ANALYTICAL APPLICATION OF 8-MERCAPTOQUINOLINE (TRIOOXINE) AND ITS DERIVATIVES. COMMUNICATION 18. GALLIUM, INDIUM AND THALLIUM THIOOXINATES. PHOTOMETRIC DETERMINATION OF INDIUM WITH THIOOXINE

Journal Article · Fri Sep 01 04:00:00 EDT 1961 · Zhur. Anal. Khim.

OSTI ID:4834463

Bankovskii, Yu A; Tsirule, Ya A; Ievin's, A F

Crystallione Ga(Ca/sub 9/H/sub 6/NS)/sub 3/, In(C/sub 9/H /sub 6/NS)/sub 3/, and C/sub 9/H/sub 6/NSTI thiooxinates were synthesized. It was established spectroetrically that gallium thiooxinate dfossociatcs in organic solvents with the formation of Ga(C/sub 9/H/sub 6/NS)/sub 2+/ ion. Indium thiooxinate is inclined to the same dissociation, but to a lesser degree. The values of molar extinction coefficients are measured for gallium ( EPSILON -- 8400) and indium ( EPSILON -ll00) thiooxinates in absorbance maxima. The molar extinction coefficient of thallium thfoooxinate is about 4000, and this confirms its suggested composition C/sub 9/H/sub 6/NSTI. Indium and thallium thiooxinates have the same composition both in organic solvent solutions and in the crystal state. Gallium thiooxinate is formed at a ratio Ga: R = l a 2, so, apparently, a complex Ga(C/sub 9/H/sub 6/NS)/sub 2/Cl or a base thioooxinate . In the tenfold excess of thiooxine, in comparison with the amount necessary for the formation of thiooxinatcs, gallium is extracted at pH 6.5--l0, indium at pH 4-l3, and thallium at pH 9--l4. Under like conditions gallium 8-hydroxyquinolfonate is extracted at pH 3.5--ll and indium 8-hydroxyquinolinate at pH 5-l3. A method was developed for the determination of indium with thiooxine (8-mercaptoquinoline). Indium thiooxinate In(C/sub 9/H/sub 6/NS)/sub 3/ is extracted by toluene at pH 4--l2.5. From 0.5to 60 gamma In in 50 ml can be determined. In an alkaline medium considerably prevailing amounts of Cu, Ag, Au, Fe, Co, Ni, Pd, Pt can be masked with potassium cyanfode. Ge, V, As, Mo, W, Re, U, and all the elements which do not form stable sulfides in aqueous solutions do not interfere. Mn, Zu, Hg, Ga, Tl, Sn, Pb, Sb, and Bi interfere. The advantage of the method is the possibility of the determination of gamma -amounts of indium in the presence of highly prevailing amounts of Ag, Au, Pd, Pt without the preliminary separation. The thiooxine method of the determination of indium in an alkaline medium in the presence of potassium cyanide is more selective than the 8-hydroxyquinoline method. (auth)

• Research Organization: Inst. of Chemistry, Academy of Sciences, Riga
• NSA Number: NSA-16-001716
• OSTI ID: 4834463
• Journal Information: Zhur. Anal. Khim., Journal Name: Zhur. Anal. Khim. Vol. Vol: 16
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
ACIDITY
CHEMISTRY
COLOR
CRYSTALS
CYANIDES
DECOMPOSITION
DIAGRAMS
ELEMENTS
GALLIUM COMPLEXES
GALLIUM COMPOUNDS
HYDROXIDES
IMPURITIES
INDIUM COMPOUNDS
INTERACTIONS
IONS
MEASURED VALUES
MOLECULES
NUMERICALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOTOMETRY
POTASSIUM COMPOUNDS
PREPARATION
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
QUINOLINE
QUINONES
SENSITIVITY
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SPECTROMETERS
STABILITY
SULFIDES
THALLIUM COMPOUNDS
TOLUENE
TRACE AMOUNTS
WATER