STUDI EFEK PAPARAN PLASMA TERHADAP ASAM PALMITAT DAN KARAKTERISTIK LARUTANNYA

Abstract

Plasma with atmospheric gas source (are about 78,08% nitrogen, 20,95% oxygen, 0,93% argon and 0,03% carbon dioxide) have been used to study the effect of palmitic acid physical and chemical characteristic changes. Plasma that generated by air at atmosphere condition had been used to exposed palmitic acid at varieted times of 25, 50, 75, and 100 minutes. As a reference was the palmitic acid without plasma exposure. The effect performed by plasma exposure to palmitic acid was shown from its liquid characteristic that was known from the change of carboxlylic group reactivity to KOH and I2, melting point, and its bioactivity changes. The reactivity of palmitic acid liquid to KOH was determined by method of acid and saponification value. The reactivity to I2 was measured by method of iod number. From the research, it can be concludes that plasma exposure can give the effect to the palmitic acid bioactivity and the changes of carboxylic group reactivity of palmitic acid to KOH and iodide with fluktuative design. Plasma exposure can be decrease the palmitic acid melting point from 62OC to 58OC, but, it was not cause the hydrocarbon-chain fragmentation.