Solvent

Observations or reactions: Separation of the basic component: When 2ml of 3M HCl was added to the mixture of Benzoic acid, Ethyl 4-aminobenzoate, 9-Fluorenone, diethyl ether, two layers were created, an organic yellow top layer and a clear aqueous bottom layer. The clear layer (basic layer) was extracted and placed into a container where 6M NaOH was add to the solution. The addition of NaOH made the solution basic, and created white flakes in the solution. The white flakes were separated by…

Two chromatographic methods were developed for the assay of the FDA approved lozenges containing dextromethorphan hydrobromide (DXT) and menthol (MNT). The first was a green HPTLC method which depends on using Merck HPTLC aluminum sheets of silica gel 60 F254 and methanol-ammonia (10:0.1, v/v) as mobile phase. This was followed by densitometric measurements of the spots which were retained at 0.28 ± 0.01 for DXT and 0.76 ± 0.02 for MNT scanned at 210 nm. The method was found linear over the…

Determining Percent Composition of Unknown Copper Ore Sample Iodine-thiosulfate Method: An Analytical Method The objective of this experiment is to eliminate all interfering species from a sample of unknown copper ore in order to later determine pure copper content. Copper ore can be found in a mineral that contains pure copper and other species that is mined and can later have copper extracted from them (Taher, 1999). To eliminate all interfering species, such as Iron, Arsenic, and…

terephthalate instead of part of phthalic anhydride prepared Polyester resin with the excellent flexibility. He then used sol-gel technology to prepare silicone-modified polyester resin. The properties of the coting film, such as hardness, flexibility, solvent resistance and adhesion were studied and optimized. When compared with commercially available coloured polyester coating SM 3911, the flexibility, adhesion, rigidity , MEK resistance and acid-resistance of the prepared coating were found…

cost of the raw materials involved in the extraction of the biomolecule from the crude is extremely economical. The RME system is greatly influenced by a number of parameters such as the pH, the type of salt used and its concentration, the type of solvent used, the type of surfactant used and its concentration, water content and volume ratio of the aqueous phase to the organic phase (Liu et al, 2008). The diffusion of biomolecules inside the micelles is governed by electrostatic, steric and…

After the mass of the crude product was measured, the recrystallization was done for more purification; the solution looked clear prior to it’s cooling to room temperature. After the solution cooled to the room temperature and vacuum filtration was done again on recrystallization product, the solution was a white shiny with crystalline solid appearance. The melting point of the Meta-Methyl nitrobenzoate product formed was at 76.2 ‐ 78°C. The appearances of the TLC for the crude product, starting…

Preparation of polyallyl polyether of allyl sucrose Abstract: Allyl sucrose is prepared by using sucrose, allyl chloride, NaOH and DMSO. This novel method is less time consuming and required less solvent than other methods. The product is characterized by Fourier Transform Infrared (FT – IR), 1H-NMR and MASS Spectrometer. Key words: allyl sucrose, allyl chloride, sucrose Introduction: Allyl sucrose is used for…

same procedure mentioned above. The experiments were carried out at three types of organic solvents for lipophilic fractions (ethyl acetate, hexane, 50% acetone in water) and four types of solvent for hydrophilic fractions (0.1M phosphate buffer pH7.4, acetone: water: acetic acid (70:29.5:0.5), 50% methanol in water, 7% acetic acid in 80% methanol). The amount between solid (sample) and liquid (organic solvents) was carried out at the ratios of 1:10, 1:15, 1:20 and 1:25 g:mL. The ultrasonication…

Hey Mom, I know you’re dying to know how my semester is going so I thought I’d share with you some of the assignments I’ve been working on. I just finished my first chemistry lab project involving drugs! Yes, drugs, but not the ones you’re thinking about. We worked with Sulfanilamide, Phenacetin, Acetaminophen, and your favorite, Caffeine. The goal for the experiment was to determine where the drugs may reside according to their properties. We learned that there are parts in the cell that are…

exist in solid forms. 3, 4, 5-substituted 1, 2, 4-triazole derivatives melts on thermolysis when heated at high temperature3160C for half an hour. 1, 2, 4-Triazole derivatives are easily soluble in polar solvents and slightly soluble in non-polar solvents. However the solubility in non-polar solvents can be enhanced by substitution on the nitrogen atom.[[3]]The triazole ring is a frequent moiety present in various drugs such as Azosemide (diuretic), Brotizolam (appetite stimulant), Cefetrzine…