PENGHILANGAN RACUN ASAM SIANIDA ( HCN ) DALAM UMBI GADUNG DENGAN MENGGUNAKAN BAHAN PENYERAP ABU

Abstract

Gadung constitutes carbohydrate source. But then, gadung also contain poison who can switch off if consumed by overdose. Severally region at Indonesian, gadung is utilized as food of alternative or just is utilized as demulcent food. Besides as source of carbohydrate, gadung also contain calcium, phosphorus and iron substance one stand in good stead in human body. Remembering gadung quality that exists at marketing that stills to contemn, so needs to be studied by method that effisien and results gadung that high-grade. To the effect this research is subject to be know HCN's poison rate that exists in gadung's corm, knowing absorbent material type influence (chaff ash and wood ash) one that is utilized and weight influence of that absorbent material for disappearance to titrate HCN's poison in gadung's corm. Research did by adds absorbent material on surface cut gadung with rolled out. Gadung already being sliced by little – little then added by absorbent material (chaff ash, wood ash, and active carbon) until rolled out goes to all cut surface with variation (5%, 10%,15%) and is set, packaged by calico. Then is pressed and at aging up to 24 hours and afterwards are dried. Soaking in water 15 liters up to 72 hours, then is dried again. Experimental result then analysed by spektrofotometri's quiz tool so known by HCN's poison rate that lost from umbi gadung. Result is that show trial active carbon can't be utilized to absorb HCN'S poison, meanwhile wood ash and chaff ash can be utilized as absorbent material of HCN'S poison on gadung's corm. Chaff ash with composition 5%,10%,15% get to remove HCN as big as 42,08%; 56,57%; 56,58%. Timbered ash with composition 5%,10%,15% can remove HCN'S poisons as big as 27,44%; 56,51%; 63,78%. Optimum absorbent material acquired on absorbent material type that is utilized as ash of wood as big as 15% of heavy gadung's corms, which is poison which gets lost as big as 63,78%.