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
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), Vol. 60:18
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHROMIUM
LIQUID COLUMN CHROMATOGRAPHY
THORIUM
CHELATES
CHELATING AGENTS
ELUTRIATION
EXPERIMENTAL DATA
NAPHTHALENE
QUANTITY RATIO
SULFONIC ACIDS
TRACE AMOUNTS
ACTINIDES
AROMATICS
CHROMATOGRAPHY
COMPLEXES
CONDENSED AROMATICS
DATA
ELEMENTS
HYDROCARBONS
INFORMATION
METALS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
SEPARATION PROCESSES
TRANSITION ELEMENTS
400105* - Separation Procedures
400102 - Chemical & Spectral Procedures