流动注射——氢化物发生原子吸收法测定天然水中的丁基锡化合物

Determination of butyltin compounds in natural waters by flow-injectionhydride generation atomic absorption spectrometry

建立用流动注射——氢化物发生原子吸收法同时测定天然水中一丁基锡、二丁基锡、三丁基锡和四丁基锡化合物的方法。首先用NaBH4还原丁基锡化合物后冷凝富集、加热,氢化物根据沸点的不同依次解吸从而得到分离,由原子吸收法测定。本方法可测每升几十纳克(以锡计)的各种丁基锡化合物。

A method is established through which methylbutyltin, dibutyltin, tributyltin and tetrabutyltin compounds can be determined simultaneously by flow injectionhydride generation atomic absorption spectrometry in this text With this mothod, the butyltin compounds can be deoxidized by sodium borohydride firstly, after being condensated and heated up, the hydride compounds are separated with the way of deabsorption according to the different boiling points of them, then we can determinate them with atomic absorption spectrometry This method can also beused in determinating various butyltin compounds, with a concentration of several tens of nagram per litre (stannum is taken into accounting )