Chromatographic systems with pre-detector eluent switching
First Claim
1. 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.
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Abstract
This invention relates to a high efficiency chromatographic system. More specifically, the present invention relates to a chromatographic system for determining the physicochemical properties of one or more compounds using at least two chromatographic units in eluent flow communication with one eluent analyzer via an intermediate eluent switch. The present chromatographic system allows determination of physicochemical properties through the use of multiple chromatographic units in communication with one eluent analyzer via an eluent switch.
91 Citations
21 Claims
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1. 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 comprising
providing 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.
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12. A multi-column chromatographic system comprising
at least two chromatographic columns each having a mobile phase input port and an eluent stream output port; -
a mobile phase delivery system in fluid flow communication with each the mobile phase input port;
an eluent stream analyzer having a fluid sampling port and capable of providing signals characteristic of chemical species in a fluid received in said sampling port;
an eluent switching valve assembly having (1) a fluid input port positioned for 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 the fluid sampling port of the eluent stream analyzer; and
(3) a valve system for directing aliquot volumes of the respective eluent streams and the indexing fluid in a programmed sequence through the fluid output port and toward the fluid sampling port on the eluent stream analyzer;
an electronic data storage device for receiving and storing signals from the eluent stream analyzer representative of analysis of eluent stream aliquots of each respective chromatographic column; and
a programmable controller (computer) including an algorithm including instructions for sensing the presence, volume or components of an indexing fluid aliquot at the fluid sampling port of the analyzer and directing signals from the analyzer for eluent stream aliquots corresponding to the respective chromatographic columns to electronic data storage registers/devices designated for data storage for the respective chromatographic columns. - View Dependent Claims (13, 14, 15, 16, 17, 18, 21)
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Specification