Abstract
Small amounts of lead can be immediately detected on chromatograms (0.2-0.3 μg on cellulose thin layers and about 0.4 μg on paper) as the fluorescent [PbCl 4] 2− complex (excitation maximum 254 nm; emission maximum 480 nm). Quantitative determinations can be made by diffuse reflectance measurement at 254 nm. This method was utilized for the determination of lead in used lubricating oils. The analytical range could be extended virtually to the detection limits of fluorescence.
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