Multi-syringe flow injection system with in-line microwave digestion for the determination of phosphorus

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

Almeida, MIGS (Autor) Outra; Segundo, MA (Autor) REIT; Lima, JLFC (Autor) FFUP; Rangel, AOSS (Autor) Outra

Revista

Título: Talanta

Vol. 64 Nº 5

Páginas: 1283-1289

ISSN: 0039-9140

Editora: Elsevier

Indexação

ISI Web of Knowledge - 15 Citações

ISI Web of Science

Scopus - 18 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

CORDIS: Ciências da Saúde

Outras Informações

ID Authenticus: P-000-7AH

DOI: 10.1016/j.talanta.2004.04.006

Resumo (PT): A multi-syringe system for spectrophotometric determination of total phosphorus involving in-line digestion is proposed. Sample and digestion solution were dispensed and directed towards a digestion vessel located inside a domestic microwave oven (MWO) where sample digestion took place. Afterwards, the digested sample was merged with the necessary reagents for the colorimetric determination based on the molybdenum blue method. Several digestion conditions were studied regarding composition of digestion solution, digestion time and power set on the MWO. The system was applied to waste water samples and results shown a good agreement with the reference method. Repeatable results (R.S.D.<2.41%) and determination frequency of 12 h−1 were obtained. <br> <br> Author Keywords: Multi-syringe flow analysis; Total phosphorus; Microwave; In-line digestion; Waste waters <br> <a target="_blank" href="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6THP-4DMWRTC-2&_user=2460038&_coverDate=12%2F15%2F2004&_rdoc=33&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235288%232004%23999359994%23524961%23FLA%23display%23Volume)&_cdi=5288&_sort=d&_docanchor=&_ct=46&_acct=C000057398&_version=1&_urlVersion=0&_userid=2460038&md5=f5d9a7142351b8abe7cee5dbd260366d"> Texto integral</a> <br> <br>

Abstract (EN): A multi-syringe system for spectrophotometric determination of total phosphorus involving in-line digestion is proposed. Sample and digestion solution were dispensed and directed towards a digestion vessel located inside a domestic microwave oven (MWO) where sample digestion took place. Afterwards, the digested sample was merged with the necessary reagents for the colorimetric determination based on the molybdenum blue method. Several digestion conditions were studied regarding composition of digestion solution, digestion time and power set on the MWO. The system was applied to waste water samples and results shown a good agreement with the reference method. Repeatable results (R.S.D. < 2.41%) and determination frequency of 12h(-1) were obtained.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7