Silica gel

According to Simon (2002) the silica gel is the most widely used absorbent and it is the stationary phase that is dominant in Thin layer chromatography, particles or molecules that are non-polar travel faster at the stationary phase and the molecules that are polar spend more time at the stationary phase and therefore this means that molecules that are non-polar travel larger distance on the TLC plate in comparison to molecules that are polar since the polar molecules stick to the polar stationary phase (gel silica plate). According to Mary (1996) the molecules or substances move or travel up the stationary phase by means of capillary action and the stationary phase is polar because of the -OH groups which are polar and are bound to the silica…

What is silica gel New shoes, Pill bottles, Beef jerky, New purse, new backpacks. Silica gel is the little packages inside of products that were listed . Silica gel is to keep moisture out of those objects. Silica gel keeps the moisture from the product so it can stay dry. Silica gel can be in numerous places they can be even bought online. What does silica gel do Little packs of silica are(desiccant) means is a drying agent something that drys objects and absorbs the the…

It was found to be an adsorbent of vapor and gases in canisters. The method of producing silica gel was patented in 1918 by Walter A. Patrick , a chemical professor at John Hopkins University. 2.2.2 SYNTHESIS OF SILICA GEL 2.2.2. a) USING KAOLIN BY-PRODUCT The synthesis process (D. Brahmia 2014) was carried out in two steps namely, (1)Metasilicate sol preparation and (2) Metasilicate destabilization with acid. In the first step, a mixture of sodium carbonate and sand were heated…

intended results, vacuum filtration, recrystallization, Thin-layer chromatography, melting points, infrared spectroscopy, and column chromatography were used. Vacuum filtration was used to isolate the organic solid. Recrystallization was performed by dissolving the crude product in a small amount of hot solvent and then cooling it down in order for the crystals to form. The crystals are dried and column chromatography can be performed. Column chromatography is performed in order to separate…

The banana-yellow coloured solution was stirred for 30 minutes, then 1 (6.00 g, 1 equiv, 45.4 mmol) was slowly added over 30 minutes, resulting in a milky brown solution colour. The solution was stirred for a further 18 hours following which two aliquots of hexanes (100ml) were added. The solution was filtered through a pad of silica, and then concentrated in vacuo and the product was purified by column chromatography (10% ethyl acetate in hexanes) to give a colourless oil (1.21 g, 9.30 mmol)…

Testing of antibiotics and determining the pollutants in water: Done to verify purity of water and to test antibiotics to see if it is capable of doing its job. Used in DNA and RNA fingerprinting: Done in pathological laboratories to detect the presence of alcohol or chemicals in blood and also for crime scene investigations (forensic evidence). Used in the separation of amino acids, carbohydrates, fats, vitamins, and more: Done for extensive research and even medical purposes. Thin Layer…

fluorene and fluorenone. Thin layer chromatography is a useful separation method when the components of a mixture are in question. Analyzing what the mixture consist of can be efficiently determine by TLC by calculating Rf and comparing these values. For the separation and isolation of a mixtures components, this method is extensive and not as efficient at column chromatography. This conclusion is represented in the data gathered. For TLC, a percent yield of 158.48% was acquired for fluorene and…

surface of the tablet swells to form a gel layer which exhibits a gelatinous shape (Wilson and Crowley, 2011). This gel layer formed will govern the rate at which drug is released from the tablet (Shah, Chaudhary and Mehta, 2014) and it can be concluded that drug release for hydrophilic tablets are governed by swelling of the polymer rather than erosion. But there is also another factor that affects release which is the rate at which hydration occurs, this factor is controlled by the structure…

then placed under a stereomicroscope for analysis. Lighting for experiments is provided by a 1000 lumen LED lightbulb. Usage of an LED lightbulb ensures that minimal heat will be introduced to the device and the output of light remains constant, ensuring that all pictures are exposed to the same degree of lighting which is a requirement for effective image analysis. Once all of the settings have been in place fluid will be passed through the device and pictures of the system will be taken at…

Bovine serum albumin (BSA) is usually used for generation of nanoparticles (NPs) in drug delivery systems. This paper presents a study on the simple coacervation method for fabrication of BSA nanoparticles.An artificial neural network (ANN) model was developed to predict the diameter of nanoparticles based on experimental data. Effect of pH, temperature, initial BSA and cross linker concentration, molar ratio of BSA to ethanol, agitation rate and rate of ethanol addition were investigated on the…