氫化物原子熒光光譜法測定牛奶中砷和汞的含量(已修改)
2025-01-20 09:40 本頁面
【正文】 氫化物原子熒光光譜法同時測定生鮮乳中的砷和汞 摘要 ： 目的 ：運用氫化物原子熒光光譜法以及微波消解技術(shù)測定生鮮乳中的砷和汞。 方法 ： 設(shè)定了詳細(xì)的微波消解步驟，成功的完成了生鮮乳中砷和汞的測定。樣品為農(nóng)業(yè)部奶及奶制品中心的生鮮乳，使用硝酸和過氧化氫消解樣品，達(dá)到了良好的消解效果。在酸性環(huán)境下，砷、汞可以反應(yīng)成氫化物，且能同時測定。 結(jié)果 ： 加標(biāo)回收率為 90%103%。 結(jié)論 ： 此方法具有高度的靈敏性，操作簡便快速，測定結(jié)果精確可靠，檢測結(jié)果和國家規(guī)定標(biāo)準(zhǔn)相統(tǒng)一。 關(guān)鍵詞： 原子熒光法；微波消解；生鮮乳；砷；汞 Microwave digestionhydride generation atomic fluorescence determination of arsenic and mercury in fresh milk Abstract: Objective: Using microwave digestion and atomic fluorescence spertrometry techniques to determine arsenic and mercury in the fresh milk . Method:To establish detailed steps for microwave digestion and ultimately to determine the arsenic and mercury in the two elements for simultaneous determination . The sample is fresh milk from the ministry of agriculture milk and dairy products quality monitoring center .The use of H2O2HNO3 digestion samples,better digestion .In acidic conditions ,arsenic and mercury hydride generated at the same time ,and measure at the same :Recovery of standard addition is 90%103%.Conclusion:The method is sensitive ,easy to operate fast ,accurate and reliable determination of the sample Auricularia arsenic and mercury .Test results are in line with national standards. Keywords: atomic fluresence spectrometry。 microwave digestion。 fresh milk。 As。 Hg 目 錄 前言 ......................................................................................................................................... 1 1 試驗材料 .............................................................................................................................. 1 實驗樣品 ................................................................................................................... 1 實驗試劑 ................................................................................................................... 1 實驗儀器及工作條件 ............................................................................................... 2 2 試驗方法 .............................................................................................................................. 3 樣品預(yù)處理 ............................................................................................................... 3 標(biāo)準(zhǔn)系列制備 ........................................................................................................... 3
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