PENETAPAN KADAR ASAM BENZOAT DALAM BEBERAPA MERK DAGANG MINUMAN RINGAN SECARA SPEKTROFOTOMETRI ULTRAVIOLET

Abstract

Benzoic acid is one of the synthetic preservatives, work effectively at pH 2.5 to
4.0, therefore it is widely used in acidic food or drink. This study aims to determine
benzoic acid content in some soft drink products, their conformity with Permenkes RI
No.722/Menkes/Per/IX/88 on food additives, and to find out if there were any variance
of benzoid acid content in a different kinds of soft drink products.
Determination of benzoid acid levels was performed by ultraviolet
spectrophotometry following solvent extraction of the benzoid acid with chloroform.
Qualitatively, it was found that all of the sample contained benzoid acid. Quantitatively,
the amount of benzoid acid in sample A was 227,73 mg/kg of materials; sample B was
182,38 mg/kg of materials; sampel C was 259,52 mg/kg of materials; sample D was
325,01 mg/kg of materials; sample E was 357,33 mg/kg of material. The result
indicated that there were variance of benzoid acid content in different soft drink
products. The use of benzoic acid in soft drinks was lower compaired to that of
Permenkes RI No.722/Menkes/Per/IX/88 (600 mg/kg of materials).