Patent application number | Description | Published |
20090057227 | LIQUID DELIVERY DEVICE, LIQUID CHROMATOGRAPH, AND METHOD FOR OPERATION OF LIQUID DELIVERY DEVICE - The present invention provides a liquid delivery device for liquid chromatographs which, by performing liquid delivery at an accurate flow rate with limited pulsation, gives accurate results of analyses. The present invention, with a view to preventing erroneous operation due to errors in measurements at the time of judgment of completion of compression of liquid, establishes the judgment point before the pressure measured by a cylinder pressure detector agrees with the pressure measured by a discharge pressure detector and also calculates the point of completion of compression. Control in this manner prevents pressure fluctuation. It also calculates for control the point of completion of compression from the history of compression performed previously. | 03-05-2009 |
20090150091 | CHROMATOGRAPHY DATA SYSTEM - There is provided a user interface which enables all users to input a purpose of use of a chromatography data system, recognize a series of operation flow of the analysis of chromatograph data according to the input purpose, improve an operability and prevent an operation error regardless of the user's knowledge on analyzing the chromatograph data or the user's proficiency in the chromatography data system. In a chromatograph data processing, the present invention relates to recognizing chromatograph data analyzing means on a picture and displaying the chromatograph data analyzing means on the picture in accordance with purpose of use. According to the present invention, the chromatography data system can be easily operated regardless of the knowledge on the analysis of chromatograph data or proficiency in the chromatography data system. | 06-11-2009 |
20090288473 | WAY OF METHOD TRANSFER OF LIQUID CHROMATOGRAPH AND LIQUID CHROMATOGRAPH SYSTEM - When transfer a method from a measurement system of a liquid chromatograph to a measurement system under a condition of a high pressure and a high velocity, an influence due to analysis condition cannot be neglected. Further, since a transfer value obtained by calculation is a logical value, an improper result can be obtained in an actual measurement. Further, since conventional methods are optimized by such as know-how based on previous experiences, how to carry on these know-how to a new method is remained to be solved. | 11-26-2009 |
20110042283 | LIQUID DELIVERY DEVICE, LIQUID CHROMATOGRAPH, AND METHOD FOR OPERATION OF LIQUID DELIVERY DEVICE - The present invention provides a liquid delivery device for liquid chromatographs which, by performing liquid delivery at an accurate flow rate with limited pulsation, gives accurate results of analyses. The present invention, with a view to preventing erroneous operation due to errors in measurements at the time of judgment of completion of compression of liquid, establishes the judgment point before the pressure measured by a cylinder pressure detector agrees with the pressure measured by a discharge pressure detector and also calculates the point of completion of compression. Control in this manner prevents pressure fluctuation. It also calculates for control the point of completion of compression from the history of compression performed previously. | 02-24-2011 |
20120222470 | WAY OF METHOD TRANSFER OF LIQUID CHROMATOGRAPH AND LIQUID CHROMATOGRAPH SYSTEM - Provided is a liquid chromatograph system and method configured to accurately obtain measurements by minimizing deviations in measurements due to a transfer from one measurement method to another measurement method. An aspect of the system and method includes minimizing deviations in measurements when a measurement method from a measurement system of a liquid chromatograph is transferred to measurement system under high pressure and high velocity. Such a transfer includes deviations due to differences in analysis conditions. The present subject matter uses a dwell volume value so as to minimize a deviation of measurement result due to methods before and after transfer. Another aspect includes calculating a correction value when there is a deviation in the measurement result, and automatically reflecting the correction value for the method transfer. | 09-06-2012 |