Separation of Metal-DDTC Complexes

which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Micellar electrokinetic chromatography (MEKC) was examined for the separation and determination of Mo(VI), Cr(VI), Ni(II), Pd(II), and Co(III) as diethyl dithiocarbamate (DDTC) chelates. The separation was achieved from fused silica capillary (52 cm × 75 µm id) with effective length 40 cm, background electrolyte (BGE) borate buffer pH 9.1 (25mM), CTAB 30% (100mM), and 1 % butanol in methanol (70: 30: 5 v/v/v) with applied voltage of −10 kV using reverse polarity. The photodiode array detection was achieved at 225 nm. The linear calibration for each of the element was obtained within 0.16–10 µg/mL with a limit of detection (LOD) 0.005–0.0167 µg/mL. The separation and determination was repeatable with relative standard deviation (RSD) within 2.4–3.3 % (n = 4) in terms of migration time and peak height/peak area. The method was applied for th