Determination of Organotin in Water by Purge and Trap Gas Chromatography-Flame Ionization Detection

• Main Authors: TANG CHUEN HE, 唐川禾
• Other Authors: Wei-hsien Wang
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/00031685326258811126

碩士 === 國立中山大學 === 海洋資源學系 === 88 === Abstract Organotin compounds have been extensively used in agriculture and industry. The utilization of tributyltin(TBT) in marine antifoul-ing paints pollutes water body significantly. Due to the high toxicity of organotins, there are increased concern for marine environments. A purge and trap system coupled to a gas chromatography(GC) equipped with a flame ionization detector(FID) was used to analyze organotin compounds in water samples. Hydride derivation of orga-notin compounds is conducted by reacting with 5 % sodium boro-hydride in acidic condition(0.03 N HCl) to give the best result. The sample solution is purged with He gas(175 ml/min) for 20 min. to insure the maximum recovery of volatile organotin hydride derivatives. Salinity of sample solution is also an important factor that affects the magnitude of detection signals. Method detection limits are 0.30, 0.15 and 0.06 ng/ml for mono-butyltin, dibutyltin and tributyltin, respectively, and their relative standard deviations are < 5 %. Recovery percentage for different concentration of tributyltin chloride recovery range is 28.9 ~ 40.2 %. Calibration graphs for three kinds of organotin species are linear in the range of 1-10 ng/ml.