عندي بروجكت واريد مساعدتكم فيه اذا ممكن ؟؟؟؟؟

غلاك

عضو جديد
إنضم
21 أغسطس 2010
المشاركات
14
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السلام عليكم ..
عندي بروجكت واريد مساعدتكم فيه اذا ممكن .. بروجكت عن استخلاص الالوان الطبيعيه من قشر الرمان و جذر الشمندر ...!!

اريد اعرف كيف او اذا احد عنده كتاب او معلومه ياريت يفيدني ..
انا حصلت معلومات عن الخطوات الاولى لكن ف نهايه ما فهمت وش ممكن اعمل .. ف ياريت احد يسااعدني ..

وهذا يلي وجدته :
Materials and Method :*
Materials:2.1.1
Pomegranates .

Chemicals: Laboratory grade chemicals-2.1.3
ethanol 95% , copper sulphate and ferrous sulphate.

2.1.4 , Equipments used in the Present
Study:
Weighing balance , Water bath , Soxhlet apparatus , Hot air oven (Thermo lab) ,Colorimeter , UV Trans illuminator (Bioera)

2.2 , Methods
Solvent extraction was used for extracting the dye.
2.2.1 , Preparation of Raw Material
washed the Pomegranates thoroughly with water to remove any impurities. After drying at room temperature, the samples were ground into powder with the help of grinder.

2.2.2 , Extraction of Crude Dyestuff
100 g of sample was weighed and taken in a round bottom flask and 500 ml of solvent (ethanol water) in the ratio 40:60 was added to it. The flask was heated in a water bath at 60°C for 60 minutes .The solution was then filtered to obtain crude dyestuff.


2.2.3 , Purification of Crude Dyestuff
The crude dyestuff is distilled to get 1/3rd of the solution using the Soxhlet apparatus at 70°C for 3hrs. In this process ethanol is recovered and the concentrated dye is obtained. The solution is kept overnight at room temperature for precipitation. The precipitation in ethanol water is obtained by decanting the solution. The obtained particles are dried in the oven overnight at 60°C . Water was added in the soxhlet apparatus. By addition of water, the boiling points of the compounds are lowered, allowing them to evaporate at lower temperatures .
 
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