ANALYTICAL CHEMISTRY INVENTIONS 1. Spectrophotometry (19th century) -Spectrophotometry is considerd as a powerful tool for chemical analysis as it is a scientific technique which can be used to measure the interaction between light and matter. -It functions by measuring the amount of light which can be absorbed or transmitted by a sample, that can provide valuable information about the sample's composition, concentration, and properties. -It works on the following Principle: • Light source : Lamp or laser are used as a light source which emits a beam of light and that beam is directed towards the sample. • Sample preparation :Dissolving a sample in a solvent or placing it in a specialized container give us a prepared sample for observation. • Light absorption or transmission : As soon as the light beam interacts with the sample, the amount of light absorbed or transmitted is measured. • Detector : Photodiode or photomultiplier tube devices are used to...
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