Malaysian Journal of Analytical Sciences Vol 19 No 2 (2015): 377 – 387

 

 

 

AN INVESTIGATION OF POTENTIAL FRAUD IN COMMERCIAL ORANGE JUICE PRODUCTS IN MALAYSIAN MARKET BY CLUSTER ANALYSIS AND PRINCIPAL COMPONENT ANALYSIS

 

(Satu Siasatan Tentang Penipuan Berpotensi Dalam Produk Komersil Jus Oren Di Pasaran Malaysia Dengan Analisis Kelompok Dan Analisis Komponen Utama)

 

Seow Eng Keng¹, Abbas Fadhl Mubarek Al-Karkhi², Mohd Khairuddin Mohd Talib³,

Azhar Mat Easa¹, Cheng Lai Hoong¹*

 

¹Food Technology Division,

²Environmental Technology Division,

School of Industrial Technology,

Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.

³Food Safety and Quality Division,

Kedah State Health Department,

Lebuhraya Sultanah Bahiyah, 05350 Alor Setar, Kedah, Malaysia

 

*Corresponding author: lhcheng@usm.my

 

 

Received: 14 January 2015; Accepted: 10 February 2015

 

 

Abstract

This study was triggered by Malaysia Ministry of Health to monitor quality of commercial orange juice products sold in Malaysia market. A total of 19 orange juice samples from 14 different brands of packed orange juice products and 5 different brands of fresh orange fruit juices were analyzed for total soluble solids content, total titratable acidity, sugar composition and amino acid profiles. Hierarchical Cluster analysis (HCA) and Principal component analysis (PCA) on amino acid composition alone allowed visual discrimination between fresh squeezed orange juices and commercial packed orange juices. Suspicion of mislabel was raised in cases of miss-classification.

 

Keywords: food authentication, orange juice, principal component analysis, hierarchical cluster analysis

 

Abstrak

Kajian ini dicetuskan oleh Kementerian Kesihatan Malaysia demi memantau kualiti produk komersil jus oren yang dijual dalam pasaran Malaysia. Sejumlah 19 sampel jus oren terbungkus dari pelbagai jenama dan 5 jenama jus oren buah segar dari jenama berbeza telah dianalisa dari segi kandungan zat terlarut, asiditi tertitrat, komposisi gula dan profil asid amino. Analisis Kelompok Hierarki (HCA) dan Analisis Komponen Utama (PCA) ke atas komposisi asid amino sahaja telah membenarkan pembezaan yang jelas antara jus oren diperah segar dan jus oren komersil terbungkus. Kesangsian silap-label telah dibangkitkan dalam kes-kes di mana kesilapan-klasifikasi dapat dikesan

 

Kata kunci: Ketulenan makanan, jus oren, analisis komponen utama, analisis kelompok hierarki

 

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