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/>　　上用于農藥殘留快速檢測方法種類繁多，究其原理來說主要分為兩大類：色譜快速檢測法和生化測定法。液相色譜法能夠對大多數農藥進行較為的定量檢測，但是耗時太長，檢測費用過高，限制了其發展。生化檢測法是利用生物體內提取出的某種生化物質進行的生化反應來判斷農藥殘留是否存在以及農藥污染情況，在測定時樣本無需經過凈化，或凈化比較簡單，檢測速度快。生化檢測法中又以酶抑制法和酶聯免疫法應用。酶抑制率法利用了膽堿酯酶對有機磷和氨基甲酸酯類農藥的特異性結合原理，因此檢出限非常低。已被列為標準方法（GB/T5009.199-2003）。由于酶抑制率法具有快速、靈敏、操作簡便、成本低廉等特點，已成為對果蔬中有機磷和氨基甲酸酯類農藥殘留進行現場快速定性初篩檢測的主流技術之一，得到了越來越廣泛的應用。<br /><br />　　農藥殘留檢測儀在一定條件下，有機磷和氨基甲酸酯類農藥對膽堿酯酶正常功能有抑制作用，其抑制率與農藥的濃度呈正相關系。正常情況下，酶催化神經傳導代謝產物（乙酰膽堿）水解，其水解產物顯色劑反應，產生黃色物質，用農藥殘留檢測儀器測定吸光度隨時間的變化值，計算出抑制率，通過抑制率可以判斷出樣品中是否含有有機磷或氨基甲酸酯類農藥的存在。<br />　　 </div> <div id="xlhlxr5" class="ny_PrevNext"> <ul> <li>上一篇：<a href="/wote18-Article-522139/">水質檢測儀的特點</a></li> <li>下一篇：<a href="/wote18-Article-530394/">培養箱使用方法</a></li> </ul> </div> </div> </div> </div>   <div id="rtdxvbl" class="h_foot"> <div id="hzltdzt" class="pz_down"> <div id="t7pj5tp" class="w1200 clear"> <div id="zpblxtd" class="footT"> <div id="lnnxtzf" class="footAddr"> <div id="tlzr57t" class="footTit">南通沃特環?？萍加邢薰?/div> <div id="7vjttbx" 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