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Autor:
R.B. Heslop, Ann.C. Ramsey
Publikováno v:
Analytica Chimica Acta. 47:305-314
The conditions for the extraction of phosphate as vanadomolybdophosphate, and the composition of the extract, have been studied with phosphorus-32 and vanadium-48. Reproducible extractions can be made with substoichiometric amounts of molybdate; such
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c00c50c7a1604f564e4ab4126c549b50
https://doi.org/10.1016/s0003-2670(01)95682-x
https://doi.org/10.1016/s0003-2670(01)95682-x
Autor:
E.F. Pearson, R.B. Heslop
Publikováno v:
Analytica Chimica Acta. 33:522-531
The radionuclides phosphorus-32, arsenic-74, iron-59 and molybdenum-99 were used to determine the effect-of arsenate and some transition-metal ions on the precipitation of phosphorus as ammonium 12-molybdophosphate. Under the conditions necessary for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65d5655970e45e68f0e0c88650bc30f4
https://doi.org/10.1016/s0003-2670(01)84934-5
https://doi.org/10.1016/s0003-2670(01)84934-5
Autor:
R.B. Heslop, S.K. Tay
Publikováno v:
Analytica Chimica Acta. 47:183-188
Sulphur can be determined in fluorocarbon polymers and other fluorine compounds by neutron irradiation to convert sulphur-32 to phosphorus-32 by the (n,p) reaction. The phosphorus produced is determined by a substoichiometric extraction of vanadomoly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::193d23c3b2e60927f6c1db6830265ed9
https://doi.org/10.1016/s0003-2670(01)95666-1
https://doi.org/10.1016/s0003-2670(01)95666-1
Autor:
N.K. Baishya, R.B. Heslop
Publikováno v:
Analytica Chimica Acta. 50:209-217
Extraction into chloroform with substoichiometric amounts of 8-hydroxyquinoline and cupferron has been used for the determination of molybdenum in germanium dioxide. The effect of interfering metal ions on both methods of extraction has been studied.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c236d079a48f2a49df57c059a7ff088b
https://doi.org/10.1016/0003-2670(70)80058-7
https://doi.org/10.1016/0003-2670(70)80058-7
Autor:
R.B. Heslop, J.W. Lethbridge
Publikováno v:
Journal of Chromatography A. 13:199-202
The separation of peroxomonophosphoric acid from orthophosphoric acid by anion-exchange chromatography is described; also the recovery of peroxomonophosphoric acid from the acetate buffer solution used as eluate.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f6e9b8ce21f995c2253036dd64b72e0
https://doi.org/10.1016/s0021-9673(01)95093-9
https://doi.org/10.1016/s0021-9673(01)95093-9
Autor:
D.R. Ellis, R.B. Heslop
Publikováno v:
Analytica Chimica Acta. 41:361-373
The radioisotope carbon-14 was used to study the retention of carbon in the decomposition of alkyl- and arylchlorosilanes by wet methods. Losses by sample volatilisation were overcome by preliminary cooling in dry ice. Fuming sulphuric acid alone or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11d9f9ee3422cb59c3b1c9c3e39ef49e
https://doi.org/10.1016/s0003-2670(01)80407-4
https://doi.org/10.1016/s0003-2670(01)80407-4
Autor:
N.K. Baishya, R.B. Heslop
Publikováno v:
Analytica Chimica Acta. 51:69-76
Chromium in aluminium-based alloys has been determined by activation analysis and by isotope dilution using the substoichiometric principle. Chromium, separated by oxidation to dichromate followed by solvent extraction, was substoichiometrically extr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79ba21361e18d183de7f1435908f5346
https://doi.org/10.1016/s0003-2670(01)81833-x
https://doi.org/10.1016/s0003-2670(01)81833-x
Autor:
E.F. Pearson, R.B. Heslop
Publikováno v:
Analytica Chimica Acta. 37:516-524
The precipitation of phosphate with quinolinium molybdate was studied by means of radioactive tracers, in relation to the excess of reagent, temperature of precipitation, etc. Precipitation is almost quantitative (99.3%) even with a stoichiometric am
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0ed0b0b133c8f38998e9d99589f5f50
https://doi.org/10.1016/s0003-2670(01)80715-7
https://doi.org/10.1016/s0003-2670(01)80715-7
Publikováno v:
Analytica Chimica Acta. 30:450-459
The radionuclide phosphorus-32 has been usud to measure the effects of (I) temperature, (2) time of standing, (3) stirring, (4) the molybdate-phosphate ratio, (5) hydrochloric, sulphuric, nitric and perchloric acids, and (6) ammonium nitrate on the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::411704d84e066de803f1e204b4ae6902
https://doi.org/10.1016/s0003-2670(00)88748-6
https://doi.org/10.1016/s0003-2670(00)88748-6