Patent ID: 6712085
Filing Date: 2004-03-30
Classification: G01N,G05D,Y10T

Abstract:
A method for the supply of volume streams of fluids in channels or capillaries with small stream cross sections, more particularly in chromatographic separation columns for analytical fluid metrology, wherein a delivery device for the delivery of a volume stream of the fluid through an operating channel and a pressure measuring device for measuring the pressure in the operating channel is provided, wherein a measurement of the volume stream is possible, said method comprising:a) recording a reference time development of the pressure, using the pressure measuring device in the operating channel, while the delivery device delivers a reference volume stream through the operating channel of a fluid with properties, more particularly flow properties, varying over time; b) calculation of a time development of the operating pressure which corresponds to the operating volume stream through the operating channel, which is different from the reference volume stream, using a pre-determinable mathematical algorithm; and c) delivery of a fluid through an operating channel, utilizing the time development of the operating pressure determined in step b), wherein the desired work process is performed.