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土壤重金屬分析儀儀器特點(diǎn)：
l 前處理簡(jiǎn)單，可直接對(duì)干燥、均勻的粉狀樣品進(jìn)行測(cè)試；
2 軟件內(nèi)置算法可以對(duì)土壤、水系沉積物等不同樣品類型、不同顆粒度、不同含水量等進(jìn)行校正；
3 NX-200S便攜式土壤重金屬檢測(cè)儀能無(wú)任何耗材，無(wú)需液體和氣體輔助，無(wú)需化學(xué)試劑，無(wú)任何廢水廢氣排放；
4 NX-200S土壤重金屬檢測(cè)儀可對(duì)土壤類樣品中鎘（Cd）、汞(Hg)、鉛（Pb）、砷（As）、鉻（Cr）、鎳（Ni）、銅（Cu）、鋅（Zn）等重金屬元素進(jìn)行精確檢測(cè)，擴(kuò)展至錳(Mn)、鈦（Ti）、鋇(Ba）、銣（Rb）、鍶（Sr）、鋯（Zr）、鐵（Fe）等元素的檢測(cè)；
5 采用可更換式鋰離子電池，可用車載電源充電；
6 體積小、重量輕，便于攜帶，可戶外作業(yè)；
7 儀器緊湊，觸摸屏操作，界面簡(jiǎn)潔，使用方便；
8 軟件權(quán)限分級(jí)：管理員模式、操作員模式。

NX-200S便攜式土壤重金屬檢測(cè)儀能有效應(yīng)對(duì)國(guó)標(biāo)GB15618《土壤環(huán)境質(zhì)量 農(nóng)用地土壤污染風(fēng)險(xiǎn)管控標(biāo)準(zhǔn)》限定的八種重金屬檢測(cè)需求，央企品牌，上市公司，品質(zhì)保證！

鋼研納克 NX-200土壤重金屬分析儀
土壤重金屬檢測(cè)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(cè)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(cè)試速度快：Cd精確測(cè)試10分鐘，Hg 、Pb、As、Cr、Ni、Cu、Zn精確測(cè)試為2分鐘；
射線防護(hù)優(yōu)于國(guó)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(cè)試杯，可循環(huán)使用；
單塊電池續(xù)航時(shí)間8~10小時(shí)。