Solid-phase extraction (SPE) is a sample preparation technique used to isolate and concentrate specific analytes from a mixture by using a solid adsorbent material. This method is crucial for enhancing the sensitivity and specificity of analytical techniques, especially in microfluidic systems, where small sample volumes are common. SPE allows for the selective removal of unwanted components, which can improve the accuracy of diagnostic results in lab-on-a-chip applications.
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