Determination of Cu, Zn, Fe, Ni and Cd by flame atomic absorption spectrophotometry after preconcentration by Escherichia coli immobilized on sepiolite
Yükleniyor...
Tarih
2000
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A method for the determination of Cu, Zn, Fe, Ni and Cd by flame atomic absorption spectrophotometry (FAAS) after preconcentrating on a column containing Escherichia coli immobilized on sepiolite has been developed. Optimum pH values, amount of adsorbent, elution solution and flow rate have been obtained for the elements studied. The effect of interfering ions on the recovery of the analytes has also been investigated. Recoveries of Cu, Zn, Fe, Ni and Cd by E. coli immobilized on sepiolite were 99.1 +/- 0.6, 98.2 +/- 0.6, 98.1 +/- 0.5, 97.2 +/- 0.8 and 98.2 +/- 0.4% at 95% confidence level, respectively. The adsorption capacity of E. coli immobilized on sepiolite was found as 0.148, 0.064, 0.098, 0.134 and 0.088 mmol/g for Cu, Zn, Fe, Ni and Cd, respectively. The proposed method was applied to the determination of trace metals in alloys (NBS SRM 85b). Trace metals have been determined with relative error lower than 10%. (C) 2000 Elsevier Science B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Cu, Zn, Fe, Ni, and Cd determination, preconcentration, Escherichia coli, immobilization, sepiolite, flame atomic absorption spectrometry
Kaynak
Talanta
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
51
Sayı
5
Künye
closedAccess
