Radiochemical separations by amalgam exchange

Anion-exchange separations of metal ions in thiocyanate media.

The analytical potential of a weak-base macroreticular anion-exchange resin for the quantitative separation of metal ions in thiocyanate media is investigated and demonstrated. Distribution data are given for the sorption of some 25 metal ions from aqueous mixtures of potassium thiocyanate (1.0M or less) and 0.5M hydrochloric acid. The magnitude of the distribution data suggests many possible s...

Faster Separations Using Agilent Weak Cation Exchange Columns

Optimizing Protein Separations with Agilent Weak Cation-Exchange Columns

Columns containing weak cation-exchange stationary phases offer a degree of versatility when used for separation of positively charged proteins. Of particular interest, is the difference in selectivity that can be obtained by adjusting the pH of the mobile phase eluent. We explore the parameters of interest and how these can be changed to optimize the resolution of the compounds of interest usi...

Determination of Mercury by Radiochemical Displacement Methods

1-(2-Pyridylazo-2-naphthol), PAN, has been introduced and extensively employed as a reagent in radioanalytical chemistry in our laboratories. An earlier communication dealt with the determination of micro amounts of Cu(II) by displacement of labelled zinc from Zn-PAN complexl'. The present work is intended to develop a similar method employing Zn-PAN complex for the determination of mercury(II)...

Cadmium analysis by radiochemical neutron activation analysis.

Radiochemical neutron activation analysis (RNAA) has been routinely used at the National Bureau of Standards to analyze Cd in a variety of environmentally important matrices. The method used to separate Cd from other neutron-activated products is solvent extraction. Zinc diethyldithiocarbamate [Zn(DDC)2] in chloroform will quantitatively extract Cd from an aqueous solution over a pH range from ...