Eluents fumaric acid

Fig. 3-87. Separation of maleic acid and fumaric acid. — Separator column IonPac AS4A eluent 0.0017 mol/L NaHC03 + 0.0018 mol/L Na2C03 flow rate 2.0 mL/min detection UV (210 nm) injection 50 pL solute concentrations 2 ppm maleic acid and 5 ppm fumaric acid.

Several other organic acids have been used as eluents in anion chromatography. These include succinic, nicotinic, salicylic, fumaric and citric acid [14]. One objective was to find an eluent that is not adsorbed by the resin matrix and that attains equilibrium faster than benzoic acid. The following organic acids, listed in order of their increasing eluting power for sample anions, attain equilibrium fairly rapidly nicotinic, succinic, citric, fumaric, salicylic. 

Figure 10.208 Ion-exclusion chromatography eluent 5mmol/L H2SO4 detection UV of organic acids in a freshly squeezed grape (210nm) sample freshly squeezed Italian juice utilizing UV detection. Separator column grape juice peaks (1) tartrate, (2) malate, and Shim-pack IE column temperature 60°C (3) fumarate (see [311]).

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