摘要
使用能量色散X射线荧光光谱法(EDXRF)对土壤中的重金属元素进行检测基本都是针对国家标准中提到的8种重金属,目前土壤中重金属锰的污染也引起了重视。实验采用EDXRF对土壤中的重金属铬和锰进行快速检测,为了提高铬和锰测试结果的准确度,用与之产生吸收增强效应和谱线干扰的元素对土壤中的铬和锰进行校正;使用土壤标准样品绘制校准曲线,校正前铬和锰的线性相关系数分别为0.853和0.717,校正后铬和锰的线性相关系数分别为0.998和0.991,线性明显变好。对一个土壤样品进行精密度考察,铬和锰测定结果的相对标准偏差(RSD,n=11)分别为7.2%和0.66%。用能量色散X射线荧光光谱法对土壤样品中铬和锰进行检测,结果与波长色散X射线荧光光谱法测定结果一致。
The heavy metal elements in soil,which were determined by energy dispersive X-ray fluorescence spectrometry（EDXRF）,usually meant eight heavy metals mentioned in national standard.At present,the pollution of soil by metal element manganese has attracted much attention.Chromium and manganese in soil was rapidly determined by EDXRF.In order to enhance the measurement accuracy of chromium and manganese,they were corrected using the elements which had absorption enhancement effect and spectral interference.The calibration curve was prepared using the standard sample of soil.The linear correlation coefficient for chromium and manganese was 0.853 and 0.717 before correction,respectively,while it increased to 0.998 and 0.991 after correction.The linearity was significantly improved.The precision test was conducted using one soil sample.The relative standard deviation（RSD,n=11）was 7.2% and0.66%,respectively.The content of chromium and manganese in soil sample was determined by EDXRF,and the results were consistent with those obtained by wavelength dispersive X-ray fluorescence spectrometry.
出处
《冶金分析》
CAS
CSCD
北大核心
2016年第10期10-14,共5页
Metallurgical Analysis
基金
科技部国家重大科学仪器设备开发专项(No.2012YQ05007602)
关键词
能量色散X射线荧光光谱法
土壤
铬
锰
energy dispersive X-ray fluorescence spectrometry
soil
chromium
manganese
