Abstract
An electron-capture detector which utilizes promethium-147 as the ionization source has been studied for its use in pesticide analysis. A method has been found to electroplate promethium-147 on gold foils which can be heated to 400 without appreciable loss of activity. The properties of the foil as an ionization source are comparable to those of nickel-63. The detector has been used to analyze pesticides in aqueous media in the range 0.1 too p.p.b. 1 1 Throughout the paper the British (10°) billion is meant.
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