SEARCH Articles Figures Tables Electrofocusing in Sucrose Gradient with Voltage Applied During Elution Elution lignin sulfonates with electrolyte Elution of a Narrow Band with Competitive Langmuir Isotherms Elution of a Wide Band With Competitive Langmuir Isotherms Elution with Divalent Cations Elution with Perchloric Acid and Sodium Perchlorate Elution with electrolyte solution Elution with water Elutions with HEDTA Lignin sulfonates elution with electrolyte solution Lignin sulfonates elution with water Molecularly imprinted solid phase extraction with pulsed elution Routine with programmed elution Sulfonated lignins elution with electrolyte solution Sulfonated lignins elution with water