对氨基二甲基苯胺光度法测定水中硫化物,提高测定回收率的方法

Approach on the para-amino-aniline photometric method to measure the sulfide in the water for enhancing the recovery rate

对氨基二甲基苯胺光度法（亚甲蓝法）测水中硫化物，预处理过程在常温下进行，预处理时在吸收瓶通气管上加一细口玻璃嘴，处理后水样在吸收瓶中显色，可使预处理回收率达８３％以上。

Through adopted the para-amino-aniline photometric method to measure the sulfide in the water,under the condition of common temperature,it was proved that the water sample in the absorbing bottle could show colour and the recovery rate of preliminary management could reach more than 83 per cent by adding up a thin glass mouth on the gas tube of absorbing bottle during preliminary management.