■ 測析方法：能量色散 X 熒光分析方法；
■ 檢測對象：固體、粉末、液體；
■ 測量元素含量范圍：ppm-99.99%；
■ 檢出限：檢出限小于 1ppm；
■ 檢測時間：1-60 秒（一秒可顯示結(jié)果）；
■ 射線防護優(yōu)于國標(biāo)《X 射線衍射儀和熒光分析儀衛(wèi)生防護標(biāo)準(zhǔn) GBZ115-2002》 ；
■ 配備樣品測試杯，可循環(huán)使用；
■ 可選配 84 位自動進樣系統(tǒng)。

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土壤重金屬分析儀能量色散Ｘ射線熒光光譜法測定土壤
１．１ 主要儀器與樣品
能量色散Ｘ射線熒光光譜儀（鋼研納克檢測技術(shù)股份有限公司）；巖石成分分析標(biāo)準(zhǔn)物質(zhì)：ＧＳＲ－５（ＧＢＷ０７１０７）。
１．２ 土壤樣品處理
將采集的土壤樣品混勻后用四分法縮分至約１００ｇ。縮分后的土樣經(jīng)風(fēng)干后，除去土樣樣品中石子和動物殘體等異物，之后將采集的土壤樣品自然風(fēng)干，用瑪瑙研缽研壓，使樣品通過１０目（１ ５００μｍ）的篩，除去砂礫，混勻。之后用瑪瑙研缽研磨樣品使之全部通過１００目（１５０μｍ）篩，混勻后，稱?。常鐦悠罚湃霕悠繁袀溆?。

鋼研納克 NX-200土壤重金屬分析儀能量色散Ｘ射線熒光光譜法測定土壤
１．１ 主要儀器與樣品
能量色散Ｘ射線熒光光譜儀（鋼研納克檢測技術(shù)有限公司）：銠靶光管（功率５０Ｗ，１．５ｍＡ），ＦａｓｔＳＤＤ探測器（在５．８８９ｋｅＶ 處分辨率是１２８ｅＶ）；
ＸＲＦ樣品杯（高度２２ｍｍ，直徑２４ｍｍ，ＣｈｅｍｐｌｅｘＩｎｄｕｓｔｒｉｅｓ）；瑪瑙研缽；標(biāo)準(zhǔn)篩。
土壤成分分析標(biāo)準(zhǔn)物質(zhì)：ＧＳＳ２（ＧＢＷ０７４０２）、
ＧＳＳ３（ＧＢＷ０７４０３）、ＧＳＳ４（ＧＢＷ０７４０４）、ＧＳＳ５
（ＧＢＷ０７４０５ ）、ＧＳＳ６ （ＧＢＷ０７４０６ ）、ＧＳＳ７
（ＧＢＷ０７４０７）、ＧＳＳ８ （ＧＢＷ０７４０８）、ＧＳＳ１２
（ＧＢＷ０７４１２）；水系沉積物成分分析標(biāo)準(zhǔn)物質(zhì)：
ＧＳＤ－３ａ（ＧＢＷ０７３０３ａ）、ＧＳＤ－５ａ（ＧＢＷ０７３０５ａ）、
ＧＳＤ－８ａ（ＧＢＷ０７３０８ａ）、ＧＳＤ－１０（ＧＢＷ０７３１０）、ＧＳＤ－１１（ＧＢＷ０７３１１）、ＧＳＤ－１２（ＧＢＷ０７３１２）；巖石成分分
析標(biāo)準(zhǔn)物質(zhì)：ＧＳＲ－５（ＧＢＷ０７１０７）。