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Article
Variable isotopic composition of lead as a source of systematic error in proton activation analysis
This paper considers the variable isotopic composition of lead as a possible source of systematic errors in proton activation analysis. The importance of this source of error was evaluated for environmental an...
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Article
Determination of lead in copper by proton activation analysis
A novel method for the determination of lead in copper by proton, activation analysis has been developed. The bismuth activity formed was, separated from the matrix activity by anion exchange chromatography. S...
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Article
Determination of cadmium, thallium and lead in environmental samples by proton activation analysis
Cadmium, thallium and lead are determined in environmental samples using the111,112,113Cd(p,xn)111In,203Tl(p,3n)201Pb and206,207,208Pb(p,xn)206Bi reactions.111In.201Pb and206Bi are chemically separated by anion e...
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Article
The determination of lead in environmental and geological materials by proton activation analysis
Lead is determined in environmental samples and in rocks using the206,207,208Pb(p,xn)206Bi reaction. Bismuth is separated by anion exchange or by extraction with antimony diethyldithiocarbamate. Sources of errors...
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Article
Thermal behaviour of rock and environmental samples during proton irradiation
The temperature in powdered rock and environmental samples irradiated with 23 MeV protons was measured. Under helium (3–9·105 Pa) the obtained temperature is considerably lower than under vacuum. Irradiation unde...
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Article
Grey cast iron reference material certified for antimony, arsenic, bismuth, and lead
200 kg graues Gußeisen mit Zusätzen von Sb, As, Bi und Pb wurden in Form von 80 Stangen hergestellt, die in Scheiben zerschnitten wurden (Durchmesser 32 mm, Dicke 10 mm). Homogenitätstests innerhalb und zwisch...