H-point standard addition method applied to simultaneous kinetic determination of antimony(III) and antimony(V) by adsorptive linear sweep voltammetry.
In this work, the applicability of H-point standard addition method (HPSAM) to the kinetic voltammetry data is verified. For this purpose, a procedure is described for the determination of Sb(III) and Sb(V) by adsorptive linear sweep voltammetry using pyrogallol as a complexing agent. The method is based on the differences between the rate of complexation of pyrogallol with Sb(V) and Sb(III) at pH 1.2. The results show that the H-point standard addition method is suitable for the speciation of antimony. Sb(III) and Sb(V) can be determined in the ranges of 0.003-0.120 and 0.010-0.240 microg mL(-1), respectively. Moreover, the solution is analyzed for any possible effects of foreign ions. The obtained results show that the HPSAM in combination to electroanalytical techniques is a powerful method with high sensitivity and selectivity. The procedure is successfully applied to the speciation of antimony in water samples.
Zarei
K
K
School of Chemistry, Damghan University of Basic Sciences, Damghan, Iran. zarei@dubs.ac.ir
Atabati
M
M
Karami
M
M
D000327:Adsorption; D000965:Antimony / Q000032:analysis* / Q000737:chemistry*; D002384:Catalysis; D004563:Electrochemistry; D007202:Indicators and Reagents; D007700:Kinetics; D011048:Polarography; D011748:Pyrogallol / Q000737:chemistry; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000032:analysis; D014881:Water Supply / Q000032:analysis
D007202:Indicators and Reagents; D012996:Solutions; D014874:Water Pollutants, Chemical; D011748:Pyrogallol; D000965:Antimony