Determination of rare earth elements, thorium, and chromium with 2-((2-arsenophenyl)azo)-1,8-dihydroxy-7-((2,4,6-tribromophenyl)azo)naphthalene-3,6-disulfonic acid by reversed-phase ion-pair liquid chromatography
Journal Article
·
· Anal. Chem.; (United States)
The separation and determination of rare-earth elements (RE), thorium, and chromium by reversed-phase ion pair liquid chromatography have been demonstrated. A precolumn chelating-formation method was used. 2-((2-Arsenophenyl)-azo)-1,8-dihydroxy-7-((2,4,6-tribromophenyl)azo)-naphthalene-3,6-disulfonic acid was used as the chelating reagent. The stationary phase of the column was packed with 9-11 ..mu..m YWG-C18 ODS (250 x 4.0 mm i.d.) and the mobile phase consisted of a CH/sub 3/CH-H/sub 2/O-ion pair (tetrabutylammonium, TBA/sup +/) solution. A gradient eluent program was used to change the concentration of CH/sub 3/CN, and the detection wavelength was 635 nm. The linear scale for the metals ions was (0.02-5.0) x 10/sup -6/ M (RE/sub x/O/sub y/), (0.01 - 3.5) x 10/sup -6/ M (Th), and (0.02 - 4.0) x 10/sup -5/ (Cr), respectively. A detection limit of 0.1 ng (20 ..mu..L injected) was achieved for each metal with a relative standard deviation of less than 6.0%.
- Research Organization:
- Wuhan Univ. (China)
- OSTI ID:
- 7013782
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 60:18; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
ACTINIDES
AROMATICS
CHELATES
CHELATING AGENTS
CHROMATOGRAPHY
CHROMIUM
COMPLEXES
CONDENSED AROMATICS
DATA
ELEMENTS
ELUTRIATION
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
LIQUID COLUMN CHROMATOGRAPHY
METALS
NAPHTHALENE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
QUANTITY RATIO
SEPARATION PROCESSES
SULFONIC ACIDS
THORIUM
TRACE AMOUNTS
TRANSITION ELEMENTS
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
ACTINIDES
AROMATICS
CHELATES
CHELATING AGENTS
CHROMATOGRAPHY
CHROMIUM
COMPLEXES
CONDENSED AROMATICS
DATA
ELEMENTS
ELUTRIATION
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
LIQUID COLUMN CHROMATOGRAPHY
METALS
NAPHTHALENE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
QUANTITY RATIO
SEPARATION PROCESSES
SULFONIC ACIDS
THORIUM
TRACE AMOUNTS
TRANSITION ELEMENTS