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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Gypsum, oriental medicine, contains hydrated calcium sulphate [CaSO 4 ·2H 2 O] as a major compound andhas been used for treating headache of common cold in Korean traditional medicine. However, the safety ofgypsum can not be guaranteed because of not only its unclear origin, but also its unstandardizated pre-treatmentprocess. In the previous paper, we suggested the evaluation technique for gypsum. As a consecutive research,we established the standard pre-treatment processing methods to reduce toxicity and increase safety of Gypsum.
In this research, previously confirmed authentic gypsum sample (G18) was selected and used for furtherexperiments. The gypsum sample was heated under microwave and in furnace over various temperature andheating time. The amount of major (Ca, S) and toxic minor elements (As, Cd, Pb and Hg) in before and afterpre-treatment sample were compared for the safety and efficiency evaluation. Dehydration of water in gypsumwhich is the literally known main purpose of processing was efficiently completed within 30 min at high temperature(over 600oC) in a furnace. The weight of Gypsum Preparatum (thermal pre-treated gypsum) wasdecreased nearly 20% after pre-treatment because of water elimination and this naturally increase the % contentsof major elements. The amount of toxic heavy metals, As, Cd, Pb and Hg were also diminished withinsafe values (less than 10 µg/kg). Especially, mercury was removed completely. We suggest that furnace treatmentcan be a standard pre-treatment process for Gypsum.
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