Preparation of fused-silica columns with phases immobilized by cobalt-60 gamma radiation; application to essential oil analysis

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5681762

Hubball, J A

Cobalt-60 gamma-radiation was used to immobilize polymeric stationary phases in fused silica capillary columns for gas chromatography. Surface studies of the uncoated fused silica tubing by optical and scanning electron microscopy indicated some irregularities, but overall the tubing maintained its strength and flexibility at dosages up to 25 MRads. A polydimethylsiloxane phase (OV-1) and a polyethylene glycol phase (Carbowax 20 M) were effectively immobilized on the inner surface of fused silica capillary tubing without altering the properties of the phases. The optimum radiation dosage for OV-1 was 7 MRads, while Carbowax 20 M required 25 MRads to immobilize 33% of the coated layer. Fused silica capillary columns prepared with both phases were evaluated for deactivation, efficiency, and thermal stability. Immobilization of Carbowax 20 M extended the low and high temperature limits by 30 C in each direction. Columns prepared in this study were used to analyze the essential oil of Siparuna guianensis. Several key components of the oil were identified by GC/MS and gas chromatographic techniques.

• Research Organization: Connecticut Univ., Storrs, CT (USA)
• OSTI ID: 5681762
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
10 SYNTHETIC FUELS
ESSENTIAL OILS
STRUCTURAL CHEMICAL ANALYSIS
EXTRACTION COLUMNS
FABRICATION
COBALT 60
GAMMA RADIATION
GAS CHROMATOGRAPHY
MASS SPECTROSCOPY
MECHANICAL PROPERTIES
OPTICAL MICROSCOPY
PERFORMANCE TESTING
POLYETHYLENE GLYCOLS
POLYMERS
RADIATION DOSES
SCANNING ELECTRON MICROSCOPY
SILICA
ALCOHOLS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHALCOGENIDES
CHROMATOGRAPHY
COBALT ISOTOPES
DOSES
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
EXTRACTION APPARATUSES
GLYCOLS
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MICROSCOPY
MINERALS
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
OILS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RADIOISOTOPES
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
TESTING
YEARS LIVING RADIOISOT
400102* - Chemical & Spectral Procedures
090110 - Hydrocarbon Fuels- Properties- (1979-1989)