便携式X荧光仪检出限影响因素的研究

杜海燕; 赖万昌; 石希瑜; 陈诚; 胡燕; 赵瑞

doi:10.11889/j.0253-3219.2018.hjs.41.010202

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便携式X荧光仪检出限影响因素的研究

低能加速器技术、射线技术及应用 | 更新时间：2021-05-19

- 便携式X荧光仪检出限影响因素的研究
- Influence factor of the detection limit of portable X-ray fluorescence instrument
- 核技术 2018年41卷第1期文章编号：010202
- 作者机构：
  
  成都理工大学成都 610059
- 作者简介：
  
  [ "杜海燕, 女, 1990年出生, 2015年毕业于烟台大学, 现为硕士研究生, 研究方向为X射线荧光分析与计量", "DU Haiyan, female, born in 1990, graduated from Yantai University in 2015, master student, focusing on X-ray fluorescence analysis and metrology" ]
  赖万昌, E-mail:lwchang@cdut.edu.cn LAI Wanchang, E-mail: lwchang@cdut.edu.cn
- 基金信息：
  
  国家863计划项目(2012AA06180303)
- DOI：10.11889/j.0253-3219.2018.hjs.41.010202
  中图分类号： TL99
- 收稿日期：2016-12-14，
  
  修回日期：2017-07-21，
  
  纸质出版日期：2018-01-10
- 稿件说明：
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杜海燕, 赖万昌, 石希瑜, 等. 便携式X荧光仪检出限影响因素的研究[J]. 核技术, 2018,41(1):010202

Haiyan DU, Wanchang LAI, Xiyu SHI, et al. Influence factor of the detection limit of portable X-ray fluorescence instrument[J]. Nuclear techniques, 2018, 41(1): 010202
杜海燕, 赖万昌, 石希瑜, 等. 便携式X荧光仪检出限影响因素的研究[J]. 核技术, 2018,41(1):010202 DOI： 10.11889/j.0253-3219.2018.hjs.41.010202.

Haiyan DU, Wanchang LAI, Xiyu SHI, et al. Influence factor of the detection limit of portable X-ray fluorescence instrument[J]. Nuclear techniques, 2018, 41(1): 010202 DOI： 10.11889/j.0253-3219.2018.hjs.41.010202.

摘要

讨论了便携式能量色散型X荧光仪检出限受背景扣除方法、管电压与管电流的影响。采用空白样扣本底法、线性本底扣除法、斯托林斯基法（Sterlinski）三种方法扣本底，试验了与之适宜的管电压与管电流范围，比较了三种方法的优缺点。检出限与测定限存在一定的对应关系，利用检出限得到测定限，对低含量的样品进行了定量的分析。为降低检出限值和更准确地测量低含量金属元素在背景扣除方法、测量条件等方面的选择提供参考。

Abstract

Background

The study of the detection limit of X-ray fluorescence instrument is of great significance

as it is widely used in the analysis of low content elements because of its excellent performance.

Purpose

To reduce the detection limit and measuring low content of metal elements more accurately

we provided reference for the choice of background subtraction methods and measurement conditions

etc

Methods

This paper studied the influence factors for the detection limit of the portable X-ray fluorescence instrument

such as background subtraction method

tube voltage and tube current. Blank sample-

linear-and Sterlinski-background subtraction methods were used to subtract the backgrounds and the suitable tube voltage and tube current range were tested. Certain corresponding relationship exists between detection limit and determination limit

so the determination limit was obtained using the detection limit

and the low content samples were analyzed.

Results

Detection limit varies with tube voltage and tube current due to different background subtraction methods. The suitable tube voltage range of blank sample background subtraction is 28-40 kV and tube current range is 18-24mA

while that of linear background subtraction and Sterlinski background subtraction is 24-26 kV

28-40 kV and 12-14 mA

18-40 mA correspondingly.

Conclusion

Blank sample background subtraction is the best

followed by Sterlinski background subtraction

while linear background subtraction is not suitable for the low content element analysis. Each background subtraction method has its suitable tube voltage and tube current range. When the content of elements is equal to the detection limit

the signal of the element detected is reliable

but it can not be used in quantitative analysis.

关键词

Keywords

references

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