| 摘要 |
The invention concerns a modulator for use in gas chromatographic analyses, specially analyses in two-dimensional gas chromatography, able to alternatively trap and release fractions of solutes in a section of a capillary column inside a gas chromatographic oven, of the type including at least one nozzle disposed in such a way as to spray at least one jet of cryogenic gas on the outside of said section of capillary column. Said nozzle is provided with relative movement as regards said column section, at a controlled speed, at least in the same direction of elution of the analysts inside the column. |
