System for separating an analyte from a sample

A system for separating an analyte from a sample, comprising:

• a separator configured to separate the analyte from the sample;
• an analyser configured to obtain measurements indicative of a quantity of the analyte in the sample, wherein the analyser is downstream of the separator;
• a bypass line configured to provide a first fraction of the sample to the analyser for measurement without passing through the separator;
• and
• a controller configured to:
• receive a measurement obtained by the analyser on the first fraction of the sample received via the bypass line, the measurement indicating that the first fraction of the sample received via the bypass line comprises a threshold quantity of the analyte;
• and
• control activation of the separator based on the received measurement;
• wherein the system is configured to provide a second fraction of the sample to the analyser without passing through the bypass line and is configured such that the first fraction of the sample arrives at the analyser before the second fraction of the sample arrives at the separator.