Ethyl acetate

packed silica all suspended in pure hexane as the solvent. One the column was packed and settled, the crude product was added in. One settled, a 9:1 nonpolar mixture of hexane to ethyl acetate was used to elute the β-carotene and was collected in a pre-weighted Erlenmeyer flask. Next, a 1:1 polar mixture of hexane and ethyl acetate was added to elute the chlorophyll which was also collected in a pre-weighted Erlenmeyer flask. The products were then evaporated with a hot air gun and left…

considerable number of indandiones. [2] Australian researchers compared 1,2-indandione and 5,6-dimethoxy-1,2-indandione to ninhydrin and DFO. [11] Wiesner et al. evaluated the performance of 1,2-indandione (2 g/l in HFE-7100 solvent containing 7% ethyl acetate) on used checks. [13] These research papers concluded that indandione can visualize latent prints as well as or even better than DFO. Like DFO, the indandione do not produce strongly coloured initial print development (typically a pale…

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…

In Experiment 12B we used an umpolung reagent in an umpolung synthesis to synthesize benzoin from benzaldehyde. Umpolung synthesis is a synthetic approach that allows us to switch the identity of a reacting species. For example, the normal chemical reactivity of a nucleophile can be switched to one of an electrophilic compound. Two common agents are cyanide and thiamine (Vitamin B). The mechanisms for both agents are the same. In this experiment, thiamine was used to turn benzaldehyde, an…

Introduction Some esters are used as food flavourings, while other esters are used as fragrances. Esters are a functional group in organic chemistry. They are characterized by a carbon bound to three other atoms: a single bond to a carbon, a double bond to an oxygen, and a single bond to an oxygen (Clark, 2004). The single bond oxygen is bonded to another carbon. Esters can be produced through various synthetic routes. Since, esters are produced from mixing carboxylic acids and alcohols, they…

with an acid catalyst. The equilibrium can be driven to completion by using an excess of either the alcohol or the carboxylic acid, or by removing the water as it forms. The reaction between ethanol and glacial acetic acid formed ethyl ethanoate which is highly flammable. Ethyl ethanoate is then run under FT-IR and its smell is…

In lab, a sample of crude caffeine was purified using the technique of sublimation. Thin layer chromatography (TLC) was used to verify the caffeine's chemical structure and purity. Sublimation played a huge role in the purification of the crude caffeine. The process of sublimation is to take a chemical and change it from a solid phase directly into a vapor. Another reason as to why sublimation was used is because the caffeine can be separated from its contaminant due to the fact that it does…

The purpose of this experiment was to identify the generic name of the unknown drug through thin-layer chromatography analysis. By comparing the Rf values obtained from each TLC plate, it was deduced which components were present in the unknown drug. Through comparison of Table 1 and Table 2, Unknown A was identified as B.C. Tablets. Salicylamide was evident in the unknown substance due to the distinct blue color that was present in both the unknown spot and the salicylamide spot; the similar Rf…

boric oxide and 1.0167g of acetylacetone was prepared and mixed in a 10 mL beaker. The reaction mixture was heated with occasional stirring for 10 minutes. Next, another mixture containing 1.3321g tributyl borate, 3.0005g of vanillin and 15ml of ethyl acetate was prepared in a 50 mL conical flask. The mixture was mixed and a magnetic stirrer was added to the mixture. The mixture was then stirred on a hot plate for 5 minutes at room temperature. After mixing, the boric oxide/acetylacetone mixture…

cobalt (II) nitrate hexahydrate, cobalt (II) thiocyanate, erbium chloride hexahydrate, or palladium (II) acetate. The sixth flask was reserved as a control and only contained PDB. Salcha-1 was incubated on an Innova 5000 shaker at 135rpm for three weeks at room temperature. Fungal Compound Extractions from Salcha-1 and Data Analysis To generate crude extract, approximately 400mL of ethyl acetate was added to each flask to obtain a total volume of 600mL and evaporated…