氣相色譜法測(cè)定三氯蔗糖中的甲醇?xì)埩袅?/H1>
發(fā)布時(shí)間：2018-07-14 12:16
【摘要】：目的:建立測(cè)定三氯蔗糖中甲醇?xì)埩袅康姆椒ā７椒?采用頂空毛細(xì)管氣相色譜法。色譜柱為DB-624毛細(xì)管色譜柱,柱溫采用程序升溫(初始溫度35℃,保持5 min,以50℃/min升溫至200℃,保持5 min),檢測(cè)器為氫火焰離子化檢測(cè)器。進(jìn)樣口溫度為220℃,檢測(cè)器溫度為250℃,載氣為氮?dú)?流速為2.0 ml/min,分流比為10∶1,頂空溫度為80℃,平衡時(shí)間為30 min,進(jìn)樣量為1 ml。結(jié)果:甲醇質(zhì)量濃度在98.99~296.96μg/ml范圍內(nèi)與峰面積比值呈良好的線性關(guān)系(r=0.999 9);精密度、穩(wěn)定性、重復(fù)性試驗(yàn)的RSD均≤2.16%;平均加樣回收率為100.20%,RSD為0.48%(n=9)。三氯蔗糖最低檢測(cè)限為1.39μg/ml。3個(gè)廠家樣品中有1個(gè)廠家的甲醇?xì)埩袅繛?.12μg/ml,另2個(gè)廠家的甲醇?xì)埩袅康陀谧畹蜋z測(cè)限。結(jié)論:該方法簡便、快捷,適用于三氯蔗糖中甲醇的殘留量測(cè)定。
[Abstract]:Objective: to establish a method for the determination of methanol residues in sucrose trichloride. Methods: headspace capillary gas chromatography was used. The column was DB-624 capillary column. The column temperature was programmed (initial temperature 35 鈩，
本文編號(hào)：2121615
本文鏈接：http://sikaile.net/yixuelunwen/yiyaoxuelunwen/2121615.html
[Abstract]:Objective: to establish a method for the determination of methanol residues in sucrose trichloride. Methods: headspace capillary gas chromatography was used. The column was DB-624 capillary column. The column temperature was programmed (initial temperature 35 鈩，
本文編號(hào)：2121615
本文鏈接：http://sikaile.net/yixuelunwen/yiyaoxuelunwen/2121615.html
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