Abstract：A method was established for determination of antimony by fluorescence quenching method in the presence of OP-10 emulsifier with NH3-NH4Cl buffer solution as medium and m-phenylenedioxydiacetic acid (m-PA) as fluorescent reagent. The effects of acidity and dosage of buffer solution, the surfactant and its dosage as well as the dosage of m-PA solution on the test system were investigated and accordingly the optimal experimental conditions were determined. The results showed that the system had a maximum emission wavelength λem = 609 nm (the maximum excitation wavelength λex = 302 nm), antimony content in the range of 0.04-0.48 μg/L constituted a fine linear relationship with the fluorescence quenching value(ΔF) and the detection limit was 0.034 5 μg/L. The method was applied to the determination of antimony in tap water, spring water and river water samples, the results were consistent with those obtained by atomic absorption spectrometry(AAS), and the relative standard deviations (RSD, n=6) were in the range of 3.2%-4.5%.
Guo Huishi, Xiao Pengfeng, Nie Libo, et al. Determination of trace amount of antimony by adsorption voltammetry on carbon paste electrode[J]. Journal of Southeast University, 2004, 20 (l): 221-225.
[6]
Md Nurul Amin, Satoshi Kaneco, Ken Nomura, et a1. Determination of antimony in waters by electrothermal atomic absorption spectrometry with preconcentration on a tantalum wire [J]. Microchim. Acta, 2003, 141:87-91.
