Abstract
Determination of isocarbophos by cathodically sweeping oscilliopolarography is described. In a 1.0×10−5 mol/L sodium dodecylbenzene sulfonate (SDS)+0.1 mol/L HAC-NaAC (pH=4.0) buffer medium, isocarbophos and its alkaline hydrolysate exhibited sensitive second derivative wave at −0.50 V and −0.48 V respectively. The peak current was linearly proportional to the concentration of isocarbophos in the range of 5.40×10−6−1.05×10−4 mol/L by detecting isocarbophos directly. The detection limit was 3.60×10−6 mol/L with the relative standard derivation (RSD) of 7.3%. By employing an alkaline hydrolysis, the peak current was linearly proportional to the concentration of isocarbophos in the range from 7.70×10−7 mol/L to 1.24×10−4 mol/L, and the detection limit was 5.80×10−7 mol/L with RSD of 3.1%. The hydrolysis procedure and the electrode reaction were studied by voltammetry.
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Foundation item: Supported by the Foundation of Chinese-France Cooperation Program on Advanced Research
Biography: ZHANG Wu-ming (1929-), female, Professor.
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Wu-ming, Z., Nan, L., Jun-hua, H. et al. Determination of isocarbophos by cathodically sweeping oscilliopolarography. Wuhan Univ. J. Nat. Sci. 4, 335–340 (1999). https://doi.org/10.1007/BF02842366
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DOI: https://doi.org/10.1007/BF02842366