Sequential injection fluorimetric determination of Sn in juices of canned fruits

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Elane S B Boa Morte (Autor) Outra; Maria Gracas A Korn (Autor) Outra; Lucia L M F S Saraiva (Autor) FFUP; Jose L F C Lima (Autor) FFUP; Paula C A G Pinto (Autor) FFUP

Revista

Título: Talanta

Vol. 79 Nº 4

Páginas: 1100-1103

ISSN: 0039-9140

Editora: Elsevier

Indexação

ISI Web of Knowledge - 17 Citações

ISI Web of Science

Scopus - 19 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

CORDIS: Ciências da Saúde

Outras Informações

ID Authenticus: P-003-FSH

DOI: 10.1016/j.talanta.2009.02.019

Resumo (PT): The present work describes the development of a fast and robust sequential injection fluorimetric procedure for the determination of Sn in juices of canned fruits. The developed automatic methodology is based on the complexation of Sn with 8-hydroxyquinoline-5-sulfonic acid (HQSA) to form a fluorimetric product (λexc = 354 nm; λem = 510 nm). The influence of dimethylsulfoxide (DMSO) and cetylpyridinium bromide (CPB) on the sensitivity of the fluorimetric determination was evaluated. Linear calibration plots were obtained for Sn concentrations between 1 and 10 mg L−1, with a detection limit of 0.38 mg L−1. In each analytical cycle 0.006 mg of HQSA and 0.47 mg of CPB were consumed and 1.5 mL of effluent was generated. The developed methodology was applied to the determination of Sn in juices of canned fruits and the results complied with those furnished by an electrothermal atomic absorption spectrometry comparison procedure, with relative deviations lower than 5.2%. The automatic procedure exhibited good precision (R.S.D. < 1.4%) and the sampling rate was about 70 determinations per hour. <br> <br> Keywords: Tin (Sn); SIA; Fluorescence; Micellar media; Canned fruit <br> <a target="_blank" href="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6THP-4VNH3PS-2&_user=2460038&_coverDate=09%2F15%2F2009&_rdoc=24&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235288%232009%23999209995%231318055%23FLA%23display%23Volume)&_cdi=5288&_sort=d&_docanchor=&_ct=37&_acct=C000057398&_version=1&_urlVersion=0&_userid=2460038&md5=b9a0ecd095a08d0d046881a9f64c8991"> Texto integral</a> <br> <br>

Abstract (EN): The present work describes the development of a fast and robust sequential injection fluorimetric procedure for the determination of Sn in juices of canned fruits. The developed automatic methodology is based on the complexation of Sn with 8-hydroxyquinoline-5-sulfonic acid (HQSA) to form a fluorimetric product (lambda(exc) = 354 nm; lambda(em) = 510 nm). The influence of climethylsulfoxide (DMSO) and cetylpyridinium bromide (CPB) on the sensitivity of the fluorimetric determination was evaluated. Linear calibration plots were obtained for Sn concentrations between 1 and 10 mg L(-1), with a detection limit of 0.38 mg L(-1). In each analytical cycle 0.006 mg of HQSA and 0.47 mg of CPB were consumed and 1.5 mL of effluent was generated. The developed methodology was applied to the determination of Sn in juices of canned fruits and the results complied with those furnished by an electrothermal atomic absorption spectrometry comparison procedure, with relative deviations lower than 5.2%. The automatic procedure exhibited good precision (R.S.D. < 1.4%) and the sampling rate was about 70 determinations per hour.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4