Waters Technologies Corporation

Waters Corporation

Thomas E Wheat

Raymond P Fisk

Charles H Phoebe, Jr

John Lamoureux

Edward R Aig

Uwe Dieter Neue

Richard C Turner

Jean-Michel Plankeele

Mark K Baynham

Amanda B Dlugasch

Isabelle Francois

Patricia McConville

Aparna Chavali

Daniel Root

Guo-Zhong Li

Michael R Jackson

Richard Wayne Andrews

John Heden

Barry Sunray

Dan Root

A chromatography system includes a first chromatography column for receiving and separating a flow stream, a plurality of traps configured to trap a plurality of distinct flow segments exiting the first chromatography column during separation of the flow stream, and a second chromatography column operatively associated with the plurality of traps for receiving and separating the distinct flow segments. The system can include at-column dilution at trapping and separating stages thereof. A chromatography method for operating the chromatographic system includes measuring a plurality of time segments corresponding to a plurality of peaks of a fluid sample flowing through the first chromatographic column, and sequentially fluidly coupling the plurality of distinct flow segments with the corresponding plurality of traps during time segments corresponding to the plurality of peaks.

Multi-dimensional chromatographic system for analyzing multiple sample components

A method of preparing a liquid mixture for use in a liquid chromatography system is provided. The mixture comprises one or more acids, one or more bases, one or more solvents and water, and the method comprises the steps of: calculating pH and/or solvent concentration at a particular time t from a user-determined gradient function; and, based on the values obtained, calculating percent acid, percent base, percent solvent and percent water in the liquid mixture at time t. A liquid chromatography system incorporating such method is also provided.

Methods for preparing liquid mixtures

The present disclosure relates to an enhanced multi-dimensional chromatography system and method using selectable At-Column Dilution to improve compatibility of the interface and transfer between the multiple dimensions. The use of At-Column Dilution ('ACD') with multi-dimensional chromatography can provide greater retention of the diverted components on subsequent stationary phases, and increase the sensitivity and peak shape of the component(s) separated on subsequent dimensions.

Multi-dimensional chromatography system using at-column dilution

A method of preparing a liquid mixture for use in a liquid chromatography system is provided. The mixture comprises one or more acids, one or more bases, one or more salts, and one or more solvents, and the method comprises the steps of: i) calculating pH and/or salt concentration at a particular time t from a user-determined gradient function; and ii) based on the values obtained in step (i), calculating percent acid, percent base, percent salt and percent solvent in the liquid mixture at time t. A liquid chromatography system incorporating such method is also provided.

Process for preparing liquid mixtures of known pH and salt concentration

A method and device for increasing the loading capacity of a chromatography column through dilution of a mobile phase at the head of the column. A strong mobile phase is provided for dissolving a sample. A sample is injected into the strong mobile phase, and subsequently diluted with a weak mobile phase. The resulting sample-containing weak mobile phase is passed through a chromatography column for retention and separation of the components of the sample.

Mobile phase dilution scheme for enhanced chromatography

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Hopedale, MA, United States of America

Thomas E Wheat