Study On The Determination Of Organotin Additives In Textile Matrix

The organotins is a kind of tin-containing organic compounds. They were found to have androgenic-like endocrine disruption bioactivities, and were used as stain control agents, antiseptics, agricultural insecticides, fungicides and so on. More importantly, they were widely industrially applied as stabilizing agents in textiles. However, with the increasing use of organotins, it not only caused serious environmental pollutions, but also affects the human health by damaging the human liver and kidney, as well as biochemical and enzymatic systems. The organotins are more dangerous to children’s health. Recently, the governments of developed countries, including the European Union, the United States, Canada, and Sweden, have enacted laws to restrict the use of organotin compounds as additives in textiles. However, only three compounds including monobutyltin, dibutyltin and tributyltin could be detected by the authoritative method (national standard GB/T20385-2006), which was unable to meet the requirements of daily detection of organotin additives in textiles. Therefore, it is necessary to develop the method for the determination of organotin additives in textiles.In this thesis, two methods for the determination of organotin additives in textiles both by inductively coupled plasma-atomic emission spectrometry (ICP-AES) and gas chromatography-mass spectrometry (GC-MS) was developed. The main contents of this work were as following:1. A rapid screening method for the determination of organotin additives in textiles by ICP-AES was established. The sample was directly detected by ICP-AES after extracting with acidic sweat. The detection limit of this method was reached to0.01mg/kg, and the recoveries were between81.7%-93.6%with relative standard deviations (RSD) of1.8%-40%. The sample pretreatment procedure was sample, fast and efficiency.2. A method for the simultaneous determination of5kinds of organotin additives in textiles by GC-MS was established. The textile sample was first extracted with acidic sweat, and then the extract was derivated with sodium tetraethyl borate, followed by extracting with hexane. Finally, the extraction was directly analyzed by gas chromatography-mass spectrometric in selective ion mode. The detection limit of this method was reached to0.1mg/kg, and the linear correlation coefficient was more than0.999. The recoveries were between80%-108%and the relative standard deviations ranged from2.3%to7.9%.The established methods are simple, fast and valid with the quantitative limits much lower than the related authoritative method. The methods meet the requirements for daily determination of organotin additives in textiles.