| 摘要 |
1,116,360. Sample processing. SCIENTIFIC INDUSTRIES, Inc. 1 Sept., 1965 [8 Sept., 1964], No. 37291/65. Headings B1L and B1X. A volatile trace component to be determined, for example by gas chromatography, is separated from a sample consisting principally of an undesired component by placing a reagent 39 which will selectively adsorb or react with the undesired component in the container (17) which has inlet and outlet tubes 25 and 26 and a self seal aperture 27; sweeping an inert gas from source 31 through the container to remove air; injecting the sample through aperture 27; shaking the container by means of a motor in base (11) (Fig. 1 not shown) to bring the sample into contact with reagant 39; and again sweeping the inert gas through the container to sweep the trace component into the outlet tube 26 and hence for example to gas chromatography analyser 35. The container is kept at a constant temperature by means of a heating coil in block (12). If the undesired component is water, reagent 39 may be an anhydrous salt; if it is an alcohol, 39 may be silica gel or a calcium salt; if it is CO 2 or H 2 S, 39 may be an organic or inorganic base; if it is NH 3 or Me 3 N, 39 may be an acid salt. There is reference to determination of volatile constituents such as ethanol, methanol, acetone and isopropanol in blood, and traces of hydrocarbons, oxygen and nitrogen in gaseous CO 2 . |
