摘要
前人已经报道用汞的冷原子吸收法测定硫化物,利用Hg2+和S2-形成很稳定的化合物,使汞的吸光度值降低,根据其降低的程度来测定硫化物的含量。这种方法简便、灵敏,但对加入的Hg2+量有较大的限制。S2O32-、CN-、I-等也有严重干扰,这些离子常与S2-共存于水样中,所以,实际测定时,常需分离这些离子。
An indirect method for the determination of sulfide was developed. The method is based on the cold mercury vapor atomic absorption spectrometry (CMVAAS). Sulfide(S2-) was first transformed into mercury sulfide precipitation by reacting with mercury ion(Hg2 + ) in an aqueous solution and then was determined indirectly by measuring mercury content in the precipitate by CMVAAS. It was shown that the method is sensitive and quite specific. The method has been conveniently employed to determine sulfide in natural water.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第5期537-539,共3页
Chemical Journal of Chinese Universities
关键词
硫化物
硫化汞
冷原子吸收法
Cold mercury vapor atomic absorption spectrometry, Sulfide, Mercury sulfide
