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. ■ 操作简便，一键傻瓜式测试； ■ 方便携带，可实现普通轿车车载运输； ■ NX-200土壤重金属分析仪可以对土壤中的重金属元素进行测试； ■ 前处理简单，可直接对土壤样品进行检测； ■ NX-200土壤重金属分析仪*任何耗材； ■ 批量检测，可以与多达 84 位的自动进样器联用。 土壤重金属检测仪NX-200 NX-200可对土壤、水系沉积物等样品类型中20多种重金属元素进行快速测试和筛查，仪器具有前处理简单、操作简便、便于携带，自带锂离子电池，可户外作业等特点。 NX-200S便携式土壤重金属检测仪能有效应对国标GB15618《土壤环境质量 农用地土壤污染风险管控标准》限定的八种重金属检测需求，央企，上市公司，品质保证！
