Abstract
A smpile, rapid and accurate method for the determination of main mono and divalent inorganic anions in Roselle (Hibiscus sabdariffa L.) has been developed. The quantitative determination of anions F-, Cl-, NO2-, Br-, NO3-, HPO42-, SO42-, and I-was accomplished by suppressed conductimetric ion chromatography (IC).
The separation is achieved on shim-pack IC-SA(2) 250 mmL X 4.0 mm ID Peak. column operated at 30 degrees C within 12.21 minutes by isocratic elution with 1.8 mM potassium carbonate, 12 mM Potassium bicarbonate and 0.0125mM of N- {[(ethylamino) thioxomethyl] hydrazine carbonlmethyl} trimethyl ammonium chloride (ETHTC) and pH 9.25 as eluent at flow rate of 1ml/min. The method does not need a special sample treatment.