Pneumatic flow injection analysis-tandem spectrometer system for iron speciation.
A pneumatic flow injection-tandem spectrometer system, without a delivery pump was used for the speciation of iron. In this system, the suction force of a pneumatic nebulizer of a flame absorption spectrometer was used for solution delivery through the manifold. The Fe(III) and total Fe concentrations were determined using thiocyanate ion in a UV-Vis spectrometer and a FAAS, respectively. The Fe(II) was determined by the difference. The calibration curves were linear up to 18 microg mL(-1) and 25 microg mL(-1) with detection limits of 0.09 microg mL(-1) and 0.07 microg mL(-1) for Fe(III) and Fe(II), respectively. The mid-range precision and accuracy were <2.5% and +/-3% for the two species, respectively, at a sampling rate of 120 h(-1). This system was applied for the determination of Fe(III) and Fe(II) in industrial water, natural water and spiked samples.
Noroozifar
Meissam
M
Analytical Research Laboratory, Department of Chemistry, University of Sistan & Baluchestan, Zahedan, P.O. Box 98165-181, Iran. mnoroozifar@hamoon.usb.ac.ir
Khorasani-Motlagh
Mozhgan
M
Akbari
Reza
R
D002138:Calibration; D005290:Ferric Compounds / Q000032:analysis*; D005296:Ferrous Compounds / Q000032:analysis*; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation / Q000379:methods; D013861:Thiocyanates / Q000032:analysis
D005290:Ferric Compounds; D005296:Ferrous Compounds; D013861:Thiocyanates; C031760:thiocyanate