Reinsch氏首先发现铜片置粗制盐酸中,有砷沉积在铜片上。其后Wormley氏发现绨离子在同样情况下析出锑,并获得八面结晶体的升华物,Gray氏证实砷、锑、汞、铋等四种离子都能在铜片上析出,Drinkwater氏发现硒离子亦能能析出。Lucas及Sydney Smith等指出,当有机质存在时,也能在盐酸酸性溶液中检出这些金属,还可以避免因破坏有机质而引起金属毒的损失。后来学者将析出金属毒的铜片进行升华,置显微镜下观察,可见到汞滴或三氧 Reinsch first discovered that the copper plate was placed in crude hydrochloric acid, and arsenic was deposited on the copper plate. Later, Wormley discovered that cerium ions precipitated cerium in the same situation and obtained eight-sided crystalline sublimate. Gray’s confirms that four ions, such as arsenic, antimony, mercury and antimony, can be precipitated on the copper sheet. Can be precipitated. Lucas and Sydney Smith pointed out that when organic matter is present, these metals can also be detected in acidic hydrochloric acid solution, and metal poisoning damage caused by the destruction of organic matter can also be avoided. Later, the scholars will sublimate the metallized copper flakes and observe them under a microscope. Mercury drops or trioxygen can be seen.