Radiochemical Determination of Polythionates.

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)...

Radiochemical determination of metallic mercury vapour in air.

A radiochemical method has been developed for the estimation of atmospheric mercury. When air containing mercury is passed through a solution of 203Hg-mercuric acetate and KC1, isotope exchange takes place so that the issuing air contains the same concentration of mercury, but labelled and with the same specific activity as the reagent solution. The 203Hg is absorbed on hopcalite and estimated ...

Radiochemical Techniques

Radiochemical Analysis of Water

This report describes the methods and procedures used by the U.S. Geological Survey Tritium Laboratory to analyze natural waters for tritium activity. Samples having low activity are electrolytically enriched in cells with nickel and steel electrodes, and their tritium concentration is subsequently determined by liquid scintillation and gas phase counting techniques. Samples having high tritium...

Determination of the radiochemical purity of 99mTc- tetrofosmin: Comparison between five methods

METHODS: Nineteen vials of tetrofosmin were radiolabelled with Tc and the percentages of the RCP were determined. Five different methods were compared with the standard RCP testing method (ITLC-SG, 2x20 cm): Whatman 3MM (1x10 cm) with acetone and dichloromethane (method 1); Whatman 3MM (1x10 cm) with ethyl acetate (method 2); aluminum oxide-coated plastic thin-layer chromatography (TLC) plate (...