Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1987-04-30
1989-04-04
Spitzer, Robert
Glass manufacturing
Processes
Forming product or preform from molten glass
55386, 65 34, C03B 2320, B01D 1508
Patent
active
048182648
ABSTRACT:
A multicapillary gas chromatography column comprising a bundle of single capillary columns each of which have essentially the same internal diameter and which are coated with essentially the same thickness of essentially the same stationary phase so that each column has essentially the same standard retention factor. A method of producing such a column is to cut a single fused silica capillary column into a number of essentially equal lengths and then to bundle the lengths together. Each bundle end can then be inserted into, for example, a graphite ferrule and then the multicapillary column can be conventionally installed into a gas chromatograph. The multicapillary column of the invention has the injection, detection and sample capacity advantages of a relatively large diameter capillary column with the speed and resolving power of a relatively narrow diameter capillary column.
REFERENCES:
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patent: 4424127 (1984-01-01), Roeraade
patent: 4451365 (1984-05-01), Sattler et al.
patent: 4657742 (1987-04-01), Beaver
Aleksander Janik, "Multicapillary Columns", J. of Chromatographic Science, vol. 14, 12/76, 589.
H. D. Pierce, Jr. et al., "Technical Note: A Method for the Preparation of Glass Multicapillary Columns", vol. 17, J. of Chromatographic Science, 5/79, 297.
Walter Jennings, "Gas Chromatography with Glass Capillary Columns, 2 Ed.", Academic Press, 1980, 34-35.
Spitzer Robert
Stevens Timothy S.
The Dow Chemical Company
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