Pembuatan Serta Karakterisasi Haemodialisa Melalui Reaksi Antara Alginat Dengan Kalsium Klorida Dan Magnesium Klorida
Meriaty, Hemat R. Brahmana
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Magnesium and sodium have nearly same properties due to nearly place in the third period of elements of periodic table. Eventhough magnesium has d orbital, but ionization potential still high compare to calcium. Therefore, magnesium frequently makes interaction with water than forms n bond with oxygen of guluronate. Consequently, magnesium alginate dissolves in water and it can not form chelate complex. Also it can not be used as haemodialysis membrane. Calsium, which has lower ionization potential than magnesium, has tendency to form Ca2+ cation and also d orbital back donation makes chelate with oxygen n bond of guluronate. Interestingly, calsium alginate membrane 1% formed lower chelate complex compare to 2% and 3%. Consequently, calsium alginate membrane 1% has greater porosity than 2% and 3%. Therefore, urea and sodium salisylate can became easier difusan in membrane 1%. These things still happen on membranes 2% and 3%. Albumin did not diffuse through calsium alginate membrane due to high molecular weight. Actually, calsium alginate 1% was the most potential as haemodyalisis membrane.