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

Title
Multi-syringe flow injection system with in-line microwave digestion for the determination of phosphorus
Type
Article in International Scientific Journal
Year
2004
Authors
Almeida, MIGS
(Author)
Other
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Segundo, MA
(Author)
REIT
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Rangel, AOSS
(Author)
Other
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Journal
Title: TalantaImported from Authenticus Search for Journal Publications
Vol. 64 No. 5
Pages: 1283-1289
ISSN: 0039-9140
Publisher: Elsevier
Indexing
Scientific classification
FOS: Natural sciences > Chemical sciences
CORDIS: Health sciences
Other information
Authenticus ID: P-000-7AH
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.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 7
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