2.) Propose an addiotional analysis that you could use to differentiate the star

Question

2.) Propose an addiotional analysis that you could use to differentiate the starting material (oil) from the product (biodiesel).

Experiment 22 Synthesis and Analysis of Biodiesel using IR (Infrared Spectroscopy) and GC- (Gas Chromatography- Mass Spectrometry) Introduction Biodiesel is a renewable diesel fuel consisting of fatty-acid alkyl esters known as fatty acid methyl esters (FAME). These fatty-acid alkyl esters are found in vegetable oils and animal fats, which are made of triglycerides. It is synthesized by replacing glycerol with a short chain alcohol such as methanol or ethanol in a process known as transesterification. During this process, the alcohol is deprotonated with a base, sodium hydroxide (NaoH) to make it a stronger nucleophile. The organically derived oils combine with the solution (sodium hydroxide and methanol) to give fatty esters such as methyl ester In this experiment, vegetable oil will be reacted with a mixture of methanol and sodium hydroxide to produce biodiesel H2C-OH H3COC-R H2C-O TC-R1 3 CH2O H3Coc-R2 Nook R3 H2C-OH HaCOC- R3 H2C-o glycerol 3 molecues of oil: ester of a fatty acid and glycerol biodiesel

Explanation / Answer

NMR spectroscopy can be employed to differentiate the starting material from the product. Apart from normal proton and 13C NMR we can also employ correlation NMR spectroscopy techniques to elucidate the structure of each product

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