为更好地了解甲醇--柴油混合燃料的羰基排放特性,设计了发动机尾气中羰基排放物的检测方法.通过气体捕集、衍生化反应、生成物的洗涤或萃取、高效液相色谱分析技术对尾气中的甲醛、乙醛、丙烯醛、丙醛、丙酮等物质进行了分离测量,分析了检测波长、采样流速、穿透现象对采样效率及分析精度的影响.结果表明,在采样流速2L/min,色谱分析波长360nm时.采用吸附管的采样效率可在94%以上.%In order to understand the carbonyl emission characteristics of methanol-diesel, a detection method for carbonyl emission was designed. Through gas capture, derivative reaction, resultant washing or extraction and HPLC analysis, formaldehyde, acetaldehyde, acrolein, propionaldehyde, acetone and similar substances were separated. The influences of detection wavelength, sampling flow rate and penetration phenomena on sampling efficiency and analysis precision were analyzed. The results show that the efficiency of absorption tubes can be higher than 94％ at the 2 L/min sample flow rate and 360 nm chromatography wavelength,
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