Quality Evaluation of Herbal Tea Blends from Ginger and Pavetta crassipes
J. S. Alakali
Department of Food Science and Technology, University of Agriculture, Makurdi, Nigeria
A. R. Ismaila *
Department of Food Science and Technology, Federal University, Dutsin-Ma, Nigeria
I. C. Alaka
Department of Food Science and Technology, Ebonyi State University, Abakaliki, Nigeria
J. Faasema
Department of Food Science and Technology, University of Agriculture, Makurdi, Nigeria
T. A. Yaji
Department of Food Science and Technology, University of Agriculture, Makurdi, Nigeria
*Author to whom correspondence should be addressed.
Abstract
Tea-like product (green tea) was developed using ginger (Zingiber officinale, Rose) and Pavetta crassipes k. schum blends. Samples were blended in the following ratios (ginger/pavetta): 100/0 (sample A), 80/ 20 (sample B), 60/40 (sample C), 40/60 (sample D) and 20/80 (sample E). The physicochemical, phytochemical, antinutritional and sensory properties of the formulations were investigated. Results showed that increase in Pavetta crassipes level in the formulation significantly (P < 0.05) increased protein (8.35 - 10.67), fat (4.6 – 6.31) and carbohydrate (17.99 – 47.38) contents. However, moisture content, ash content and crude fibre significantly decreased (p ≤ 0.05) from 8.72 – 7.54, 1.96 – 1.67 and 58.13 – 26.43 respectively. The micronutrients including Ca increased significantly while Mg decreased with increased Pavetta crassipes. Vitamin C content also increases significantly. The supplementation of Pavetta crassipes leaf powder also decreased significantly (P < 0.05) the level of anti-nutrients including oxalates, total phenol and alkaloids while phytates content increased significantly (P < 0.05). Na2CO3, K2CO3 alkalinity and acid insoluble ash decreased significantly from 7.66 – 6.21, 11.23 – 8.32 and 57.93 – 27.36 respectively. There was no significant difference (p≤ 0.05) between all the samples and Lipton tea (sample F). Sample C were generally more accepted.
Keywords: Ginger, Pavetta crassipes, tea-like product, phytochemical and physicochemical