Author
R.B. Heslop
Bio: R.B. Heslop is an academic researcher from University of Manchester. The author has contributed to research in topics: Precipitation (chemistry) & Isotope dilution. The author has an hindex of 6, co-authored 10 publications receiving 57 citations.
Papers
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TL;DR: The radionuclide phosphorus-32 has been usud to measure the effects of temperature, time of standing, stirring, molybdate-phosphate ratio, hydrochloric, sulphuric, nitric and perchloric acids, and ammonium nitrate on the efficiency of precipitation of ammonium l 2-molybdophosphate as mentioned in this paper.
15 citations
TL;DR: Chromium in aluminium-based alloys has been determined by activation analysis and by isotope dilution using the substoichiometric principle in this paper, where chromium was extracted with tetraphenylarsonium chloride into 1,2-dichloroethane and assayed by measurement of its γ-emission.
10 citations
TL;DR: The conditions for the extraction of phosphate as vanadomolybdophosphate, and the composition of the extract, have been studied with phosphorus-32 and vanadium-48.
9 citations
TL;DR: In this paper, a substoichiometric extraction of vanadomolybdophosphoric acid, followed by measurement of β-emission was used to determine the sulphur content of a sub-milligram quantity of sulphur irradiated for only 8 hours.
7 citations
TL;DR: Extraction into chloroform with substoichiometric amounts of toluene-3,4-dithiol has been studied for the determination of tungsten in this article.
7 citations
Cited by
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TL;DR: This review is a continuation of the previous one and covers the period from October 1983 to September 1985, and finds more than 600 articles that are concerned with the determination of one or more of the elements present in certain organic material.
Abstract: This review is a continuation of the previous one and covers the period from October 1983 to September 1985. During this period the authors found more than 600 articles that are concerned with the determination of one or more of the elements present in certain organic material. Over 90% of the publications deals with samples of complex nature. While no new apparatus was proposed, many papers reported on the evaluation or modification of analytical procedures using the existing equipment, as well as the comparison of various methods for the determination of a single element or simultaneous determination of several elements. 504 references, 2 tables.
50 citations
TL;DR: A review of the substoichiometry in trace analysis is presented in this paper, where the principle of the method, practical applications and recent developments are described, as well as some recent developments.
Abstract: A review of the substoichiometry in trace analysis is presented. The principle of the method, practical applications and recent developments are described.
30 citations
TL;DR: A review of recent developments in substoichiometric analysis is presented and new ideas in this area of study are presented.
24 citations
TL;DR: In this paper, the authors describe a complex reaction between l'oxyde de tri-n -butylphosphine 0.1 M dans le benzene and une solution aqueuse d'acide nitrique de concentration variable ont ete determinees and sont discutees.
20 citations
TL;DR: In this paper, the determination of tungsten in low grade ores and geological samples is one of the most difficult and challenging tasks, since the concentrations are low, instrumental methods are preferred over the classical methods, such as spectrophotometry, fluorometry, atomic absorption spectrometer, atomic emission spectrometry, X-ray fluorescence, neutron activation analysis, electro analytical methods and chromatography.
Abstract: The determination of tungsten in low grade ores and geological samples is one of the most difficult and challenging tasks. Many of the associated elements, especially molybdenum interfere. These have to be overcome by suitable methods of separation or suppression of the interfering elements. Since the concentrations are low, instrumental methods are preferred over the classical methods. Thus spectrophotometry, fluorometry, atomic absorption spectrometry, atomic emission spectrometry, X-ray fluorescence, neutron activation analysis, electro analytical methods and chromatography are preferred. These are discussed in this review.
16 citations