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气相色谱仪质谱联用仪的进样口一般可用于分流、不分流,脉冲不分流和脉冲分流四种模式分析,分流模式通常用于常量样品分析,而不分流模式用于痕量组分的分析,脉冲不分流/脉冲分流模式与分流/不分流一样,只不过允许进大量样品。由此可看出,对于需要进大量样品的痕量分析,一般应使用脉冲不分流模式。在检案过程中常常遇到用拟除虫菊酯类农药毒鱼案件,此类农药高效、低毒、广谱,对人、畜毒性中等,但对鱼类毒性较大。由于几乎不溶于水,且一般水域面积较大,因
Gas chromatograph mass spectrometer inlets can generally be used for split, splitless, pulsed splitless and pulsed split four mode analysis, split mode is usually used for constant sample analysis, and splitless mode for trace components Analysis, pulsed splitless / pulsed splitter mode, like split / splitless, allows only a large number of samples. From this it can be seen that pulse traceless mode should generally be used for trace analysis that requires large sample volumes. In the process of prosecution, pyrethroid pesticide poisonous fish cases are often encountered. Such pesticides are of high efficiency, low toxicity, broad spectrum, moderate toxicity to humans and animals, but are more toxic to fish. As almost insoluble in water, and the larger the general area of water, due