Patent ID: 6074880
Filing Date: 2000-06-13
Classification: B01D,B01L,G01N,Y10T

Abstract:
A system for ejecting a drop of sample analyte containing solution from a flow stream thereof comprising:a. a source of sample analyte containing solution;b. a chromatography column;c. entry pumping means for causing sample analyte containing solution contained in said source thereof to enter, pass through and exit said chromatography column;d. a sample analyte containing flow stream containing means for receiving sample analyte containing solution exiting said chromatography column; in combination with a chamber means for receiving sample analyte containing solution from said sample analyte containing flow stream containing means; said chamber means having an opening therein for entering gas and an opening therein from which a drop of sample analyte containing solution can be ejected;e. exit pumping means for promoting or blocking the exit of sample analyte containing solution caused to be present in said chamber means therefrom; andf. a means for providing a puff of gas into said opening for entering gas in said chamber means;such that in use sample analyte containing solution from said source thereof is caused, by said entry pumping means, to enter said chromatography column, flow therethrough, exit therefrom, enter said sample analyte containing flow stream containing means and into said chamber means, with exit of said sample analyte containing solution from said chamber means being promoted, or blocked, by said exit pumping means, and such that while said sample analyte containing solution is present in said chamber means, a drop thereof can be caused to be ejected from said opening therein from which a drop of sample analyte containing solution can be ejected, by entry of a puff of gas from said means for providing a puff of gas to said opening in said chamber means for entering gas, while optionally causing said exit pumping means to block the exit of sample analyte containing solution caused to be present in said chamber means, therefrom.