Thermospray Flame Furnace-AAS Determination of Copper after On-line Sorbent Preconcentration Using a System Optimized by Experimental Designs

• TARLEY César Ricardo Teixeira

  Departamento de Ciências Exatas, Universidade Federal de Alfenas (Unifal-MG)

• FIGUEIREDO Eduardo da Costa

  Departamento de Química Analítica, Universidade Estadual de Campinas (Unicamp)

• MATOS Geraldo Domingues

  Departamento de Química Analítica, Universidade Estadual de Campinas (Unicamp)

抄録

The present paper describes the on-line coupling of a flow-injection system to a new technique, thermospray flame furnace-AAS (TS-FF-AAS), for the preconcentration and determination of copper in water samples. Copper was preconcentrated onto polyurethane foam (PUF) complexed with ammonium O,O-diethyldithiophosphate (DDTP), while elution was performed using 80% (v/v) ethanol. An experimental design for optimizing the copper preconcentration system was established using a full factorial (2⁴) design without replicates for screening and a Doehlert design for optimization, studying four variables: sample pH, ammonium O,O-diethyldithiophosphate (DDTP) concentration, presence of a coil and the sampling flow rate. The results obtained from the full factorial and based on a Pareto chart indicate that only the pH and the DDTP concentration, as well as their interaction, exert influence on the system within a 95% confidence level. The proposed method provided a preconcentration factor of 65 fold, thus notably improving the detectability of TS-FF-AAS. The detection limit was 0.22 µg/dm³ and the precision, expressed as the relative standard deviation (RSD) for eight independent determinations, was 2.7 and 1.1 for copper solutions containing 5 and 30 µg/dm³, respectively. The procedure was successfully applied for copper determination in water samples.

収録刊行物

• Analytical Sciences

  Analytical Sciences 21 (11), 1337-1342, 2005

  社団法人 日本分析化学会

キーワード

• Analytical Chemistry

詳細情報

• CRID: 1390001204257322368
• NII論文ID: 10016775552
• NII書誌ID: AA10500785
• DOI: 10.2116/analsci.21.1337
• COI: 1:CAS:528:DC%2BD2MXhtlGmsr7O
• ISSN: 13482246
• ISSN: 09106340
• NDL書誌ID: 7693975
• PubMed: 16317902
• Web Site: http://id.ndl.go.jp/bib/7693975
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7693975
• Web Site: https://link.springer.com/content/pdf/10.2116/analsci.21.1337.pdf
• Web Site: https://link.springer.com/article/10.2116/analsci.21.1337/fulltext.html
• Web Site: http://www.jstage.jst.go.jp/article/analsci/21/11/21_11_1337/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • PubMed
  • CiNii Articles
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