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Visualisation of mercury vapour

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Visualisation of mercury vapour Traces of mercury vapour are detected on a fluorescent screen (TLC plate, F254) by using a UV light source with λ=254 nm. A small amount of mercury was placed in a petri dish on a heating plate in front of a fluorescent screen illuminated by a short wave UV light source (mercury-vapour lamp), and heated to 50 °C. Since the emission spectrum of the UV light source exactly corresponds to the absorption spectrum of the analyte (mercury vapour), even small amounts (nanogram-s

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