Therefore, all samples were acidifed (0.01MQ-HCl), and the pH was only adjusted in-line using ammonium acetate buffered at pH 5.5 immediately prior to adsorption onto the 8-HQ column.
Therefore, all samples were acidifed (0.01MQ-HCl), and the pH was only adjusted in-line using ammonium acetate buffered at pH 5.5 immediately prior to adsorption onto the 8-HQ column.