The processed drinks produced from grass of three varieties of rice (Jasmine, Sukhothai 1 and Sukhothai 2) and one each from wheat and barley grasses were analyzed for chlorophyll and total phenolic contents, and antioxidant activities [ABTS radical cation decolorisation assay and ferric reducing/antioxidative power (FRAP) assay]. The consumer acceptance of all the drinks was also evaluated. One serving size (200 mL) of these contained 82–958 μg of chlorophyll, 5.60–26.14 mg Gallic acid equivalent for total phenolic content and their antioxidant activities, ABTS and FRAP values were 17.88–35.18 mg Vitamin C equivalent and 5.66–23.70 mg FeSO4 equivalent, respectively. The overall consumer acceptability of drinks was significantly correlated to their aroma intensity and consumer preference on aroma and flavor. Jasmine and Sukhothai 1 rice grass drinks were most preferred, however, one subgroup preferred grass drink from Sukhothai 1 rice, while the second subgroup preferred the drinks from Sukhothai 2 rice and Jasmine rice. Wheat and barley grass drinks were not preferred by both subgroups.
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Authors would like to thank The National Research Council of Thailand for the financial support, and Natural Rice Co., Ltd. for product supply. We also thank Ms. Jantima Thongboon, Ms. Suphannipa Kantima, Ms. Supika Kaewmuangma and Ms. Saranya Suwanpium for very useful helps on collecting data.
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Wangcharoen, W., Phimphilai, S. Chlorophyll and total phenolic contents, antioxidant activities and consumer acceptance test of processed grass drinks. J Food Sci Technol 53, 4135–4140 (2016). https://doi.org/10.1007/s13197-016-2380-z
- Grass drinks
- Total phenolic content
- Antioxidant activities
- Internal preference map
- Cluster analysis