Abstract
An analytical method is proposed to determine trace heavy metals chromium, nickel, mercury, arsenic, and lead in tipping paper and As and Pb in cigarette filters using monochromatic wavelength X-ray fluorescence spectrometry. It is very difficult to determine trace heavy metals by traditional energy-dispersive X-ray fluorescence spectrometry because of its high noise and low peak area. A MWXRF spectrometer was assembled with a LiF(420) double curved crystal and microfocal X-ray tube. High count X-ray was simultaneously generated and focused by LiF(420) DCC. With pressing pretreatment, the signal to background ratio was significantly improved. There was a good linear relation between the intensity by MWXRF and heavy metal content by ICP-MS and AAS. The limits of detection of the heavy elements were lower than 1.0 μg/g. A batch of cigarette tipping papers and filters were analyzed, there were only few heavy metals with low contents in the tipping paper and filters.
Published Version
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