Multisyringe flow injection analysis system for automation of standard addition calibration method

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

Autores

Joao Rodrigo Santos (Autor) REIT; Marcela A Segundo (Autor) FFUP; Jose L F C Lima (Autor) FFUP; Mauro Korn (Autor) Outra

Revista

Título: Microchemical Journal

Vol. 92 Nº 2

Páginas: 180-185

ISSN: 0026-265X

Editora: Elsevier

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 5 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

CORDIS: Ciências da Saúde

Outras Informações

ID Authenticus: P-003-HZE

DOI: 10.1016/j.microc.2009.03.006

Resumo (PT): In the present work, the multi-channel features of multisyringe flow injection analysis (MSFIA) were exploited for the first time to implement calibration based on standard addition method (SAM). For this, standard solutions containing different concentrations of target analyte were placed in each syringe of the multisyringe and connected to a flow network where in-line mixing of sample and standard through a merging zone approach was established prior to detection of analyte. Using this strategy, artifacts reported before in SAM using flow injection analysis were avoided as the concentration of the analyte in the resulting mixture was related to the dilution of sample and added standard within the system, and the concentration of all matrix components was kept constant during all measurements. The feasibility of the proposed MSFIA system was assessed through application to potentiometric determination of chloride ion in electroplating bath and milk samples. Results obtained for samples (n = 15) were not statistically different from those provided by titrimetric procedures, with an excellent throughput (20–31 samples h− 1), comprising four-level addition of chloride ion. <br> <br> Keywords: Standard addition method; Multisyringe flow injection analysis; Potentiometry; Chloride determination; Electroplating bath; Milk <br> <a target="_blank" href="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6W6H-4VYXMVS-1&_user=2460038&_coverDate=07%2F31%2F2009&_rdoc=13&_fmt=high&_orig=browse&_srch=doc-info(%23toc%236599%232009%23999079997%231135051%23FLA%23display%23Volume)&_cdi=6599&_sort=d&_docanchor=&_ct=15&_acct=C000057398&_version=1&_urlVersion=0&_userid=2460038&md5=085cf3db75f7b68af324f835a197ac4b"> Texto integral</a> <br> <br>

Abstract (EN): In the present work, the multi-channel features of multisyringe flow injection analysis (MSFIA) were exploited for the first time to implement calibration based on standard addition method (SAM). For this, standard solutions containing different concentrations of target analyte were placed in each syringe of the multisyringe and connected to a flow network where in-line mixing of sample and standard through a merging zone approach was established prior to detection of analyte. Using this strategy, artifacts reported before in SAM using flow injection analysis were avoided as the concentration of the analyte in the resulting mixture was related to the dilution of sample and added standard within the system, and the concentration of all matrix components was kept constant during all measurements. The feasibility of the proposed MSFIA system was assessed through application to potentiometric determination of chloride ion in electroplating bath and milk samples. Results obtained for samples (n = 15) were not statistically different from those provided by titrimetric procedures, with an excellent throughput (20-31 samples h(-1)), comprising fourlevel addition of chloride ion.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6