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.

鋼研納克 NX-200土壤重金屬分析儀
土壤重金屬檢測儀技術(shù)參數(shù)
硬件參數(shù)：
X射線光管：70kV一體化端窗小型X射線管
探測器：原裝進(jìn)口一體封裝，分辨率可達(dá)125eV（5.889keV）
前處理裝置（選配）：干燥裝置、研缽、篩網(wǎng)
電池模塊：DC12V
充電器：AC220V
儀器尺寸：205Wx414Lx263H（mm）
工作環(huán)境：-20~40℃
性能參數(shù)：
測試速度快：Cd精確測試10分鐘，Hg 、Pb、As、Cr、Ni、Cu、Zn精確測試為2分鐘；
射線防護(hù)優(yōu)于國標(biāo)《X射線衍射儀和熒光分析儀衛(wèi)生防護(hù)標(biāo)準(zhǔn)GBZ115-2002》 ；
配備樣品測試杯，可循環(huán)使用；
單塊電池續(xù)航時間8~10小時。

為解決土壤重金屬快檢難題，服務(wù)”土十條”的快速檢測要求，鋼研納克研發(fā)了X熒光土壤重金屬檢測儀NX-200S，土壤重金屬檢測儀可對土壤中鎘元素檢出限低至0.28mg/kg，短三分鐘可檢測26種元素。

測試速度快：Cd精確測試10分鐘，Hg 、Pb、As、Cr、Ni、Cu、Zn精確測試為2分鐘；
射線防護(hù)優(yōu)于國標(biāo)《X射線衍射儀和熒光分析儀衛(wèi)生防護(hù)標(biāo)準(zhǔn)GBZ115-2002》 ；
配備樣品測試杯，可循環(huán)使用；
單塊電池續(xù)航時間8~10小時。