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四、天然产物的负离子化学电离质谱负离子化学电离(CI)质谱近几年发展迅速,并由于它的灵敏度较高而引起人们的重视。这一新技术可用于研究离子-分子反应和痕量有机物的定性定量分析。 Dougherty等~([16])用这一技术测定尿中残留的五氯苯酚.Hunt等~([17])报道,用氧作为反应气时,2,3,7,8-TCDD的检测量可达pg级。对各种氟取代的化合物,检测量可低于100 fg(10~(-13)g)~([18])。
Fourth, the natural product of negative ion chemical ionization mass spectrometry Negative ion chemical ionization (CI) mass spectrometry has developed rapidly in recent years, and because of its high sensitivity and aroused people’s attention. This new technology can be used to study qualitative and quantitative analysis of ion-molecular reactions and trace organic compounds. Dougherty et al. [16] measured pentachlorophenol in urine using this technique. Hunt et al. ([17]) reported that the detection of 2,3,7,8-TCDD when using oxygen as the reagent gas Up to pg level. For a variety of fluorine-substituted compounds, the detection of less than 100 fg (10 ~ (-13) g) ~ ([18]).