Ag-DDC光度法测砷的研究

Study on Determination of Arsenic by Ag-DDC Spectrophotometric Method

中文关键词:  Ag-DDC光度法  测砷  影响因素

英文关键词:Ag-DDC spectrophotometric method  Arsenic determination  Affecting factors

中文摘要:

      研究了Ag-DDC分光光度法测复杂体系砷过程中,试液中氮氧化物、醋酸铅脱脂棉湿润度、吸收液温度等因素对砷测定的影响。结果表明采用Ag-DDC分光光度测砷,在试液中加硝酸消解时,氮氧化物极难赶尽,对砷的测定有负干扰;半干燥的醋酸铅脱脂棉对硫化氢的吸收更加充分;吸收液温度对测量有一定的影响,吸收液的吸光度会随温度的升高而降低。

英文摘要:

      Some affecting factors including nitrogen oxides,absorbent cotton humidity of lead acetate,and temperature of absorption,on arsenic determination in complex system by Ag-DDC spectrophotometric method were studied in this paper.The results showed that the nitrogen oxides was difficult to be dispeled when using nitric acid to digest sulfide,which had negative interference on the arsenic determination.The hydrogen sulfide was absorbed much sufficiently by semi-dry absorbent cotton of lead acetate.The temperatu...