Stevia-EMAP
Stevia-EMAP Stevia-EMAP
Methanol appears to be used in most extraction and purification processes in Japan, presumably to improve extraction efficiency and facilitate the separation of individual steviosides. More recent processing methods using water filtration procedures do not use methanol and so produce a more ‘natural’ product. Newer factories in Brazil, China and India use water only extraction procedures and claim 96% purity of product.
Purified Water In brief, steviol glycosides are obtained by the extraction of stevia leaves with water. Leaves from different varieties of stevia plants are used for stevioside and rebaudioside A production. Ferric chloride and calcium hydroxide are added to the extract solution to facilitate precipitation. The extraction solution is passed through plate filtration followed by adsorption onto resin; the glycosides are subsequently eluted with ethanol. The solution is decolored with active carbon and concentrated with film evaporators. It is again decolored with active carbon and filtered. The concentrate is spray dried to obtain the primary stevia extracts rich in stevioside or rebaudioside A. Meaning? Stevia Leaves With STV≥45% contents Water Extraction Precipitation Filter Ion Exchange Decoloring with active carbon Concentration Decoloring with active carbon Sterile Filtration Spray drying Packing Process Flow Diagram for stevia Extract Quality control
- Page 1 and 2: Techno-economic study on Stevia pro
- Page 3 and 4: The Guarani Indians of Paraguay had
- Page 5 and 6: Stevia was first brought to the att
- Page 7 and 8: "Will sugar always be more advantag
- Page 9 and 10: Stevia Liquid Extracts: These are c
- Page 11 and 12: Food uses Maximum use level (mg Ste
- Page 13 and 14: Since the Stevia extract, Rebaudios
- Page 15 and 16: ASIA PACIFIC 36% OTHERS 1% EUROPE 9
- Page 18 and 19: Stevia stay in the field for severa
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- Page 22 and 23: • The Root: The root of stevia pl
- Page 24 and 25: • The leaf: The leaves are oval o
- Page 26 and 27: The component glycosides of particu
- Page 28 and 29: • A variety of soil types, rangin
- Page 30 and 31: • Plant Varieties: • There are
- Page 32 and 33: • Planting: Transplants from cutt
- Page 34 and 35: • Appropriate planting time: Tran
- Page 36 and 37: • Raised bed preparation: • For
- Page 38 and 39: • Pinching tips: Since Stevia has
- Page 40 and 41: • Weeding: Removal of weeds can b
- Page 42 and 43: • Harvesting: • Timing of harve
- Page 44 and 45: Crushing: • After drying, leaves
- Page 46 and 47: Pests and Diseases: • Stevia is u
- Page 50: Process Flow Diagram for Purificati
Purified Water<br />
In brief, steviol glycosides are obtained by the<br />
extraction of stevia leaves with water. Leaves from<br />
different varieties of stevia plants are used for<br />
stevioside and rebaudioside A production. Ferric<br />
chloride and calcium hydroxide are added to the extract<br />
solution to facilitate precipitation. The extraction<br />
solution is passed through plate filtration followed by<br />
adsorption onto resin; the glycosides are subsequently<br />
eluted with ethanol. The solution is decolored with<br />
active carbon and concentrated with film evaporators. It<br />
is again decolored with active carbon and filtered. The<br />
concentrate is spray dried to obtain the primary stevia<br />
extracts rich in stevioside or rebaudioside A. Meaning?<br />
<strong>Stevia</strong> Leaves<br />
With STV≥45% contents<br />
Water Extraction<br />
Precipitation<br />
Filter<br />
Ion Exchange<br />
Decoloring with active carbon<br />
Concentration<br />
Decoloring with active carbon<br />
Sterile Filtration<br />
Spray drying<br />
Packing<br />
Process Flow<br />
Diagram for<br />
stevia Extract<br />
Quality control
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