Copper determination by flow injection on-line sorbent preconcentration coupled with flame atomic absorption spectrometry using 1,10 phenanthroline

✍ Scribed by Akbar Ali; Hong Shen; Xue Gu; Guangming Xu; Yingxue Ye; Xuefeng Yin

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 144 KB
• Volume: 12
• Category: Article
• ISSN: 0895-7533
• DOI: 10.1002/(sici)1098-2728(2000)12:2<97::aid-lra9>3.0.co;2-a

✦ Synopsis

1,10 Phenanthroline (phen) has been tested as a complexing agent, which is more stable and selective than sodium-diethyldithiocarbamate (DDTC) and ammonium-pyrrolidinedithiocarbamate (APDC), for on-line preconcentration of copper on RP-C 18 material in a microcolumn with a flow injection-flame atomic absorption spectrometer (Fl-FAAS) system. The on-line formed copper-phen complexes can be adsorbed on the C 18 sorbent material. Various parameters affecting the copper-phen complex formation and its subsequent adsorption on the microcolumn as well as its elution into the nebulizer of the atomic absorption spectrometer (AAS) were optimized. A 2.5 ‫ן‬ 10 ‫3מ‬ mol/L phen in 2% ethanol was mixed on-line with aqueous sample solution acidified with 0.1% (v/v) nitric acid and flowed through the microcolumn for 30 seconds. The adsorbed copper-phen complexes in the microcolumn were eluted with ethanol for 10 seconds into the nebulizer of AAS. A good precision (RSD ‫ס‬ 3.0%; n ‫ס‬