FIELD: test and measurement equipment.
SUBSTANCE: invention relates to devices for introducing gaseous samples into a gas chromatograph. Planar microdoser contains channels for a fixed volume of the dose and connecting gas flows, switching of which is carried out by two 3-way pneumatic distributors with electric control. Channels for gas flows are made by micro milling on a flat plate of the Peltier element, serving both for heating and cooling the microdoser, and the temperature controller maintains the fixed temperatures of the microdoser to change the amount of gas in the sample dosed to the chromatograph for analysis.
EFFECT: invention can be used for the quantitative analysis of multicomponent complex mixtures in various industries: chemical, oil, gas, food, medicine, ecology, etc.
1 cl, 4 dwg, 1 tbl
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| FLOW CHROMATOGRAPH | 2011 |
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