A high-performance liquid chromatographic system equipped with on-line reducer, clean-up and concentrator columns for determination of trace levels of nitropolycyclic aromatic hydrocarbons in airborne particulates
K. Hayakawa et al., A high-performance liquid chromatographic system equipped with on-line reducer, clean-up and concentrator columns for determination of trace levels of nitropolycyclic aromatic hydrocarbons in airborne particulates, ANALYT CHIM, 445(2), 2001, pp. 205-212
A HPLC system with on-line reducer, clean-up and concentrator columns has b
een developed for determining nitropoly-cyclic aromatic hydrocarbons (NPAHs
). Maximum efficiency of the reducer column (Pt/Rh-coated alumina) was achi
eved after the column was activated with a flow of air/hydrogen at 350 degr
eesC for 3 h and when ethanol-acetate buffer was used as the sample carrier
solution. After a benzene-ethanol extract from airborne particulates was w
ashed with sodium hydroxide, sulfuric acid and water, an aliquot was inject
ed into the system. NPAHs were separated from interfering substances by the
clean-up column and reduced to their amino derivatives by the reducer colu
mn. The derivatives were concentrated on the concentrator column and eluted
into the separator column. NPAHs such as 1,3-, 1,6-, 1,8-dinitropyrenes an
d 1-nitropyrene were determined chemilumigenically with linear calibration
graphs from I x 10(-11) to 1 x 10(-8) and I x 10(-10) to I X 10(-7) M, resp
ectively, at an injection volume of 100 mul. These NPAHs in airborne partic
ulates were determined by the proposed method. (C) 2001 Elsevier Science B.
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