Abstract
A simultaneous determination method for 9 organotin compounds in polyvinyl chloride (PVC) and silicone products used as kitchen utensils and food packages was developed using ethyl derivatization with sodium tetraethylborate (NaBEt4). Organotin compounds were extracted with acetone-hexane (3 : 7) from the samples after acidification and the extract was filtered and concentrated at under 40°C. After centrifugal separation, these compounds were derivatized with 2% NaBEt4 solution and determined by GC/MS. This method was applicable for simple routine analysis. Recoveries of spiked compounds were 49.1∼118.1% for 3 PVC products and 88.8∼102.2% for a siliconized paper. Monooctyltin, dioctyltin and trioctyltin compounds were found in all PVC food containers at the levels of 123∼1,380 μg/g, 1,770∼13,200 μg/g and 6.6∼139 μg/g, respectively. They also were found in 3 gloves, 5 spouts, 1 hose and 5 pipes. Some PVC products contained monomethyltin, dimethyltin, trimethyltin, monobutyltin and dibutyltin compounds at the levels of 97.3∼433 μg/g, 96.5∼5,120 μg/g, 8.5∼24.9 μg/g, 1.2∼852 μg/g and 1.2∼29.4 μg/g, respectively.
