作者：薛超群, 郭敏, 张婵
作者单位：青海省柴达木综合地质矿产勘查院测试中心, 青海 格尔木 816000
关键词：超声提取;氢化物发生原子荧光光谱法;碲;土壤样品;价态分析
摘要：
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 g/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。
Determination of different valence tellurium in soil samples by ultrasonic extraction-titanium trichloride reduction-atomic fluorescence spectrometry
XUE Chaoqun, GUO Min, ZHANG Chan
Test Center of Comprehensive Geological and Mineral Exploration Institute of Chaidamu Qinghai, Germu 816000, China
Abstract: 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 TiCl3 reduction 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.
Keywords: ultrasound extraction;hydride generation atomic fluorescence spectrometry;tellurium;soil samples;valence state analysis
2018, 44(4): 53-56 收稿日期: 2017-10-05;收到修改稿日期: 2017-12-19
基金项目:
作者简介: 薛超群(1985-),女,山东威海市人,工程师,主要从事岩矿测试工作。
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