本文讨论了用窄孔径(50μm I.D.)的毛细管柱气相色谱分析水样中微量有机物。将大容量水样注入能扩散水蒸气的管子,样品被引进窄孔径毛细管柱,柱头调制器对样品进行调制得到浓度脉冲,每个脉冲产生一组色谱图。对一系列快速色谱图进行信号平均化,得到整体样品色谱图。该方法简单,重复性高,不必对样品进行预处理和预浓缩,检测限达1ppb(v/v). This article discusses the analysis of trace organics in water samples using capillary gas chromatography with a narrow pore size (50 μm I.D.). A large volume of water is injected into a tube that diffuses water vapor. The sample is introduced into a narrow-pore capillary column. The sample is modulated by a stigmatic modulator to produce a concentration pulse, each producing a set of chromatograms. Signal averaging a series of flash chromatograms to get the overall sample chromatogram. The method is simple and reproducible, eliminating the need for pretreatment and preconcentration of samples, with a detection limit of 1 ppb (v / v).