發(fā)布時(shí)間：2018-05-19 19:00

  本文選題：表面增強(qiáng)拉曼光譜法 + 奶粉　； 參考：《分析科學(xué)學(xué)報(bào)》2017年03期

【摘要】：本文建立了奶粉中同時(shí)檢測三聚氰胺及二聚氰胺的表面增強(qiáng)拉曼光譜法。奶粉樣品經(jīng)15%三氯乙酸溶液提取,中性氧化鋁吸附雜質(zhì)后進(jìn)行拉曼光譜檢測。三聚氰胺線性范圍為0.0050~0.075 mg/L,檢出限為0.0015 mg/L,回收率在79.5%~124%之間,相對標(biāo)準(zhǔn)偏差小于8.8%(n=5);二聚氰胺線性范圍為0.50~10mg/L,檢出限為0.15mg/L,回收率在76.5%~112%之間,相對標(biāo)準(zhǔn)偏差小于9.4%(n=5)。該方法相比常規(guī)表面增強(qiáng)拉曼光譜法,僅通過一種樣品前處理手段即可對奶粉中的三聚氰胺或二聚氰胺進(jìn)行定性檢出及定量分析,相比色譜等檢測方法具有樣品前處理過程簡單、耗時(shí)短等優(yōu)點(diǎn),在奶粉質(zhì)量監(jiān)控方面具有良好的應(yīng)用前景。
[Abstract]:A surface-enhanced Raman spectrometric method for simultaneous determination of melamine and melamine in milk powder was established. Milk powder samples were extracted by 15% trichloroacetic acid solution and then adsorbed by neutral alumina. The linear range of melamine was 0.0050 ~ 0.075 mg / L, the detection limit was 0.0015 mg / L, the recovery was 79.5% and the relative standard deviation was less than 8.8%, and the linear range of melamine was 0.50 ~ 10 mg / L, the detection limit was 0.15 mg / L, the recovery rate was 76.5112% and the relative standard deviation was less than 9.4%. Compared with the conventional surface-enhanced Raman spectroscopy, this method can be used for qualitative detection and quantitative analysis of melamine or dicyandiamide in milk powder by only one sample pretreatment method. Compared with chromatographic methods, it has the advantages of simple sample pretreatment, short time consuming and so on, and has a good application prospect in milk powder quality monitoring.
【作者單位】： 中山大學(xué)化學(xué)學(xué)院;
【基金】：國家重大科學(xué)儀器設(shè)備開發(fā)專項(xiàng)(No.2011YQ03012409) 國家自然科學(xué)基金(No.21277176) 廣東省自然科學(xué)基金重點(diǎn)項(xiàng)目(No.2015A030311020) 廣東省公益研究與能力建設(shè)專項(xiàng)(No.2015A030401036) 廣州市科技計(jì)劃(No.201604020165)
【分類號】：O657.37;TS252.51

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相關(guān)期刊論文 前4條

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本文編號：1911267