實驗六 Paper Chromatography : Separation of Cations and Dyes

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Paper Chromatography : Separation of Cations and Dyes. Fe 3+ Cu 2+ Ni 2+ 1. Fe 3+ H 2 O 2. Cu 2+ 3 . Ni 2+ dimethylglyoxime R f (rate of flow). - PowerPoint PPT Presentation

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Gravimetric Determination of Phosphorus in Plant Food

Paper Chromatography :Separation of Cations and DyesFe3+Cu2+Ni2+

1.Fe3+H2O 2.Cu2+ 3. Ni2+dimethylglyoxime

Rf (rate of flow)

Rf(Cu)=dCu/ds0.5M0.5M15M1% dimethylglyoxime in ethanol0.5MUnknow sample

50mL100mL

A:Step1.12.5 Cu2+Ni2+Fe3+()Step2.5~7Step3.dimethylglyoximeRfStep4.1~3

B: Step1.15Cu2+Ni2+Fe3+() Step2.600ml10~12mm Step3.dimethylglyoximeRf Step4.1~3

NH3():17.0306 gmol1 m.p:-77.73C b.p.-33.34CCu(NO3)2:187.57 gmol1 m.p:210C b.p.170CNi(NO3)2:290.81 gmol1 m.p:56.7C b.p.136.7C dimethylglyoxime:116.12 gmol1 m.p:240Cethanol:46.1 gmol1 m.p:-114.3C b.p.78.4CFe(NO3)2 :242 gmol1 m.p:47.2C :58.08 gmol1 m.p:-94.9C b.p.56.53C HCl:36.5 gmol1 m.p:27.32C b.p. 110Cisopropyl acohol(C3H8O): 60.10 gmol1 m.p.:-89C b.p.:82.3C