品牌钢研纳克
型号NX200s
仪器类型便携式
元素28种
分析时间3min
钢研纳克 NX-200土壤重金属分析仪测定土壤中铬和锰的干扰校正
（１．钢铁研究总院，北京１０００８１；２．钢研纳克技术有限公司，北京１０００９４）
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，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，结果与波长色散Ｘ射线荧光光谱法测定结果一致。钢研纳克 NX-200土壤重金属分析仪
关键词：能量色散Ｘ射线荧光光谱法；土壤；铬；锰；钢研纳克 NX-200土壤重金属分析仪
Multi-elemental Analysis by NCS NX-200 Energy Dispersion X-ray Fluorescence Spectrometry and Its Application on the Traceability of Soybean
Origin
a College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China
b Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China
Accepted:
Feb. 6, 2020; Published: Feb. 25, 2020.
Considering the lower analytical sensitivity, numerous ED-XRF manufacturers are committed to improve the instrumental performance.37 For example, the NX-100S ED-XRF from NCS Testing Technology Co., Ltd.(Beijing, China) have been reported to detect Cd in soil and food samples as low as < 0.1 mg kg-1. These ED-XRF instruments can be attached to a car or be loaded into a special suitcase for on-site use with a battery.
Therefore, in this work, a miniaturized ED-XRF was used for the multi-elemental analysis of soybean samples from five main producing areas in northern China (the
Heilongjiang, Liaoning, Inner Mongolia, Xinjiang, and Henan provinces) after establishing instrumental optimization and calibration. To analyze the analytical
results, the multi-layer perceptron belonging to artificial neural network was carefully studied and utilized to establish a provenance model. The ED-XRF proved to be
effective and efficient to measure micro and trace multi-elements for the fast identification of soybean origin.
土壤重金属测定仪是一款土壤重金属快速仪器。该土壤重金属测定仪可以土壤中的多种重金属元素，如Pb、Cd、Hg、As、Cu、Cr6+、Al、Zn等金属元素，还具有速度快，准确度高等特点。主要用于土壤中重金属元素工作，在土壤污染调研、研究中有着重要的应用。
■ 测析方法：能量色散 X 荧光分析方法；
■ 对象：固体、粉末、液体；
■ 测量元素含量范围：ppm-99.99%；
■ 检出限：检出限小于 1ppm；
■ 时间：1-60 秒（一秒可显示结果）；
■ 射线防护优于国标《X 射线衍射仪和荧光分析仪卫生防护标准 GBZ115-2002》 ；
■ 配备样品测试杯，可循环使用；
■ 可选配 84 位自动进样系统。
http://xjr003.cn.b2b168.com
