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Stability of stevioside in Stevia extraction / Nor Aini Ahmad

By:

Nor Aini Ahmad

Material type: Text

TextPublication details: Kuantan, Pahang : UMP, 2010Description: xiii, 58 p. : ill. (some col.) ; 30 cm. + 1 CD-ROMISBN:

THE0003959(Local)

Subject(s):

Dissertation note: Project paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2010 Abstract: Stevia leaves have sweet taste more than 300-400 times sweeter than sugar. There are many researches have been done to show the benefits of stevia to our health. Producers use many types of preservation techniques to increase the stevia shelf life. One of methods is by addition of food additives. Thus, the aims of this research is to determine the stability of the sweet components in stevia, stevioside and also effect of additives to the stevioside. In this research we use fresh and dried stevia leaves. The leaves are cut into small pieces and will be extracted in 1L of water at 100oC for 5 minutes. The stevia extractions are filtered to remove the leaves. Then the stevia extractions are divided into two categories, sample with additive and without additives. About 3g of solid citric acid is added into samples with additive. The sweetness and the acidity of the samples are analyzed for 21 days. Based on the data we found that the stevioside more stable in stevia extraction samples without additives. Addition of additives caused increased in the acidity of the samples and the stevioside undergo the hydrolytic breakdown into steviol glycosides. Thus the sweetness was decreased in 21 days. Fresh stevia extraction had capability to resist from microbial activities, since pH decreased as the protection from the microbial activities.

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Holdings ( 2 )
Title notes ( 3 )

Holdings
Item type	Current library	Call number	Copy number	Status	Date due	Barcode
Final Year Report	UMPLIB GAMBANG	TP156.E8 A36 2010 rs Bc. (Browse shelf(Opens below))	1	Not for loan		0000063048
Final Year Report	UMPLIB GAMBANG	CD 5799 \| TP156.E8 A36 2010 rs Bc. (Browse shelf(Opens below))	1	Not for loan		0000063049

Project paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang - 2010

Bibliography : p. 55-57

Stevia leaves have sweet taste more than 300-400 times sweeter than sugar. There are many researches have been done to show the benefits of stevia to our health. Producers use many types of preservation techniques to increase the stevia shelf life. One of methods is by addition of food additives. Thus, the aims of this research is to determine the stability of the sweet components in stevia, stevioside and also effect of additives to the stevioside. In this research we use fresh and dried stevia leaves. The leaves are cut into small pieces and will be extracted in 1L of water at 100oC for 5 minutes. The stevia extractions are filtered to remove the leaves. Then the stevia extractions are divided into two categories, sample with additive and without additives. About 3g of solid citric acid is added into samples with additive. The sweetness and the acidity of the samples are analyzed for 21 days. Based on the data we found that the stevioside more stable in stevia extraction samples without additives. Addition of additives caused increased in the acidity of the samples and the stevioside undergo the hydrolytic breakdown into steviol glycosides. Thus the sweetness was decreased in 21 days. Fresh stevia extraction had capability to resist from microbial activities, since pH decreased as the protection from the microbial activities.