目前,我国还有不少农药的纯度较低,有分离手段的气相色谱法已发展成为农药分析的一种重要手段。而在一般农药气相色谱分析中,常会遇到一系列困难。大多数农药沸点高,蒸汽压低,需在高温条件下才能进行气谱分析。而在较高的柱温下操作,不仅较难控制,且可供选择的固定液少,使工作受到限制;加之许多有机氯,有机磷和有机 At present, there are still many pesticides of low purity in our country, with the separation of gas chromatography has become an important means of pesticide analysis. In the general pesticide gas chromatography, often encounter a series of difficulties. Most pesticides have high boiling points and low vapor pressures, which require gas chromatographic analysis at high temperatures. While operating at higher column temperatures is not only difficult to control, but also provides a small selection of fixatives that limit work; together with many organochlorines, organophosphorus and organic