摘要
铅精粉试样经硫酸、硝酸溶解,在1.5%的硫酸介质中,分取双份试样,其中一份加入适当的还原剂使五价砷还原为三价砷后加入混合显色剂显色磷,另一份加入等体积混合显色剂,实现砷磷合量的测定。小体积直接比色,砷磷合量的吸光度减去磷的吸光度就为砷的吸光度,通过绘制砷的标准曲线从而实现砷的测定。
Leading powder sample dissolved in sulfuric acid nitric,1.5 % sulfuric acid medium,took the double sample.One to add the appropriate reductant,pentavalent arsenic reduction to trivalent arsenic then add to mixed color reagent chromogenic phosphorus;Another sample add an equal volume of mixed color reagent,chromogenic arsenic phosphorus levels of total.Small volume of direct colorimetric,total absorbance minus the absorbance of the phosphorus,according to the standard curve of arsenic arsenic results.
出处
《广东化工》
CAS
2012年第6期215-216,共2页
Guangdong Chemical Industry
关键词
铅精粉
小体积
砷
lead powder
small volume
arsenic
