Gas chromatographs for determination of trace amounts of oxygenates to oil fractions

摘要

The invention relates to the field of analytical chemistry, in particular to a chromatography is used to determine trace amounts of oxygenates in petroleum fractions.; The object of the utility model is to provide a new device -Gas chromatograph with achievement of the following technical result: an adaptation device under two documents, the development of a gas circuit using tap switch for implementing backflushing precolumn.; Gas chromatograph to determine trace amounts of oxygenates in petroleum fractions contains eight-port valve switch, the first port is connected to the input node, a second port connected to the entrance to the capillary precolumn, the fourth and eighth ports connected devices fine adjustment of the flow, to the third and seventh port controllers are connected through the carrier gas purification device is connected to the fifth output port of the capillary precolumn, a sixth port connected to the analytical capillary column, yield of which is connected to a flame ionization detector.