Polarographic determination of thorium(IV) with 3-hydroxypyridine-2-thiol

Sindhu, R. S.; Pandeya, K. B.; Singh, R. P.

doi:10.1007/bf00470138

Cited by 3 publications

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“…DIRECT RADIOMETRIC METHODS Five isotopes of thorium are found in natural materials: 234 Th, 232 Th, 230 Th (ionium), 228 Th, and 227 Th and are components of all three of the naturally-occurring radioactive decay series (Table IV). Most radiometric methods for thorium involve either direct measurement of radiation (alpha or beta) with or without separation of the isotopes, or more commonly, neutron activation analysis.…”

Section: Comparative Studiesmentioning

confidence: 99%

“…Tracks or stars from particles undergoing further disintegrations can be specific for individual nuclides. In a typical application /285/, 232 Th was determined from the number of tracks of appropriate length and 228 Th from the number of five-pointed stars. As little as 0.1 Mg 2 32 Th could be detected by this procedure.…”

Section: Particle Track Registrationmentioning

confidence: 99%

“…228 Th may also be measured by alpha spectrometry /30, 249/ and may be deposited electrolytically /249/. The emanation from 232 Th, 220 Rn (thoron) /257/ may be extracted from thorium-containing samples such as rocks and minerals and has a half life of 54.5 s which is sufficiently different from that of the other two isotopes 222 Rn (3.3 d) and 219 Rn (actinon -3.9 s), that the three may be distinguished from each other.…”

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confidence: 99%

See 2 more Smart Citations

The Analytical Chemistry of Thorium

Ryan¹,

Brooks²,

Zhang³

1981

Reviews in Analytical Chemistry

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Section: Comparative Studiesmentioning

confidence: 99%

Section: Particle Track Registrationmentioning

confidence: 99%

mentioning

confidence: 99%

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The Analytical Chemistry of Thorium

Ryan¹,

Brooks²,

Zhang³

1981

Reviews in Analytical Chemistry

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Polarographic determination of gallium(III) with 3-hydroxypyridine-2-thiol

1983

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Analytical Reactions of Hydroxypyridines

Sharma¹,

Sindhu²

1989

Reviews in Analytical Chemistry

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152 I. IX. 3-NITROSO-2,6-PYRIDINEDIOL (NPD) 173 X. ETHYL-2,4-DIHYDROXY-3-NITROSONICOTINATE (EDHN) 174 XI. HYDROXYPYRIDINE ACIDS AND AMINE 174 XII. SCHIFF'S BASES DERIVED FROM 3-HYDROXYPYRIDINE-2-ALDEHYDE 175 CONCLUSION 176 REFERENCES 178 151 Brought to you by | Purdue University Librari Authenticated Download Date | 5/31/15 7:18 AM SUMMARY Some analytical aspects of the chemistry of hydroxypyridine compounds up to and covering the year 1986 are reviewed. 152 Brought to you by | Purdue University Librari Authenticated Download Date | 5/31/15 7:18 AMHydroxypyridines have been successfully used as sensitive and in many cases selective reagents employing several analytical techniques e.g. spectrophotometry, polarography, potentiometry, fluorimetry, chromatography and solvent extraction /29/. These aspects are reviewed in this article up to and covering the year 1986. II. 2,3-DIHYDROXYPYRIDINE (DHP) DHP was first prepared by Kudernatsch in 1897 /30/ by the alkali fusion of 3-hydroxypyridine. After that, many other methods have been explored for its synthesis /31 -37/ and it has also been found as the by-product in many other syntheses /38-43/. Its characteristics, along with other hydroxypyridines, are presented in Table 1.DHP converts tetrahydrofurans into quarternary ammonium compounds having antibacterial action /44/. This has biological importance also /45,46/. It is very active against salmonella dysentery group bacilli /45/ and is an important intermediate in the bacterial metabolism of the pyridine ring /46/. Spinner and White studied the spectra and ionization constants of substituted 2-hydroxypyridines /47/ including DHP and those of cations and anions of the compounds /48/. The acid dissociation constants of the cationic and neutral species of DHP have been evaluated more precisely and in concentration terms /49/. The stepwise deprotonation of DHP takes place as follows:The overall stability constant of its complex with Fe(III) in 1 .OM HCl has been evaluated. The composition of the complex appears to be FeClHP and the values of the conditional stability constant comes out to be 12.13 with a standard deviation of 0.06. Stability constants of 1:1 bivalent metal complexes with DHP have been determined by Goel et al /50/ in aqueous and 50% dioxan media using the Potentiometrie method. They follow the order: 154 Brought to you by | Purdue University Librari Authenticated Download Date | 5/31/15 7:18 AM Brought to you by | Purdue University Librari Authenticated Download Date | 5/31/15 7:18 AM 157 Brought to you by | Purdue University Librari Authenticated Download Date | 5/31/15 7:18 AM

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Polarographic determination of thorium(IV) with 3-hydroxypyridine-2-thiol

Cited by 3 publications

References 1 publication

The Analytical Chemistry of Thorium

The Analytical Chemistry of Thorium

Polarographic determination of gallium(III) with 3-hydroxypyridine-2-thiol

Analytical Reactions of Hydroxypyridines

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