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Electropherogram obtained using a 1 μM solution of DA and CAT, a 5-s injection at 5 kV, a 25-kV separation potential and a 10 mM TES (pH = 7.2) separation buffer with 5 % 1-propanol in a 13 μm i.d. capillary with a capillary outlet etch length of 55 μm and a 30-μm diameter carbon fiber microelectrode flame-etched and blunt cut to a 10 μm tip.
