在通过多种提取剂的提取能力实验比对后,选择以4 mol/L HCl为提取剂,50℃超声提取,用氢化物发生-原子荧光光谱法测定土壤样品中Te(IV)的含量,在HCl介质中,以TiCl3还原Te(VI),上机测定总Te含量,差减法可得出Te(VI)含量.共存元素的干扰可通过加入三价铁盐消除.在最佳仪器检测及酸度条件下对样品进行测定,此方法回收率为98.0%~110%,方法检出限可达到0.235 μg/L,相对标准偏差2.03%.经实验证实此方法提取效果良好,并具有简便、快速、灵敏度高等优点,有一定的生产实用价值.%After the comparison of the extraction ability of several extractants, an analysis method was established for the determination of Te (IV) in soil samples by hydride generation atomic fluorescence spectrometry. 4 mol/L HCl as the extraction agent in the experiment by ultrasound extraction at 50℃. Determination of total Te content in HCl media with TiCl3reduction Te(VI) and upper machine, then Te(VI) could be counted by subtraction. Eliminated the interference of coexisting elements by joining Fe (III). The recovery of standard addition was 98.0%-110%, and the detection limit was 0.235 μg/L, the relative stand deviation was 2.03%. Experiments showed good results and the method is simple, quick and high tensitivity. It will be of a certain practical value.
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