Fig. 4. Chromatograms of the mixture of (a) di- or (b) tri-brominated benzenes with the C70-coated column (the C70-coated, Type-2). Conditions: column, C70-coated (Type-2, 75.0 cm × 100 μm i.d.); flow rate; 2.0 μL min^–1; mobile phase, n-hexane; temperature, 25 °C; detection, UV 228 nm.