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
为解决土壤重金属快检难题，钢研纳克X荧光土壤重金属分析仪NX-100S，NX-100S土壤重金属分析仪能有效应对国标GB15618《土壤环境质量 农用地土壤污染风险管控标准》限定的八种重金属需求，短三分钟可26种元素。
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。
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.
钢研纳克 NX-200土壤重金属分析仪能量色散Ｘ射线荧光光谱法测定土壤
１．１ 主要仪器与样品
能量色散Ｘ射线荧光光谱仪（钢研纳克技术股份有限公司）；岩石成分分析标准物质：ＧＳＲ－５（ＧＢＷ０７１０７）。
１．２ 土壤样品处理
将采集的土壤样品混匀后用四分法缩分至约１００ｇ。缩分后的土样经风干后，除去土样样品中石子和动物残体等异物，之后将采集的土壤样品自然风干，用玛瑙研钵研压，使样品通过１０目（１ ５００μｍ）的筛，除去砂砾，混匀。之后用玛瑙研钵研磨样品使之全部通过１００目（１５０μｍ）筛，混匀后，称取３ｇ样品，放入样品杯中备用。
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