PENGEMBANGAN SENSOR KIMIA UNTUK MONITORING PENGAWET BENZOAT DI DALAM BERBAGAI JENIS MI NUMAN
Abstract
The development of chemical sensor for monitoring of food
preservatives of bezoic acid in various types of beverages is explained. The
sensor was developed by the integration of spectrometric cell, UV detector
in UV-Vis spectrometric system. The sensor signal is obtained from the
measurement of bozoic acidic at il 229.65 nm. The chemical sensor give
sensitive response to benzoic acid, where the detection linierity is lies
beween 0.05 - 40 ppm benzoic acid, slope slop 0.0613 au/ppm benzoic
acid, and the detection limit is 0.01 ppm benzoic acid. The chemical sensor
has been applied for the determination of bezoic acid in real sample, where
the concentration of benzoic acid in the bevereges are found in the range of
7 - 700 ppm benzoic acid. The measurements obtained with chemical
sensor are agree with that HPLC standard method (R2 = 0.932) ..
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