PROSES PENGKELATAN MINYAK CENGKEH DENGAN ASAM SITRAT

Abstract

Abstract

Clove leaf oil is essential oil produced by distillation of clove leaf. The oil is still dark color

and low eugenol content, generally. It was caused by Fe content in the oil, so the oil has dark

color. Furthermore, it needs to improve the value of clove leaf oil through chelating process

with citric acid. The objective of research is to obtain the significant variable for content and

volum response. The research conducts with initial Fe content, chelating process, and final

analysis of Fe content. Analysis of Fe content uses Spectrofotometry. The research uses

design of experiment: factorial design 2⁴ with variables: citric acid concentration (1- 2%b),

temperature (50^oC – 70^oC), time (l - 2 hours) and stirring speed (300-600 rpm). Data

treatment obtained using Design Expert software. The result shows that temperature and time

are significant variable for decreasing Fe content. Decreasing of Fe content from initial

content 22,98mg/L down to l,86 - 2l,26mg/L. Regresion model obtained is Eugenol =74,45

+ 0,10325 temperature. However, absorbent concentration and stirring speed variables have

significant influent for decreasing volume. The regresion model obtained is Fe content =

34,6075-(0,54775T)-29,0551+0,548Tt, where T  is temperature and t is time of chelating

process.

Key word: clove leaf oi;  chelaling;  citric acid; Fe  content