Measuring and testing – Gas analysis – Gas chromatography
Patent
1977-09-19
1978-11-07
Scovronek, Joseph
Measuring and testing
Gas analysis
Gas chromatography
23232C, 55 67, 210 31C, 427214, 428406, B01D 1508, G01N 3108
Patent
active
041239318
ABSTRACT:
A method is provided for uniformly coating a stationary liquid phase on glass beads, which are then suitable for use as chromatographic column packing, which comprises first contacting the beads with a first solution containing a suitable surfactant in an amount effective to promote the uniform deposition on the beads of the desired liquid phase, said surfactant being selected from the group consisting of (a) a nonionic surfactant, (b) an alkylaryl polyethylene ether phosphate, of the formula ##STR1## and (c) a mixture of nonionic surfactants, and then contacting the beads with a second solution containing a stationary liquid phase, the concentration of said stationary liquid phase in said second solution, the nature of the solvent in said second solution, and the conditions of said second contacting step being selected so that a coating of said statonary liquid phase of from about 0.05 to about 0.5 percent is imparted to said beads. Glass beads coated according to the above procedure represent an advance in the art of chromatography in that columns packed with these beads exhibit improved resolution and component adsorption characteristics.
REFERENCES:
patent: 3944389 (1976-03-01), Solomon
patent: 4042326 (1977-08-01), Kallos
H. L. MacDonell, Anal. Chem., vol. 40, No. 1, pp. 221-224 (Jan., 1968).
E. J. Malec, J. Chromatographic Science, vol. 9, pp. 318-320 (May, 1971).
A. L. German et al., J. Chromatographic Science, vol. 11, pp. 76-82 (Feb., 1973).
Halldorson Burke M.
Scovronek Joseph
The Dow Chemical Company
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