Kaedah Kolorimetri untuk Analisis Kuantitatif Kapsaisin Secara Pencaman Corak Menggunakan Jaringan Neural Tiruan

Mat Arip, Mohamad Nasir and Ahmad, Musa and Mokhtar, Ahmed Mahir and Taib, Mohd. Nasir and Heng, Lee Yook (2002) Kaedah Kolorimetri untuk Analisis Kuantitatif Kapsaisin Secara Pencaman Corak Menggunakan Jaringan Neural Tiruan. Pertanika Journal of Science & Technology, 13 (1). pp. 75-86. ISSN 0128-7680

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Abstract

A quantitative study for capsaicin based on the use of 2,6-dichloro-pbenzoquinone- 4-chlorimide (Gibbs reagent) and artificial neural network (ANN) has been carried out. The characterization include pH optimization, effect of reagent concentration, dynamic range of capsaicin concentration, photo stability, limit of detection and reproducibility. The optimum response was obtained at pH 11.0 and Gibbs reagent concentration of 2.96 x 104 M. The reproducibility of the method was very satisfactory with RSD values of 3.55%, 2.44% and 4.52% for capsaicin concentration of 200 ppm, 500 ppm and 800 ppm, respectively. Photostability test showed that the reagent was very stable with RSD value of 0.013% for the duration of 38 hours. A three layer feed-forward neural network was used and network training was performed by using back propagation algorithm. For the determination of capsaicin, a neural network with 20 hidden neurons, 0.00001% learning rate and trained over 47,738 cycles produced the best result. This network was able to extend the narrow dynamic range of capsaicin from 0 - 200 ppm to 0-600 ppm. The average interpolation error produced by this network was approximately 0.06 %

Item Type:Article
Keyword:Tahap kepedasan, kapsaisin, reagen Gibbs, jaringan neural timan
Faculty or Institute:Faculty of Food Science and Technology
Publisher:Universiti Putra Malaysia Press
ID Code:3834
Deposited By: Nur Izzati Mohd Zaki
Deposited On:02 Dec 2009 01:33
Last Modified:27 May 2013 07:11

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