Patent ID: 6641783
Filing Date: 2003-11-04
Classification: G01N,Y10T

Abstract:
A method for data acquisition by analysis of eluent streams from multiple chromatographic columns in a chromatographic system using an eluent stream analyzer having a fluid sampling port and capable of providing signals characteristic of detected chemical species in each eluent stream, said method comprisingproviding a chromatoraphic system with multiple chromatograthic columns, each having an eluent stream, and an eluent switching valve having (1) fluid input ports in fluid communication with the eluent stream from each chromatographic column and with a source of at least one indexing fluid, (2) a fluid output port in fluid flow communication with a fluid sampling port on the eluent stream analyzer, and (3) a valve system communicating with a programmable controller for directing aliquots of the respective eluent streams and indexing fluid in a programmed sequence through the fluid output port and toward the fluid sampling port on the eluent stream analyzer, directing the aliquots via the valve system to the eluent stream analyzer and producing signals characteristic of detected chemical species in each aliquot, and correlating the electronic storage of the signals from the analyzer with the programmed sequence so that analyzer signals from analysis of the aliquots of eluent of each respective column are stored in an algorithm accessible electronic storage device.