Botana J Carpinterio, Pereiro I Rodríguez, Torrijos R Cela
Departamento de Química Analítica, Nurrición y Bromatología, Universidad de Santiago de Compostela, Spain.
J Chromatogr A. 2002 Jul 19;963(1-2):195-203. doi: 10.1016/s0021-9673(02)00550-2.
A procedure for the rapid determination of mono-, di- and tributyltin in water samples is described. The analytes are simultaneously ethylated and concentrated on a solid-phase microextraction fibre placed in the headspace over the sample for 2 min. The ethylated species are then separated and selectively quantified in only 90 s using a multicapillary gas chromatography column combined with atomic emission detection. The influence of blank signals and sampling conditions on the sensitivity of the method is described. Detection limits of 1-5 ng/l and relative standard deviations of 6-10% at concentrations of 20 ng/l were obtained.
本文描述了一种快速测定水样中一丁基锡、二丁基锡和三丁基锡的方法。分析物在置于样品顶空的固相微萃取纤维上同时进行乙基化和富集2分钟。然后，使用多毛细管气相色谱柱结合原子发射检测，仅在90秒内即可分离并选择性定量乙基化产物。描述了空白信号和采样条件对该方法灵敏度的影响。在浓度为20 ng/l时，检测限为1-5 ng/l，相对标准偏差为6-10%。
