palavras-chave: Sequential injection
Copperized cadmium column
Nitrate
Nitrite
Dairy samples
Data: 2006
Editora: Elsevier
Citação: LIMA, M.J. Reis ; FERNANDES, Sílvia M.V. ; RANGEL, António O.S.S. - Determination of nitrate and nitrite in dairy samples by sequential injection using an in-line cadmium-reducing column. International Dairy Journal. ISSN 0958-6946. Vol. 16, n.º 12 (2006), p. 1442–1447
Resumo: A sequential injection analysis (SIA) system for the spectrophotometric determination of nitrate in dairy samples was developed. A test portion was aspirated into a carrier solution containing ethylendiaminetetracetic acid (EDTA) and ammonium buffer, which flowed into a copperized cadmium reduction column installed in-line for the determination of the nitrate plus nitrite contents of samples. For the nitrite determination, another test portion of sample was aspirated and directly sent to the detector without reduction. Nitrate content was calculated from the difference between nitrate plus nitrite (expressed as nitrite) and nitrite content. The spectrophotometric determination is based on the Griess reaction. The proposed method was used to test several dairy samples (ultrapasteurized milk with 1.7% milk fat, whey, raw bovine milk and several cheese varieties). Results were statistically in good agreement with those provided by the reference procedure, with a detection limit of 0.15 mgL 1. A sampling rate of 21 determinations per hour can be achieved with this procedure.
URI: http://hdl.handle.net/10400.14/2852
Versão do Editor: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T7C-4JCBKM9-1&_user=2460358&_coverDate=12%2F31%2F2006&_rdoc=4&_fmt=high&_orig=browse&_origin=browse&_zone=rslt_list_item&_srch=doc-info%28%23toc%235055%232006%23999839987%23632157%23FLA%23display%23Volume%29&_cdi=5055&_sort=d&_docanchor=&_ct=15&_acct=C000057417&_version=1&_urlVersion=0&_userid=2460358&md5=bf8e9f687a106eba1c593f73c6571d3e&searchtype=a
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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