一般检查砷多用古蔡氏法使溴化汞试纸产生黄至棕色的斑痕,但不能避免锑化物与磷化物的干扰,尤其是作未知样品时,会影响判定结果的正确性。这里介绍一个简单的鉴别方法。 1.将有斑痕的试纸放在盛有浓盐酸的瓶口上,如斑痕先转为灰黑色、继而消失的、是砷 General inspection of arsenic with ancient Chua’s method to mercury bromide test paper to produce yellow to brown marks, but can not avoid the interference of antimonides and phosphides, especially for unknown samples, will affect the accuracy of the determination results. Here is a simple identification method. 1. The test strips with a scar on the bottle filled with concentrated hydrochloric acid, such as the first mark turned gray gray, and then disappear, is arsenic