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食用植物油中残留的六号溶剂国标法采用顶空外标色谱法测定,此法误差来源较多,直接影响分析结果的准确性。本文采用顶空内标校准曲线法,以正庚烷为内标物,测定食用植物油中六号溶剂残留量,得到满意的结果。材料和方法1．仪器与试剂:岛津GC—14B气相色谱仪,FID检测器,C—R6A数据处理机;恒温水浴箱;微量进样器;平衡瓶:标度为100ml的盐水瓶经标定容积为130ml,并具橡胶反口塞;六号溶剂标准溶液:在100ml容量瓶中加入约90ml无色谱干扰的色拉油,加入适量六号溶剂,换算成每ml溶液中含六号溶剂的mg数;正庚烷<分析纯>。
Edible vegetable oil residue on the 6th solvent GB method using headspace chromatography, the error source more, a direct impact on the accuracy of the analysis results. In this paper, headspace internal standard calibration curve method, with n-heptane as the internal standard, determination of edible vegetable oil solvent No.6, the results were satisfactory. Materials and methods 1. Instruments and Reagents: Shimadzu GC-14B Gas Chromatograph, FID Detector, C-R6A Data Processor; Thermostatic Water Bath; Micro Injector; Balancing Bottle: A calibrated volume of 100 ml saline bottle is 130 ml and No.6 solvent standard solution: Add about 90ml chromatographic interference salad oil in a 100ml volumetric flask, add the appropriate amount of solvent No. 6, and convert it to the mg number of solvent No. 6 in every ml of solution; n-heptane .