摘要
研究了碘化钾-甲基紫-水体系液-固分离铅(Ⅱ)的行为及其与常见离子的分离条件。结果表明,当0.1mol/L碘化钾溶液和1.0×10-3mol/L甲基紫(MV)溶液的用量分别为0.6mL,0.2mL时,Pb(Ⅱ)能与I-,MV+形成(MV)2(PbI4)沉淀,而Cu(Ⅱ),Zn(Ⅱ),Mn(Ⅱ),Ni(Ⅱ),Cd(Ⅱ),Co(Ⅱ),Fe(Ⅱ),Al(Ⅲ)等离子在此条件下不形成沉淀,实现了Pb(Ⅱ)与这些常见离子之间的定量分离。应用本法对合成水样中微量铅(Ⅱ)进行定量分离测定,结果满意。
The liquid-solid separation behaviour of lead(Ⅱ) with potassium iodide- methyl violet - water system and the conditions for separation of lead(Ⅱ) from other metal ions were studied. The results show that in the presence of 0.6 mL KI (0.1 mol/L) and 0.2 mL MV (1.0 × 10^-3 mol/L) solution,Pb(Ⅱ) can react with Ⅰ - and methyl violet( MV^ + ) to form the settling of (MV) 2 (PbI4), whereas Zn(Ⅱ), Cd(Ⅱ), Cu(Ⅱ), Mn(Ⅱ), Co(Ⅱ) ,Ni(Ⅱ),Fe(Ⅱ),A(Ⅲ) can not in this conditions. Pb(Ⅱ) can be separated completely from these metal ions. This method has been used for the separation of trace of Pb(Ⅱ) in synthetic water samples with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
2006年第5期51-53,共3页
Metallurgical Analysis
关键词
铅(Ⅱ)
液-固分离
碘化钾
甲基紫
lead(Ⅱ)
liquid-solid separation
potassium iodide
methyl violet