Carpinteiro J, Rodríguez I, Cela R
Dpto. Química Analitica, Nutrición y Bromatología, Facultad de Química, Universidad de Santiago de Compostela, Spain.
Fresenius J Anal Chem. 2001 Aug;370(7):872-7. doi: 10.1007/s002160100885.
A fast and simple procedure is presented for the simultaneous leaching of butyl (mono, di and tributyl) and phenyl organotin species from sediment samples. Leached compounds are further ethylated with sodium tetraethylborate in aqueous medium, and analyzed by gas chromatography. After testing the stability of triphenyltin under different extraction conditions, ultrasound-assisted leaching at room temperature in the presence of acetic acid was been proposed as an extraction procedure compatible with the simultaneous determination of phenyl- and butyltin compounds in sediments. Recoveries between 70 and 90% were obtained for phenyl species in spiked samples prepared in the laboratory. Results for butyltin species were validated by use of the reference material PACS-2. Quantification limits, using GC-MIP-AES as measurement technique, were approximately 5-10 ng g(-1). Precision in the consecutive analysis of three sediment samples varied between 3 and 10%.
本文介绍了一种快速简便的方法，用于同时从沉积物样品中浸出丁基（一丁基、二丁基和三丁基）和苯基有机锡物种。浸出的化合物在水介质中用四乙基硼酸钠进一步乙基化，然后通过气相色谱分析。在测试了三苯基锡在不同萃取条件下的稳定性后，提出了在室温下于乙酸存在下进行超声辅助浸出，作为一种与沉积物中苯基和丁基锡化合物同时测定相兼容的萃取方法。在实验室制备的加标样品中，苯基物种的回收率为70%至90%。丁基锡物种的结果通过使用参考物质PACS-2进行了验证。使用GC-MIP-AES作为测量技术时，定量限约为5-10 ng g(-1)。对三个沉积物样品进行连续分析的精密度在3%至10%之间。
