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在标准的交联SE-54毛细管上,准确地测量了20种农药的Kovats指数及温度系数,用以扩充Sadtler标准库。所测农药Kovats指数的温度系数在0.2～1.8指数单位/℃,显示出强极性和高活性,为克服Sadtler标准库对色谱柱和操作条件的苛刻要求,我们试用了保留值活数据库(简称LRD)方法.在程序升温条件下对农药定性。LRD用标准Kovats指数及其温度系数作为基础数据,替代标准样。在不同的程序升温条件下,对农药的实测与LRD计算保留值进行了比较。结果表明,对农药类特殊样品,保留时间的计算精度≤±1％,这证明在程序升温条件下,可用LRD方法对农药分析定性。
The Kovats index and temperature coefficient of 20 pesticides were accurately measured on a standard cross-linked SE-54 capillary to expand the Sadtler standard library. The measured Kovats index of the pesticide showed a temperature coefficient of 0.2 to 1.8 exponential units / ° C, showing strong polarity and high activity. To overcome the stringent requirements of the Sadtler standard library for the column and operating conditions, we tested the retention value live database LRD) Method Qualification of pesticides at elevated temperature. The LRD uses the standard Kovats index and its temperature coefficient as the base data instead of the standard. Under different conditions of programmed temperature, the measured values of pesticides and LRD calculated retention values were compared. The results showed that the calculated precision of retention time for special samples of pesticides ≤ ± 1%, which proves that the LRD method can be used to characterize the pesticide analysis under the conditions of programmed temperature increase.