石蜡相光度法测定银的研究  

Determination of Silver by Paraffin Phase Spectrophotometry

作　　者：龚涛 万益群[2] 

机构地区：[1]南昌高等专科学校工程系,江西南昌330009 [2]南昌大学化学系,江西南昌330047

出　　处：《江西师范大学学报（自然科学版）》2004年第5期409-410,共2页Journal of Jiangxi Normal University(Natural Science Edition)

摘　　要：研究了银(Ⅰ)与碘化钾-抗坏血酸-罗丹明B显色体系在石蜡相中的显色反应.在一定量硝酸存在下,石蜡能定量吸附此络合物.采用双波长光度法测量固相吸光度差值,银的含量在0～0.4mg/L范围内符合比耳定律,从而建立了银的石蜡相光度分析法.方法用于铅锌矿废渣中银的测定,结果满意.The colour reaction of silver and potassium iodide-ascorbic-acid-Rhodamine B in phase has been studied. The complex can be quantitatively absorbed in paraffin phase at some nitric acid. The absorbance of the solid phase was measured by using dual wavelength spectrophotometry. Beer's law is obeyed in the range of 0～0.4 mg/L of silver. The new method has been applied to the determination of silver in plumbum and zincum mine with satisfactory results.

关 键 词：石蜡 双波长光度法 固相 硝酸 研究 络合物 吸附 光度分析法 显色反应 罗丹明B 

分 类 号：N94[自然科学总论—系统科学] O657[理学—分析化学]