Determination of Tributyltin and Triphenyltin in Rice by Gas Chromatography-Flame Photometry

Abstract:

A method for simultaneous determination of tributyltin(TBT) and triphenyltin(TPhT) in rice by GC-FPD was developed in this study.The sample was extracted with CH2Cl2 by ultrasonic and derivatived with NaBEt4,then cleaned up by a column filled with florisil.After that,the extract was determined by GC-FPD,the various factors influencing analysis results were explored.The results present the good linearities between analytical signal and analyte concentration in the range of 0.1～10 mg/L with the linear correlation coefficients of 0.9990,0.9995,respectively.For TBT and TPhT,the method detect limit was 0.049 mg/kg and 0.075 mg/kg,respectively.The average recoveries obtained from samples spiked with standards at the concentration levels of 0.5 mg/L,5.0 mg/L and 10 mg/L was in the range of 96.4%～109.4% with relative standard derivation of 4.09%～8.46%.A satisfactory result was obtained in the determination of organotin compounds in rice.