As the sample of N 2H 4,MMH and UDMH mixture gas in air is collected by sampling tube for concentration MMH,the concentration of N 2H 4,MMH and UDMH is measured simultaneously by spectrophotometer.

• 介绍了用一甲肼浓缩采样管采集空气中三肼混合气体，用分光光度法分别测出肼、一甲肼和偏二甲肼各组分的含量。