Improved Method for the Determination of Inorganic Anions in Roselle (Hibiscus sabdariffa L.) by Suppressed Ion Chromatography
نویسنده
چکیده
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, HPO 24,SO 24, and I was accomplished by suppressed conductimetric ion chromatography (IC). The separation is achieved on shim-pack IC-SA2 250 mmL X 4.0 mm ID Peak. column operated at 30°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.
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