β Scribed by Cheng, K. L.
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π SIMILAR VOLUMES
Microgram quantities of hunk or fulvic acid are quantitatively adsorbed on a small amount (ca. 1 ml) of pulverized Amberlite XAD-2 and XAD-8 resins. A sodium hydroxide solution, aqueous ammonia, or a mixture of methanol and aqueous ammonia leads to very low desorption recoveries of the bumic substan
A procedure is described in which gold and palladium are quantitatively recovered from anode slimes using a short column .with Amberlite XAD-7 resin, followed by their spectrophotometric determination as bromo complexes. Their separation was carried out in 0.4 M NaBr, 0.01 M K!XN and 0.05 M HNO, med
XAD resms are widely used to Isolate aquatlc humlc substances In this work the molecular adsorptlon and subsequent desorptlon of a sod humlc acid on XAD-2, 4, -7 and -8 was studled Gel permeation chromatography estabhshed that size-exclusion effects were operative, large humlc molecules (MW > 30000)