Dissertation > Excellent graduate degree dissertation topics show

Studies on Isolation-Concentration and Determination of Tea Fluoride

Author: LuYing
Tutor: LiuZhongHua；HuangJianAn
School: Hunan Agricultural University
Course: Tea Science
Keywords: tea fluoride Alizarin Complexone spectrophotometry isolation and concentration anion-exchange resin alcohol-deposition
CLC: TS272.7
Type: Master's thesis
Year: 2005
Downloads: 256
Quote: 2
Read: Download Dissertation

Abstract


Fluoride is the indispensable microelement of human body, it plays a very important party in human health. The proper intake can prevent the decayed tooth, maintain the normal calcium and phosphate metabolism, buildup the skeletal strength and help the child development. At present, toothpaste with fluoride is used to prevent the decayed tooth. Tea tree is typical plant with high fluoride. The fluoride in tea is the natural resource which can be used to produce and must has the favorable prospect.For the first time, the research focus on the exploitation and utilization of the tea fluoride. Using raw dark tea as material, studied on a new method -Alizarin Complexone Spectrophotometry to detect the tea fluoride. Then the extraction method was researched and this method would be suit for industrial product and produce tea extracts with high-level content of fluoride. Also, applying anion-exchange resin and alcohol-deposition technic isolated and enriched the fluoride from tea extraction. The main results were as showed:1. Using Alizarin Complexone spectrophotometry determinate the fluoride in tea extraction directly, A good linearity relationship between the degree of absorbance and the concentration of fluoride was obtained when the concentration of fluoride was within the range of 0.1-0.7μg/ml. The determination method was characterized by precise degree, stability, convenience, simplicity and rapidity.2. Using H2O as dissolvent, the extraction method of fluoride-richness extract from raw dark tea was studied. At first the extract conditions were studied by single factor assays based on the content of fluoride in the extracts. Then the conditions were optimized through orthogonal experiment and variance analysis. With the consideration of cost of production and the extract efficiency, the optimum conditions for the extract of tea fluoride were determined, that the temperature was 85℃, the ratio of solid to liquid was 32:1 and the extraction time was 70 minutes.3. With 717 anion-exchange resin separated the fluoride from tea extraction. The single factor tests, orthogonal experiment and variance analyses were applied to optimize the manipulation parameters.The results show that the saturated

Related Dissertations

  1. The Effects of Pu-erh Tea on Prevetion and Treatment of Tumor,R285.5
  2. Effects of Shading on the Yield Index and Main Biochemical Components of Tea in Hilly Tea Plantation,S571.1
  3. Study on the Preparation of Medical Grade Glycerol from the By-product of Jatropha Biodiesel,TQ223.163
  4. Modification and Application of the Waste Fluorgypsum and the Treating of High Concentrations Fluoride Wastewater,X703
  5. The Effect of Nitrogen Phosphate and Potassium Proportion Fertilizers on Tea Tree Physiological Metabolism and Tea Quality,S571.1
  6. Nano-Packaging and Processing Technology on Preservation Quality of Tea,TS272
  7. Study on Tea Beverage Quality Security,TS275.2
  8. Analysis on Tea Consumer Behavior Characteristics and Marketing Strategies,F274
  9. Development of Detection Methods of Effective Biological Components from Tea by High Performance Liquid Chromatography and Their Applications in the Analysis of Fenghuang Oolong Tea,TS272.7
  10. Studies on the Formation and Control of Volatile N-Nitrosamines in Dry-Cured Meat,TS251.51
  11. The Study on Soil Acidification Dynamic and Adjustment Measures of Typical Tea Gardens in Jiangsu Province,S571.1
  12. Protection Effects of Pu-er Green Tea Water Extraction Again Trans Fatty Acid,R285.5
  13. Fungi in Green Brick Tea and Yellow Pigment of Eurotium,TS272
  14. Analysis of Effective Biological Components in Chinese Commerical Tea Drinks,TS272.7
  15. Study on Preparation and Antioxidative Activity of Tea Residues Polypeptide,TS209
  16. Studys of the Protein Extract and Utilization of Producing Protein Feed from Tea Residues,S816
  17. A Study on Producing Environment and Product Quality of Typical Organic Agriculture in East China,S571.1
  18. Detection of Principal Nutrition Constituents in Foxtail Millet and the Preparation of Foxtail Millet Tea,S515
  19. Fluorine silicone acrylate copolymer emulsion synthesis and properties of,TQ316.334
  20. The Taozhou Guards during the Ming Dynasty,K248
  21. The Research on the Effect of Green Barrier on Tea Export in Anhui,F426.82

CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > Beverage cold manufacturing industry > Tea > Product standards and testing
© 2012 www.DissertationTopic.Net  Mobile