扩散法采集个体接触空气中氨

Collection of Personal Exposure to Ammonia in Ambient Air by Diffusion Sampling Monitor

本文采用扩散法将空气中氨采集在磷酸———甘油浸渍的无纺布吸收层上。该法采样速率为１３７６±８４ｍｌ／ｍｉｎ，与动力采样法现场对比测定，总不确定度为±１９３％，。采样器体积小，无噪声，操作方便。

A method for collection of personal exposure to NH3 in ambient air by diffusion collection monitor besed on molecular diffusion has been stadied.The absorbent layer made from a synthefic fiber cloth impregnated dilute H3PO4\|glycerine solution.The sampling rate of NH3 is 137684ml/min.Compared with active device in field,the relative overall uncertainty of diffusion sampling monitor is 193%.The monitor is small,weightlight,simple to operate.It can be used to determine the concentration of NH3 in indoor air and personal NH3 exposures.