Eluant perfluorobutyric acid

Fig. 6-45. Gradient elution of various aliphatic quaternary ammonium compounds. — Separator column lonPac NSl (lO-pm) eluant (A) 2 mmol/L perfluorobutyric acid -acetonitrile (80 20 v/v), (B) 2 mmol/L perfluorobutyric acid - acetonitrile (20 80 v/v) gradient linear, 100% A to 100% B in 10 min flow rate 1 mL/min detection suppressed conductivity injection volume 25 pL solute...

Fig. 9-25. Separation of aliphatic carboxylic acids in the seepage water of a sewage sludge dump. — Separator columns (a) Polyspher OA-HY (Merck), (b) lonPac ICE-AS6 (Dionex) column temperatures (a) 45°C, (b) 60°C eluants (a) 5 mmol/L H2SO4, (b) 0.4 mmol/L perfluorobutyric acid flow rates (a) 0.5 mL/ min, (b) 0.5 mL/min detection (a) UV (219 nm), (b) suppressed conductivity injection volumes (a) 20 pL, (b) 25 pL sample preparation OnGuard-P peaks (a) (1) strong acids, (2) pyruvic acid, (3) glyoxylic...

Fig. 9-121. Separation of gluconic acid and citric acid in a weakly basic cleansing agent. - Separator column lonPac ICE-AS5 eluant 1.6 mmol/L perfluorobutyric acid flow rate 0.5 mL/min detection suppressed conductivity injection 50pL sample (1 1000 diluted) solute concentrations J09 g/L gluconic acid (1) and 50g/L citric acid (2).

Fig. 9-136. Ion-exclusion chromatographic separation of lactic acid, acetic acid, and fumaric acid in a pear nectar prior to and after incubation with Rhizopus stolonifer. - Separator column lonPac ICE-AS6 eluant 0.5 mmol/L perfluorobutyric acid flow rate 1 mL/min detection (a) suppressed conductivity, (b) UV (207 nm) sample pear nectar diluted 1 10 with deionized water, incubated sample diluted 1 1000 peaks (1) lactic acid,...

---