System for enriching a probe substance for spectroscopic applications in flow-injection analysis

摘要

An arrangement for the enrichment of sample substance for spectroscopic purposes in the flow injection analysis contains first pump means (10) for conveying a sample and a buffer liquid and second pump means (12) for conveying an eluting liquid. The elements to be determined are retained by an ion exchange column (72) and can be eluted from the eluting liquid. A dosing capillary (64) is used to enter the sample into a furnace (88) of an atomic absorption spectrometer (78). Valve means (30) in a first valve position provide the first end of the ion exchange column (72) with the first pumping means (10) and the second end of the ion exchange column (72) with a waste outlet (62) and the metering capillary (64) with a source of one Displacement pressure fluid connected. In a second valve position, the second end of the ion exchange column (72) is connected to the second pumping means (12) and the first end is connected to the metering capillary (64).