| 摘要 |
The invention concerns a method supplying volume streams of fluids in channels or capillaries of small stream cross sections, more particularly chromatographic separating columns for the analytical fluid metrology, wherein a delivery device for delivering 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, characterized by the following steps:a) Recording a time reference pressure course using the pressure measuring device in the operating channel, while the delivery device delivers an essentially constant, pre-determinable 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 essentially constant and preferably small operating volume stream through the operating channel, which is different from the reference volume stream, using a pre-determinable mathematical algorithm;c) Delivery of a fluid through the operating channel, wherein the fluid has the same flow properties over time as the fluid used in step a), using the time development of the operating pressure calculated in step b), while the desired work process, more particularly the separation or substance analysis, is performed.
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