Metrohm Inline-Ultrafiltration - Manual (Page 11)

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2 Overview
IC equipment: Inline-Ultrafiltration
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2.4 Mode of operation for ultrafiltration
The peristaltic pump delivers a continuous flow of sample solution at a
high rate through the lower chamber of the ultrafiltration cell. The sample
flows along the filtration membrane and then to the waste container.
At the same time, the peristaltic pump's second channel generates a vac-
uum in the upper chamber of the ultrafiltration cell, thus pulling the sam-
ple solution through the filtration membrane. The filtrate reaches the sam-
ple loop and is then injected.
Less than 20% of the original sample solution volume is analyzed as fil-
trate. The remainder flows directly into the waste container.