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

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Almeida, MIGS (Author) Other; Segundo, MA (Author) REIT; Lima, JLFC (Author) FFUP; Rangel, AOSS (Author) Other

Journal

Title: Talanta

Vol. 64 No. 5

Pages: 1283-1289

ISSN: 0039-9140

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 15 Citations

ISI Web of Science

Scopus - 18 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

CORDIS: Health sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7