Document Details
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Document Type |
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Thesis |
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Document Title |
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DETECTING ADULTERATION IN SOME LOCAL COMMERCIAL FRUIT JUICES IN SAUDI ARABIA كشف الغش لبعض عصائر الفواكه التجارية المحلية في المملكة العربية السعودية |
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Subject |
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Faculty of Human Sciences and Designs |
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Document Language |
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Arabic |
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Abstract |
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The pomegranate fruit (Punica granatum) has become an international high-value crop for the production of Commercial Pomegranate Juice (PJ). The perceived consumer value of PJ is due in large part to its potential health benefits. However, the pomegranate juice adulteration happens due to the fact that the high fresh pomegranate high price and the production is limited. It is difficult to detect adulterers by consumers and therefore require rapid, accurate and sensitive detection. Therefore, the aim of this study was to detect adulteration in four brands in Saudi Arabia market compared with natural fresh (control)and clarified (processed) PJ. The six samples were analyzed for physicochemical, along with T.S.S, %fruit in juice, anthocyanin, ash, minerals total phenolic (TPs), antioxidant activity and total sugars content. Results of physicochemical analysis of brand B have the highest contents of total phenolic compounds at (p ≤ 0.05), when compared to other treatments. It was indicated that brands C and D also have the highest contents at (p ≤ 0.05) of T.S.S and antioxidant activity. Meanwhile, brands samples B and D had highly percentage of total sugars. While, the lower percent of fruit in PJ were noticed of brands A, C and D by11.25, 8.78 and 7.3%, respectively. The highest content of potassium were shown in brand B, fresh and clarified by 157, 113 and 113 mg/100mL, respectively. Furthermore, brand B had a highly percentage of total titratable acidity and ash. HPLC analysis showed that Fructose and glucose were found as the major sugars in fresh and clarified PJ when compared to other treatments. The major organic acids were malic and citric in clarified PJ by 3.44 and 17.088 g/l, respectively. Results also indicated that highest content of preservative materials were recorded in brand sample D . It could be concluded that brands sample A, C, D used in this study had a higher level of adulteration along low percent fruit in juice, indicating water additions. Also, brands C and D adulterated by sucrose additions and add preservative in brand D. It is recommended that it should be made mandatory for all juice manufacturers, to ensure that authentic fruit juices are manufactured and honestly labeled. Also, determine the extent of adulteration with an emphasis on food safety to protect the health of consumer. So, they purchase quality juice rather than quantity.
Key words: Pomegranate fruit, Commercial Pomegranate Juice, Antioxidant Activity, Phenolic Compounds, percent fruit in juice , preservative materials |
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Supervisor |
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Prof. Dr. Lobna Abd El-Fattah Haridy |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1441 AH
2020 AD |
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Added Date |
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Wednesday, May 27, 2020 |
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Researchers
| عنود عابد السرواني | Alsrwani, Anoud Abed | Researcher | Master | |
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