毛细管柱气相色谱法测定小麦粉中过氧化苯甲酰  

Capillary Column GC Determination of Benzoyl Peroxide in Wheat Flour

作　　者：李新华[1] 赵岷[1] 寇登民[2] 张静[2] 张媛媛[2] 张黎黎[2] 

机构地区：[1]辽宁渤海大学化学系,锦州121003 [2]南开大学化学系,天津300071

出　　处：《理化检验（化学分册）》2007年第8期655-657,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：辽宁省教育厅科学研究计划资助项目(2021401159)

摘　　要：合成了对甲苯磺酸三正丁铵,并以二氯甲烷为溶剂,用静态法涂敷于石英毛细管色谱柱上(30 m×0.53 mm i.d.,液膜厚度为1.2μm)作为气相色谱的固定相,对柱性能进行了考察。试验表明:此色谱固定相极性较强,对于小麦粉中过氧化苯甲酰有独特的分离作用,在3个不同的浓度水平上作方法的精密度试验,得到的相对标准偏差值在1.1%～5.0%之间,线性范围为10～100 mg.L-1(r=0.994),检出限为2.0 mg.kg-1;方法的回收率为90.5%～95.0%。Tri-n-butylammonium-p-toluenesulfonate was prepared and its solution in dichloromethane was applied statically to silica capillary column （i. d. 0.53 min× 30 m） with 1.2 μm in liquid membrane thickness, which was used as stationary phase in gas chromatography. As shown by the results of performance test, relatively strong polarity and specific capability for separation of benzoyl peroxide from wheat flour were manifested by this stationary phase. In its application to the C-C-determination of benzoyl peroxide in wheat flour, precision was tested on 3 different concentration levels, giving values of RSD＇ s （n = 5） in the range of 1.1% - 5. 0 %. Linear relationship between the peak area and concentration of benzoic acid was found in the range of 10 to 100 nag · L^-1 （r=0. 994）, with a detection limit of 2. 0 mg· kg^-1. Recovery test was made and the results obtained were in the range of 94. 3%-96. 6%.

关 键 词：毛细管柱气相色谱 对甲苯磺酸三正丁铵 过氧化苯甲酰 小麦粉 

分 类 号：O657.7[理学—分析化学]