Preconcentrative separation of chromium(III) species from chromium(VI) by cloud point extraction and determination by flame atomic absorption spectrometry
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SPRINGER WIEN
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We describe a high-throughput technique for the determination of chromium species in water samples by flame atomic absorption spectrometry (FAAS) after preconcentrative separation of Cr(III) species from Cr(VI) by cloud point extraction (CPE) using diethyldithiocarbamate (DDTC) as the chelating agent and the nonionic surfactant Triton X-100 as the extractant. The Cr(III)-DDTC complex is extracted if the temperature is higher than the CPE temperature of Triton X-100, while Cr(VI) remains in the aqueous phase. The Cr(III) in the surfactant phase was analyzed by FAAS, and the concentration of Cr(VI) was calculated by subtraction of Cr(III) from total chromium which was directly determined by FAAS. The effect of pH, concentration of chelating agent, surfactant, and equilibration temperature were investigated. The detection limit for Cr(III) was 0.08 mu g L-1 with an enrichment factor of 98, and the relative standard deviation was 1.2% (n=3, c=100 mu g L-1). A certified reference material and several water samples were analyzed with satisfactory results.
Açıklama
Anahtar Kelimeler
Cloud point extraction, Chromium, Diethyldithiocarbamate, Triton X-100, Flame atomic absorption spectrometry
Kaynak
MICROCHIMICA ACTA
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
174
Sayı
03.04.2020
