Comparative Study on the Potassium and Citrate Content of Calamansi (Citrus microcarpa bunge), Dalandan (Citrus auratium), and Pomelo (Citrus grandis osbeck) with Potassium Citrate Tablets (Acalka®)

Comparative Study on the Potassium and Citrate Content of Calamansi (Citrus microcarpa bunge), Dalandan (Citrus auratium), and Pomelo (Citrus grandis osbeck) with Potassium Citrate Tablets (Acalka®)
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Title:Comparative Study on the Potassium and Citrate Content of Calamansi (Citrus microcarpa bunge), Dalandan (Citrus auratium), and Pomelo (Citrus grandis osbeck) with Potassium Citrate Tablets (Acalka®)
Author/Abstract:
John Kenneth B. Domingo MD and Rico Y. Sampang MD

Section of Urology, Department of Surgery, University of Santo Tomas Hospital

Objective: To determine the potassium and citrate content of the local citrus fruits: calamansi, dalandan and pomelo in comparison with potassium citrate tablets (Acalka®). Materials and Methods: One kg by weight of each fruit was sent to the University of Santo Tomas Herbarium for authentication. Samples were sent to the Industrial Technology Development Institute of D.O.S.T. for quantitative studies of potassium using atomic absorption spectrophotometry and citrate using high performance liquid chromatography. Results: Citric acid content % weight by weight: calamansi 5.97; dalandan 1.63; pomelo 0.41. Potassium (K) content in mg/kg: calamansi 178; dalandan 509; pomelo 296. Each 1080 mg of Acalka® contains 390 mg of potassium and 690 mg of citrate. Conclusion: The potassium and citrate content of potassium citrate tablets (Acalka®) are superior in comparison with the fruits analyzed. Fruits cannot be used as monotherapy but can be used as adjuncts with commercially prepared potassium citrate tablets in the medical management of stones.

Key words: potassium citrate, Citrus microcarpa bunge, Citrus auratium, Citrus grandis osbeck
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