Recovery Of CHA In Air

The results showed that the recovery rate of cyclohexylamine in workplace air by ion chromatography was 93.3%-94.0%,RSD was 3.2%-5.6%. The desorption efficiency was 97.93%-99.30%. The sampling efficiency was 99.90%-100.00%. The peak time of K+,Na+ and Li+ was 3.7-4.0 min, the peak time of Ca2+ and Mg2+ was 4.0-6.0 min, and the peak time of cyclohexylamine was 8.7min. The content of cyclohexylamine in the air of the workplace at the sampling site was 2.2-3.5 mg/m3. It can be seen that the ion chromatography needle has a high value in the detection of air cyclohexylamine in the workplace, with high accuracy and recovery rate, high desorption efficiency and sampling efficiency, and is not easy to be interfered by other easily eluted cations.