Zobrazeno 1 - 10
of 88
pro vyhledávání: '"H. J. M. Bowen"'
Autor:
R. Al-Merey, H. J. M. Bowen
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Letters. 153:221-234
Rare earth elements have been determined in Syrian phosphate rocks by two methods: inductively coupled plasma atomic emission spectrometry following a cation separation, and instrumental neutron activation analysis using both short and long irradiati
Autor:
Vincent P. Guinn, H. J. M. Bowen
Publikováno v:
C R C Critical Reviews in Analytical Chemistry. 10:127-184
1. PRINCIPLES AND MATHEMATICAL FORMULATION The principle of activation analysis is that elements can be made radioactive by exposure to radiations such as neutrons, protons, or high-energy photons. Two physical processes, prompt and delayed, are asso
Autor:
A. J. Leach, H. J. M. Bowen
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Letters. 128:103-107
Rhodium/III/ solutions react with tin/II/ chloride to form a short-lived yellow complex which is extracted by polyurethane foam. Iridium/IV/ solutions are decolourised by tin/II/ chloride but the metal is poorly extracted by foam. The rhodium/III/ co
Autor:
J. Albaigés, B. H. Woolen, W. C. Pearce, Roger Wood, J. H. P. Tyman, B. I. Brookes, W. M. Edgar, Roger M. Smith, H. J. M. Bowen, B. G. Henshaw, R. Perry
Publikováno v:
The Analyst. 112:711-715
Publikováno v:
Journal of Radioanalytical Chemistry. 48:9-16
Radio-tracer experiments have shown that antimony, mercury and zinc interact to form complexes with humic and/or fulvic acids, whose molar masses can be estimated by gel chromatography. Sb(III) and (V) humates are stable in the pH range 7–11, but a
Publikováno v:
Journal of Radioanalytical Chemistry. 45:417-421
A rapid non-destructive activation analysis method has been developed for the determination of antimony. A high resolution low energy Ge detector is used to measure the 61.6 keV γ-ray from122mSb (T=4.2 min). Sensitivities and detection limits for bi
Autor:
H. J. M. Bowen
Publikováno v:
The Lichenologist. 8:1-33
Autor:
H. J. M. Bowen
Publikováno v:
Journal of Radioanalytical Chemistry. 19:215-226
Les milieux biologiques etalon pour une analyse elementaire sont peu nombreux et posent des problemes d'homogeneite, de conditions reproductibles, de sechage et de stokage. Leur usage a souleve un certain nombre de problemes concernant la surete de c
Autor:
M. Omar, H. J. M. Bowen
Publikováno v:
Journal of Radioanalytical Chemistry. 74:273-282
Tin(II) and tin(IV) are absorbed from aqueous solutions by Sephadex G-25 gel, from which they can be eluted by humates or fulvates, with which they interact more strongly. Methyltin species are not absorbed by Sephadex G-25, and so can be separated f
Autor:
H. J. M. Bowen
Publikováno v:
The Lichenologist. 12:199-237
Thames and its tributaries. In this paper names refer to the Watsonian vicecounties 22 (Berks), 23 (Oxon) and 24 (Bucks), and recent boundary changes are neglected. The altitudinal range is from 17 to 292 m, and the region includes both scarp and dip