Ethanol

first under shade in room temperature and secondly in a hot-air oven for complete drying at 50-60˚C. The dried fruits were made into coarse powder by grinding and stored in labelled bottles for further study and extracted with organic solvents like Ethanol. Fresh thorns also grinded and extracted with same extract. Preparation of aqueous, methanolic and ethanolic extracts of fresh and dried fruits of Tribulus terrestris Linn. The fresh fruits of Tribulus terrestris Linn. were weighed out and…

I. Abstract The experiment was about using a method of recrystallization to reform benzoic acid and unknown compound, and identifying that compound. The main principle is the polarity and solubility of compound. The compound was dissolved completely with distilled water in hot temperature and reformed back in cold environment. After the experiment, there were up to more than 50% of the compound being recrystallized and the unknown compound had the melting point at 165.2oC. The experiment…

the sake of extraction, spinach is first dehydrated with 100% ethanol so that extraction is more efficient. It is then extracted using dichloromethane (DCM) and maceration. The chlorophyll and β-carotene pigments are dissolved into the organic DCM layer which is polar and does not mix with water. The solution is then washed with sodium chloride (NaCl) to draw out any remaining water left in the solution that was not dried out by the ethanol. [1] Water will move toward the more hypertonic…

drained well and recrystallised using Ethanol. Scheme-2: Synthesis of N-substituted Tetrahydrocarbazoles Suspended 1 gm (0.07 mol) of substituted tetrahydrocarbazole in 20 mL of 10% NaOH solution into a well corked conical flask and add 2 mL of substituted acid chloride with constant shaking for 10 min. until the odour has disappeared and then it was cooled. Filtered and washed the synthesized N-Substituted derivative using water and recrystallized with ethanol. Computational…

RESULTS SOLUBILITY ANALYSIS: Ketoprofen sample was found to be soluble in ethanol, Chloroform, ether, acetone at neutral pH and is found to be almost insoluble in water. Solubility analysis is important because the drug has to dissolve in the solvents and also in the dissolution medium used. MELTING POINT DETERMINATION: The melting point of the Ketoprofen was found to be 96˚C by open capillary tube using microcontroller based melting point apparatus which is within the reported range of 94˚C…

Aims: The objectives of this experiment are to carry out the process of synthesising aspirin and reinforce both the skills of recrystallisation and melting point determination. In this experiment, we are supposed to measure the amount of aspirin collected to calculate the percentage yield of aspirin. Apart from that, we are also required to find the melting point of aspirin. Introduction: 1.1: aspirin Aspirin, also known as acetylsalicylic acid, is an aromatic compound containing both a…

During the extraction process, the sand bath was set to 20℃. The 1.00 gram of ground nutmeg was transferred to the round-bottom flask (RBF) using the plastic funnel. Three milliliter of tert-butyl methyl ether and two or three boiling chips were added into the flask. The black plastic connector was used just like the distillation column with air condenser set-up. The flask was clamped to the ring stand using 3-pronged clamp. The flask was lowered into a slightly depression in the sand without…

It is typically assumed that all tequilas are the same 100 % agave drinks although remarkable part of them are actually mixed spirits. There have been a few attempts to study the composition of tequila samples using gas chromatography and headspace solid-phase microextration but these techniques have proved to be too costly for routine analysis. Lachenmeier and colleagues observed that the authentic tequila research required more advanced and affordable method for separating the 100 % agave…

2. Experimental 2.1. Materials and reagents Analytical grade bentazon was purchased from Sigma-Aldrich. Acetonitrile, methanol, ethanol, chloroform and acetic acid were purchased from Merck and were analytical or HPLC grade. Methacrylic acid (MAA) as the functional monomer, ethylene glycol dimethacrylate (EDMA) as the cross-linker and α,α′-Azoisobutyronitrile (AIBN) were purchased from Merck (Hohenbrunn, Germany). MAA was distilled under vacuum to remove the inhibitor prior to polymerization.…

comparison. The kinetics model assumes that the yeast both consume and hydrolyze the sucrose into glucose and fructose. The rate of sucrose hydrolysis is shown on Eq. 1 below. One mole of glucose or fructose (180 g/mol) will be fermented to two moles of ethanol (46 g/mol) and two moles of carbon dioxide (44 g/mol). The reaction pathway for the biochemical conversion of sucrose is supposed to follow the pathway shown by Figure 2.…