Ion Exchange SPE
Ion exchange sorbents separate analytes based on electrostatic interactions between the analyte of interest and the positively charged groups on the stationary phase. For ion exchange to occur, both the stationary phase and sample must be at a pH where both are charged.
Read more about this topic: Solid Phase Extraction
Famous quotes containing the word exchange:
“But come what sorrow can,
It cannot countervail the exchange of joy
That one short minute gives me in her sight.”
—William Shakespeare (1564–1616)