气相色谱对气相甲醛的快速测定

应用气相色谱仪,以N_2气为载气,以氢火焰为检测器,并改进进样系统来测定气体甲醛含量。通过标定甲醛,可以直接得到混合气体中气体甲醛浓度。这种方法应用与光催化甲醛浓度的测定和汽车尾气中甲醛浓度测定取得了很好的效果,其准确度可以达到1ppm,最低能够检测5ppm的甲醛气体。

Fast detection of formaldehyde in gases by GC

GC with injection system improved and using N2 as carrier gas and FiD as detector was used to determinate formaldehyde. After formaldehyde was demarcated, the concentration of formaldehde in gases can be got directly .This way was used on concentration of formaldehyed in automobile exhausted gases and photocatalyst reaction well. The veracity was about 1ppm and the lowest detection was about 5ppm.