便携式X荧光分析仪xrf土壤重金属检测仪重金属分析仪

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（钢研纳克检测技术股份有限公司）；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。

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.

测试速度快：Cd测试10分钟，Hg 、Pb、As、Cr、Ni、Cu、Zn测试为2分钟；
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；
单块电池续航时间8~10小时。