Abstract
Speciation of inorganic lead (PbII), triethyllead chloride (TEL), triphenyllead chloride (TPhL) and tetraethyllead (TTEL) was investigated using gradient high-performance liquid chromatography (HPLC) with detection by inductively coupled plasma mass spectrometry (ICP-MS). Ion-pair reversed-phase chromatography was used. The detection limits were 0.37, 0.14, 0.17 and 3.9 ng of Pb for PbII, TEL, TPhL and TTEL, respectively. The reproducibility of peak height measurements ranged from 3.1 to 4.2%(relative standard deviation). The method was evaluated by analysing National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 2715 Lead in Reference Fuel for tetraethyllead and a water Quality Control Sample from the Environmental Protection Agency for inorganic lead. Both the direct solution nebulization and HPLC–ICP-MS results compare favourably with reference values. The applicability of the method to other alkyllead compounds is discussed.
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