Page 206 - Analytical method for food addtives

E297: Fumaric acid and its salts 137

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Voltammetric or polarographic instrument scanning up to 3.0 volts Conductivity and UV

Prepare a standard curve by plotting numerical values of solutions against µg fumaric acid/mL Preseparation was run in first capillary at pH 6.1 of leading electrolyte (LE). The pH of (LE) in second capillary 2.5, with β-cyclo- dextrin added. The terminating mM caproic electrolyte (TE) was 5 acid mM HCl+β-alanine+5 mMβ-UV

Make a test solution in methanol. Dilute test solution (5 mL) to 25 mL with electrolyte solution Sample (100 mg) was dissolved in M NaOH (500 mL) Sample (5 µL) injected directly or after dilution (10x) via sampling valve

Feed additives 0.1 Apple juice

Foods

Polarographic Two-dimensional cITP cITP–CZE