Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/3312
Título: A multi-syringe flow injection system for the spectrophotometric determination of trace levels of iron in waters using a liquid waveguide capillary cell and different chelating resins and reaction chemistries
Autor: Páscoa, Ricardo N. M. J.
Tóth, Ildikó V.
Rangel, António O.S.S.
Palavras-chave: Iron
Multi-syringe flow injection analysis
Liquid waveguide capillary cel
Pre-concentration resins
Spectrophotometry
Data: 2009
Editora: Elsevier
Citação: PÁSCOA ,Ricardo N. M. J. ; TÓTH, Ildikó V. ; RANGEL, António O.S.S. - A multi-syringe flow injection system for the spectrophotometric determination of trace levels of iron in waters using a liquid waveguide capillary cell and different chelating resins and reaction chemistries. Microchemical Journal. ISSN 0026-265X. Vol. 93, n.º 2 (2009), p. 153–158
Resumo: A method integrating a long waveguide capillary cell with a preconcentration resin in a multi-syringe flow injection analysis (MSFIA) system for iron determination in waters was developed. The determination of iron is based on a colorimetric reaction and two reagents were tested, ferrozine and ammonium thiocyanate. A liquid waveguide capillary cell (1.0 m pathlength, 550 μm i.d. and 250 μL internal volume) with a preconcentration resin were used to improve the sensitivity of the determination. Two different preconcentration resins were also tested, Chelex 100 and NTA Superflow. The developed method employing the NTA Superflow with ferrozine colorimetric reagent provided a detection limit of 0.05 μg L−1 with a linear response up to 8 μg L−1 and a sample throughput rate of 12 per hour. The developed system presents low reagents/sample consumptions. The accuracy was assessed using a certified reference water sample.
URI: http://hdl.handle.net/10400.14/3312
Versão do Editor: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6W6H-4WKTX4K-1&_user=2460358&_coverDate=11%2F30%2F2009&_rdoc=8&_fmt=high&_orig=browse&_origin=browse&_zone=rslt_list_item&_srch=doc-info(%23toc%236599%232009%23999069997%231536232%23FLA%23display%23Volume)&_cdi=6599&_sort=d&_docanchor=&_ct=23&_acct=C000057417&_version=1&_urlVersion=0&_userid=2460358&md5=d87f78da85db522db42c72ef6ed9166c&searchtype=a
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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