Photostability Study on Character and Antioxidant Activity of Tomato Extract (Solanum lycopersicum l.) in Nanostructured Lipid Carrier (NLC) and Conventional Creame

Noorma Rosita, Dewi Haryadi, Tristiana Erawati, Rossa Nanda, Widji Soeratri


The aim of this study was to investigate the ability of NLC in increasing photostability of tomato extract in term of
antioxidant activity. Photostability testing on antioxidant activity of samples were conducted by accelerating method using
UVB radiation 32.400 joule for 21 hours radiation. Antioxidant activity was measured by DPPH method. NLC was made
by High Shear Homogenization (HPH) method at 24000 rpm for 4 cycles, while conventional creame was made by low
speed at 400 rpm. The product were characterized include: pH, viscosity, and particle size. There were had difference
characters and physical stability. NLC had smaller size, more homogenous and more stable than conventional creame. It
was known that stability of antioxidant activity of tomato extract in NLC system higher than in conventional creame. That
was showed with k value, as constanta of rate scavenging activity decreasing in antioxidant power between time (Sigma
2-tail less than 0.005) of NLC and conventional creame were: 2.03x10-2 %/hour ±0.08 (3.94) and 4.71x 10-2 %/ hour ±0.23 (4.88)


antioxidant, photostability, tomato extract, NLC, DPPH.

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