Analysis of MetaIs by SoIid-Liquid Separation after Liquid-LiquidExtraction. -Spectrophotometric Determination of Aluminum and Iron after Extraction of Their Oxinates with Molten Naphthalen-

摘要

A method of 1iquid-1iquid extraction of aluminum and iron oxinates with moltennaphthalene followed by solid-1iquid separation is successfully app1ied to theanalysis of the micro amounts of aluminum and iron(III). The complex formedbetween metal and oxine is easi1y extracted into molten naphthalene. Afterextraction，the very fine so1idified naphthalene crystals are dissolved in dimethylformamide，and the absorbance of the solution is measured at the given wavelengthagainst the reagent blank. Beer's law is obeyed for 5-55μg of aluminumor 5-80μg of iron in 10mℓ of dimethylformamide. Effects of the various factorssuch as pH amounts of reagent and naphthalene were studied，and the molarabsorptivity，s ensitivity and relative standard deviation calculated.