将膜分离技术与流动注射分析相结合 ,采用聚四氟乙烯疏水性微孔膜 ,使样品流与接受液流进行物理分离。通过测定含有显色剂的接受液流吸光度的变化来测定 p CO2 ,初步建立海水中p CO2 流通式光度测定方法。该方法的相对标准偏差小于 1.2 %,与气相色谱法相比 ,无显著性差异。整个实验仅需 11min,样品用量不到 10 m L,操作简便、快速。 Combining membrane separation with flow injection analysis, a polytetrafluoroethylene hydrophobic microporous membrane is used to physically separate the sample stream from the receiving stream. P CO2O2 was determined by measuring the change in absorbance of the receiving stream containing the developer, and a preliminary photometry method of pCO2 in seawater was established. The relative standard deviation of this method was less than 1.2%, which was not significantly different from that of gas chromatography. The entire experiment only 11min, the sample amount less than 10 m L, easy to operate, fast.