| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: method involves extraction of drilling fluid in an extractor in order to continuously obtain a stream of extracted gases at the output of the extractor, containing the analysed hydrocarbons and at least one spurious compound which is not water and is more polar than the analysed hydrocarbons. The gas stream is then carried from the extractor over a transfer line into a separation column to separate the analysed hydrocarbons depending on their elution time in the separation column. Further, successive detection and/or determination of the amount of each analysed hydrocarbon is carried in a detector located at the output of the separation column. One or each spurious compound can have elution time in the separation column ranging from the elution time of the first analysed hydrocarbon in the separation column to the elution time of the last analysed hydrocarbon in the separation column. The method also involves passing the gas stream through a surface for chemical and/or physical interaction with the spurious compound which is in contact with gases between the output of the extractor and the input of the separation column, for selectively holding said spurious compounds without delaying the analysed hydrocarbons and so as to prevent washing-off of the spurious compounds in the separation column. ^ EFFECT: high accuracy of qualitative and quantitative evaluation of analysed hydrocarbons, and high rate of analysis. |
