1 Alobo AP, Adeleiye PO, Abugh M, Atser AJ (2009) Consumer Use and Attitude Towards Zobo: A Nigerian Sorrel Drink. Nigerian Food Journal 27: 219-28.

2 Muhammad FS, Umar BM (2007) Production and Organoleptic Assessment of Sweetened Sorrel Powder. Namoda Tech-ScopeJ Appl Sci Technol 7: 7-13.

3 Hassan MK, Beman-Ali, JK Mohammad AA, Farhad F (2009) Effects of Sour Tea (Hibiscus sabdariffa) on Lipid Profile and Lipoproteins in Patients with Type II Diabetes. J Altern Complement Med 15: 899-903.

4 Mohammed FS, Ismail BB (2014) Comparison on Two Methods of Preparation of Zobo Drink on the Survival of Bacillus spp. Am J Food Technol 9: 200-8.

5 Morton JF (1999) Roselle, Hibiscus sabdariffa L. Retrieved on 26th July, 2005.

6 Olayemi F, Adebayo R, Muhammad R, Bamishaye E (2011) The Nutritional Quality of Three Varieties of Zobo (Hibiscus sabdariffa) Subjected to the same Preparation Condition. Am JFood Technol 6: 705-708.

7 Babalola SO (2000) Chemical Analysis of Roselle Leaf (Hibiscus sabdariffa), in Proceeding of 24th Annual Conference of Nigerian Institute of Food Science & Technology 228-9.

8Schippers RR (2000) African Indigenous Vegetable: An over view of the Cultivated Species. Chatham, UK; Natural Resources Institute/ACP-ED Technical Centre for Agricultural and Rural Cooperation.1-214.

9 Mazza G, Miniati E (1993) Anthocynins in Fruits, Vegetables and Grains. Bocaraton, Florida: CRC Press.

10 Bridle P, Timberlake CF (1997) Anthocynins as Natural Food Colours: Selected Aspects. Food Chem 58: 103-9.

11 Pesen Özdoğan F, Orhan N, Ergun F (2011) Studies on the Conformity of Hibiscus sabdariffa L. Samples from Turkish Market to European Pharmacopeia. FABAD J Pharm Sci 36: 25-32.

12 Oboh G, Elusiyan CA (2004) Nutrient Composition and Anti-microbial Activity of Sorrel Drinks (soborodo). J Med Food 7 : 340-2.

13 Mohammed SF (2005) Effects of Growing Conditions of the Quality of Sorrel Calyces (Hibiscus sabdariffa) and Sorrel Drinks. Dep Food Sci Technol,Kaduna Polytechnic, Kaduna.

14 Ukwuru MU, Uzodinma CC (2010) Preservative Effect of Spices and their Flavour Acceptability in Zobo Drink. Niger Food J 28: 265-274.

15 Nwachukwu E, Onovo OM, Eadie T (2007) Effect of Lime Juice on the Bacterial Quality of Zobo Drinks Locally Produced in Nigeria. Res J Microbiol 787-891.

16 Ayo JA, Tehinse JF (2006) Food Dehydration: Principles and Practice, 1st Ed. Kaduna: Amana Printing and Advertising Ltd. Pp. 171-202.

17 Mohammed SF (2010) Production and Evaluation of Instant zobo drink (Hibiscus sabdariffa). Depart Food Sci Technol College of Food Technology, Federal University of Agriculture, Makurdi, Benue state.

18 AOAC (2000) Official Method of Analysis of Association of Analytical Chemists, AOAC International, (17th Ed.). Washington D.C 274-310.

19 Pearson D (1976) Chemical Analysis of Foods, 7th Ed. Churchill Livingstone, Edinburgh, London and New York.

20 Onwuka GI (2005) Food Analysis and Instrumentation: Theory & Practice, 1st Ed. Lagos: Division of HG Support Nigeria Ltd 80,113-114,126.

21 Murano PS (2003) Understanding Food Science and Technology. USA: Thomas Learn Acade Resou Cent.63-75,82-83.

22 Magdi AO (2004) Chemical and Nutrient Analysis of Baobab (Andansonia digiata) Fruit and Seed Protein Solubility. Plant Foods Hum Nutr 59: 29-33.

23 Health Protection Agency (2004) Aerobic Plate Count at 30oC: Surface Plate Method. National Standard Method F10 Issues 1.

24 Ihekoronye AI, Ngoddy PO (1985) Integrated Food Science and Technology for the Tropics. London.173-193.

25 Iwe MO (2007) Current Trends in Sensory Evaluation of Foods, 1st Ed. Enugu, Nigeria: RojointCommunication Services Ltd 136-139.

26 Iwe MO (2002) Handbook of Sensory Methods & Analysis. Enugu, Nigeria: Rojoint Communication Services Ltd 71-78.

27 Bitnes J, Rodbotten M, Lea P, Ueland Q, Martens M (2007) Effect of Product Knowledge on Profiling Performance Comparing Various Sensory Laboratories. J Sens Stu 22: 66-80.

28 Clapperton J, Piggot J (1979) Flavour Characterization by Trained and Untrained Assessors. J Inst Brewi Distil 85: 275-7.

29 Roberts A, Vickers ZM (1994) A Comparison of Trained and Untrained Judges Evaluation of Sensory Attributes Insensitivities and Liking of Cheedar Cheeses. J Sen stu 9: 1-20.

30 Walters CJ, Allchurch EM (1994) Effect of Training Procedure on the Performance of Descriptive Panels. Food Qual Pref 5: 203-14.

31 Bende M, Nordin S (1997) Perceptual Learning in Olfaction: Professional Wine Tasters versus Controls. Physiol Behav62: 1065-70.

32 Hughson AL, Boakes RA (2002) The Knowing Nose: The Role of Knowledge in Wine Expertise. Food QualPref 13: 463-472.

33 Labbe D, Rytz A, Hugi A (2004) Training is a Critical Step to Obtain Reliable Product Profiles in a Real Food Industry Context. Food QuaL Pref 15: 341-348.

34 WardlawGM (2001) Contemporary Nutrition: Issues and Insights, 4th Ed.Boston: GrawHill Higher Education 104-5, 145-8, 211-4, 240-2, 281-7.

35 Babalola SO, Babalola AO, Aworh OC (2001) Compositional attributes of the calyces of roselle (Hibiscus sabdariffa L). J Food Technol Africa.

36 Orazulike RE (2005) Human Nutrition in the Tropics -A Case Focused Approach. Bauchi: ALPHA Graphics Publications 10-60.

37 Onuorah CE, Ayo JA, Uhiara NS, Jideani VA (2004) Food Product Development, 1st Ed. Kaduna: Amana Printing and Advertising Ltd. 117-118 and 135.

38 Wilson JX (2005) Regulation of Vitamin C Transport. Annu Rev Nutr 25, 105-25.

39 ICMSF (2002) International Commission on Microbiological Specifications for Foods Microorganisms in Foods 7 (2002) Microbiological Testing in Food Safety & Management. New York, USA Academ Publi 70-80.