Zuliani Tea, Lespes Gaetane, Milacic Radmila, Scancar Janez, Potin-Gautier M
Department of Environmental Sciences, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
J Chromatogr A. 2006 Nov 3;1132(1-2):234-40. doi: 10.1016/j.chroma.2006.07.054. Epub 2006 Aug 7.
Organotin compounds (OTCs) have been identified in a variety of environmental media (air, surface water, groundwater, soil and sediments). In the past, much attention was assigned to the study of the OTCs content in biological samples, water and sediments. Little information about OTCs in soil is available. In this work, a procedure for butyl and phenyltin determination in soils by headspace-solid-phase microextraction (HS-SPME) gas chromatography-pulsed flame photometric detection (GC-PFPD) was investigated. For SPME analysis, a polydimethylsiloxane (PDMS) coating was applied. Peat soil rich in organic matter and with a high cation-exchange capacity (CEC), and clay soil low in organic matter and with a low CEC were analysed. The influence of these different soil matrices on HS-SPME analysis was evaluated by spiking of samples. In general, the recoveries for the two spiked soils exceeded 80%. The repeatability of the method was better than 10%. The limits of detection (LODs) and limits of quantification (LOQs) were in the ng S ng(-1) range. The technique may be reliably applied for the determination of butyltins and monophenyltin in soils, while it shows some limitations for the analysis of di- and triphenyltin (TPhT).
有机锡化合物（OTCs）已在多种环境介质（空气、地表水、地下水、土壤和沉积物）中被检测到。过去，人们十分关注生物样品、水和沉积物中OTCs含量的研究。关于土壤中OTCs的信息却很少。在这项工作中，研究了一种采用顶空-固相微萃取（HS-SPME）气相色谱-脉冲火焰光度检测（GC-PFPD）测定土壤中丁基锡和苯基锡的方法。对于固相微萃取分析，采用了聚二甲基硅氧烷（PDMS）涂层。分析了富含有机质且阳离子交换容量（CEC）高的泥炭土以及有机质含量低且CEC低的黏土。通过对样品加标评估了这些不同土壤基质对HS-SPME分析的影响。总体而言，两种加标土壤的回收率超过80%。该方法的重复性优于10%。检测限（LODs）和定量限（LOQs）在纳克每克（ng g⁻¹）范围内。该技术可可靠地用于测定土壤中的丁基锡和单苯基锡，而在二苯基锡和三苯基锡（TPhT）分析方面存在一些局限性。
