Zero-order and first-derivative spectrophotometric determination of trace amounts of ruthenium after extraction of its ion association complex with 2,4,6-tris(2 prime -pyridyl)-1,3,5-triazine and picrate
- Univ. of Chile, Santiago (Chile)
A solvent extraction-spectrophotometric determination of trace amounts of ruthenium has been developed, based on the formation of an ion association complex of ruthenium (III) with 2,4,6-tris(2{prime}-pyridyl)-1,3,5-triazine as primary ligand and picrate as counter-ion; this complex is then extracted into 1,2-dichloroethane. The complex is formed at pH 2.0-7.0, upon heating at 90 C for 60 min, and the ruthenium concentration can be determined by measuring the absorbance directly in the organic phase. Beer's law is obeyed over the concentration range 1.0-10.0 {mu}g ml{sup {minus}1} corresponding to 0.050-0.500 {mu}g ml{sup {minus}1} of ruthenium in the aqueous solution. The apparent molar absorptivity and the Sandell's sensitivity were found to be 3.4 {center dot} 10{sup 5} 1 mol{sup {minus}1} cm{sup {minus}1} and 0.30 ng cm{sup {minus}2}, respectively. The interference of various ions was examined and the serious interferences from iron and other metals of the VIII group were minimized by employing the derivative spectrophotometric technique in conjunction with appropriate masking agents.
- OSTI ID:
- 7037769
- Journal Information:
- Analytical Letters; (United States), Journal Name: Analytical Letters; (United States) Vol. 25:9; ISSN ANALB; ISSN 0003-2719
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
ABSORPTION SPECTROSCOPY
AZINES
CHARGED PARTICLES
CHEMICAL ANALYSIS
COMPLEXES
DATA
ELEMENTS
EXPERIMENTAL DATA
EXTRACTION
HETEROCYCLIC COMPOUNDS
INFORMATION
INTERFERING ELEMENTS
IONS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PLATINUM METALS
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
RUTHENIUM
RUTHENIUM COMPLEXES
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS