原子荧光光谱法测定土壤和沉积物中铋

发布时间：2019-01-06 12:39

【摘要】：建立了王水沸水浴消解-原子荧光光度法测定土壤和沉积物中铋。优化了仪器参数、载流及还原剂浓度,比较了水浴消解、微波消解和电热板消解三种前处理方式处理土壤/沉积物中铋的优劣。实验表明,最佳的消解方式为水浴消解,该方法操作简单方便,结果准确,可靠。采用王水沸水浴消解土壤或沉积物试样,方法的检出限为0.01mg·kg~(-1)(取样量为0.500 0g,定容体积为50mL),检出下限为0.04mg·kg~(-1)。该方法测定土壤标准样品,测定值都在标准值范围之内,相对误差为-4.7%~-2.0%。该方法用于测定土壤和沉积物实际样品的相对标准偏差分别为2.5%~3.4%和3.1%~3.4%,加标回收率分别为97.6%~102%和99.5%~104%。
[Abstract]:The determination of bismuth in soil and sediment by atomic fluorescence spectrophotometry with Wang Shui boiling water bath digestion was established. The parameters of instrument, current carrying and reducing agent concentration were optimized, and the advantages and disadvantages of water bath digestion, microwave digestion and electrothermal plate digestion were compared in the treatment of bismuth in soil / sediment. The experimental results show that the best digestion method is water bath digestion. The method is simple and convenient, and the results are accurate and reliable. Using Wang Shui boiling water bath to remove soil or sediment samples, the detection limit of the method is 0.01mg kg~ (-1) (sampling amount is 0.500 g, constant volume is 50mL), and the detection limit is 0.04mg kg~ (-1). The determination of soil standard samples by this method is within the range of standard values, and the relative error is -4.7 ~ 2.0. The relative standard deviations of this method for the determination of actual soil and sediment samples were 2.5% and 3.4%, respectively. The recoveries of the added standard were 97.610 2% and 99.5%, respectively.
【作者单位】：湖南省环境监测中心站国家环境保护重金属污染监测重点实验室;广电计量检测(湖南)有限公司;北京师范大学水科学研究院;
【基金】：环保公益性行业科研专项重点防控重金属关键先进监测技术适用性研究项目(201309050)资助
【分类号】：X830;O657.3

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