Solvent microextraction-flame atomic absorption spectrometry (SME-FAAS) for determination of ultratrace amounts of cadmium in meat and fish samples.
A simple, low cost and highly sensitive method based on solvent microextraction (SME) for separation/preconcentration and flame atomic absorption spectrometry (FAAS) was proposed for the determination of ultratrace amounts of cadmium in meat and fish samples. The analytical procedure involved the formation of a hydrophobic complex by mixing the analyte solution with an ammonium pyrrolidinedithiocarbamate (APDC) solution. In suitable conditions, the complex of cadmium-APDC entered the micro organic phase, and thus, separation of the analyte from the matrix was achieved. Under optimal chemical and instrumental conditions, a detection limit (3 sigma) of 0.8 ng L(-1) and an enrichment factor of 93 were achieved. The relative standard deviation for the method was found to be 2.2% for Cd. The interference effects of some anions and cations were also investigated. The developed method has been applied to the determination of trace Cd in meat and fish samples.
Goudarzi
Nasser
N
Faculty of Chemistry, Shahrood University of Technology, Shahrood, Iran. goudarzi10@yahoo.com
D000818:Animals; D002104:Cadmium / Q000032:analysis*; D005399:Fishes; D006863:Hydrogen-Ion Concentration; D008460:Meat / Q000032:analysis*; D008832:Microchemistry; D009994:Osmolar Concentration; D012997:Solvents; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013696:Temperature
D012997:Solvents; D002104:Cadmium