Cold vapour atomic fluorescence spectroscopy

PictureNZ

Christchurch, New Zealand

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I just love the sound of “Cold vapour atomic fluorescence spectroscopy”, so this is what I think it looks like.

Used in the measurement of trace amounts of volatile heavy metals such as mercury, cold vapour AFS makes use of the unique characteristic of mercury that allows vapour measurement at room temperature. Free mercury atoms in a carrier gas are excited by a collimated ultraviolet light source at a wavelength of 253.7 nanometres. The excited atoms re-radiate their absorbed energy (fluoresce) at this same wavelength.

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