{"title":"Determination of Physicochemical Properties, Bioaccessibility of Phenolics and Antioxidant Capacity of Mineral Enriched Linden Herbal Tea Beverage","authors":"Senem Suna, Canan Ece Tamer, \u00d6mer Utku \u00c7opur","volume":134,"journal":"International Journal of Nutrition and Food Engineering","pagesStart":31,"pagesEnd":35,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10008519","abstract":"
In this research, dried linden (Tilia argentea<\/em>) leaves and blossoms were used as a raw material for mineral enriched herbal tea beverage production. For this aim, %1 dried linden was infused with boiling water (100 °C) for 5 minutes. After cooling, sucrose, citric acid, ascorbic acid, natural lemon flavor and natural mineral water were added. Beverage samples were plate filtered, filled into 200-mL glass bottles, capped then pasteurized at 98 °C for 15 minutes. Water soluble dry matter, titratable acidity, ascorbic acid, pH, minerals (Fe, Ca, Mg, K, Na), color (L*, a*, b*), turbidity, bioaccessible phenolics and antioxidant capacity were analyzed. Water soluble dry matter, titratable acidity, and ascorbic were determined as 7.66±0.28 g\/100 g, 0.13±0.00 g\/100 mL, and 19.42±0.62 mg\/100 mL, respectively. pH was measured as 3.69. Fe, Ca, Mg, K and Na contents of the beverage were determined as 0.12±0.00, 115.48±0.05, 34.72±0.14, 48.67±0.43 and 85.72±1.01 mg\/L, respectively. Color was measured as 13.63±0.05, -4.33±0.05, and 3.06±0.05 for L*, a*,<\/em> and b*<\/em> values. Turbidity was determined as 0.69±0.07 NTU. Bioaccessible phenolics were determined as 312.82±5.91 mg GAE\/100 mL. Antioxidant capacities of chemical (MetOH:H2<\/sub>O:HCl) and physiological extracts (in vitro digestive enzymatic extraction) with DPPH (27.59±0.53 and 0.17±0.02 μmol trolox\/mL), FRAP (21.01±0.97 and 13.27±0.19 μmol trolox\/mL) and CUPRAC (44.71±9.42 and 2.80±0.64 μmol trolox\/mL) methods were also evaluated. As a result, enrichment with natural mineral water was proposed for the development of functional and nutritional values together with a good potential for commercialization.<\/p>\r\n","references":"[1]\tTang, Y., Zhuge, R., 1996. Geographical Distribution of Tilia Linn. Acta Phytotaxonomica Sinica 34: 254\u2013264.\r\n[2]\tOniszczuk, A., Podg\u00f3rski, R., 2015. 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