论文部分内容阅读
微量的残留量分析方法为采用系列小型仪器及微量技术,较之常量法省工作面、省时间、省劳力、省试剂。 苹果中残留量的测定,如以丙酮或甲醇提取农药,对水分及水溶性提取物如糖分,色素等可用二氯甲烷分配除去,再通过活性炭、硅藻土及硅镁吸附剂的混合层析柱进行净化;也可不净化直接进行色谱测定。作者根据文献对上述二种方法进行了改进及研究,采用GC—NPD选择性检测器、外标峰高法,对七种农药在苹果中的残留量进行了测定。
Trace amount of residue analysis method for the use of a series of small instruments and trace technology, compared to the constant provincial work face, save time, labor and provincial reagents. Determination of residues in apples, such as pesticides extracted with acetone or methanol, water and water-soluble extracts such as sugar, pigment and other available dichloromethane distribution, and then through the activated carbon, diatomite and silica-magnesium sorbent mixed chromatography Column purification; can also be directly purify the chromatographic determination. Based on the literature, the authors improved and studied the above two methods. The GC-NPD selective detector and external standard peak height method were used to determine the residues of seven pesticides in apples.