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Study on Extraction Process and Dynamic Changes of Toosendanin

Author: QinLin
Tutor: SuYinQuan
School: Northwest University of Science and Technology
Course: Conservation and Utilization of Wild Fauna and Flora
Keywords: Toosendanin Extraction Process Content changes
CLC: TQ453.2
Type: Master's thesis
Year: 2011
Downloads: 27
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Abstract

Toosendanin botanical insecticides as green pollution by the extensive attention of scholars at home and abroad. Chinaberry fruits and leaves bitter neem prime object of study, a systematic way to study the ripe fruit of bitter neem prime the extraction process, bitter neem elements with sub-isomers in the fruit and leaf content and its distribution of the dynamic changes in the law, in order to provide some theoretical reference for the the Chinaberry future comprehensive development and utilization. The results are as follows: under laboratory conditions, the use of solvent extract in the from Chinaberry mature fruit the Toosendanin uniform experimental design investigated the extraction process in petroleum ether to ester, ethanol extract and ethyl acetate extraction process of extraction efficiency. The results showed that the optimal extraction conditions Toosendanin than 1:34 (g: petroleum ether extraction liquid ratio 1:24 (g: mL), time 20min, anhydrous ethanol reflux extraction (95 ℃) liquid material : mL), time 390min, 125mL ethyl acetate 100min, Chinaberry prime yield reached 0.72%. Content of fruit Toosendanin. July-December, chinaberry fruit Toosendanin content changes very significantly. The content of the fruit Toosendanin A time change unimodal curve peaks in mid-November, about 0.53%; B content and Toosendanin bimodal curve changes over time, peaks appear at the end of July and the end of November, respectively. 0.58% and 0.76%. B content in the six month period were measured, the total content Toosendanin trend Toosendanin over time trends, there are two peak by the end of November Toosendanin highest content of 1.27%. In the beginning of July and the end of October, the A, B content of Toosendanin close, the other period Toosendanin B content are the above Toosendanin A content. Content of leaves Toosendanin. May to October, the bitter neem leaves content of Toosendanin in change is very significant, the total content of Toosendanin change over time showed a single peak curve, the peak in early June, at 0.22%. The total content of the B content Toosendanin trend Toosendanin with time trend similar maximum in early June; and Toosendanin A bimodal trends change over time, and the maximum value in early July. During this time, in early July the leaves the in Toosendanin A content than Toosendanin B the other period Toosendanin B were higher than Toosendanin A content. The content of leaves and fruit of different periods Toosendanin more significant differences, its correlation trend was not significant. In addition to the leaves and fruit Toosendanin content is close in early July, the fruits of other periods Chinaberry prime content were higher than the leaves Toosendanin more than five times, leaves and fruit Toosendanin isomers also follow the same rule. Mature Chinaberry fruit the different parts Toosendanin content there were extremely significant differences; the same site Toosendanin same isomers A and B between content differences also reached a very significant level. Go nuclear fruit bitter neem prime content than seeds high 25.1%; entire chinaberry fruit, Toosendanin A content Toosendanin B content similar, including the content of the seeds bitter neem prime A higher and higher to the nuclear fruit bitter neem prime B content. Between Shandong, Shaanxi mature chinaberry fruit the Toosendanin content there is very significant difference, Yangling, Shaanxi mature chinaberry fruit bitter neem prime content of more than Shandong Tai'an the nearly 1.4-fold, indicating that significant geographic differences in the Toosendanin content. In addition, Toosendanin methanol solution at 4 ℃ saved 35 days after the degradation rate of 91.3%, in line with the pesticide degradation kinetics model.

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