How is the molecular weight of a fatty acid determined?
Saponification value
The correct answer is Saponification value.
Techniques like Gas Chromatography (GC) or Gas Chromatography-Mass Spectrometry (GC-MS) are widely used in analytical chemistry to separate and identify individual fatty acids in a sample (often after converting them to methyl esters) and determine their relative proportions. From this composition, the average molecular weight can be calculated accurately. However, among the classical chemical methods listed in the options, the saponification value is the one directly related to the average molecular weight of the fatty acids in a fat or oil sample.
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