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. Author manuscript; available in PMC: 2022 Sep 30.
Published in final edited form as: Trends Analyt Chem. 2021 Feb 25;139:116240. doi: 10.1016/j.trac.2021.116240

Fig. 8.

Fig. 8.

Extracted ion electropherograms of 20 DL-AAs (20 μg/ml) obtained in a positive ESI mode using CCE-MS. BGE: 30 mM (+)-18C6H4 in water at 24 kV of a normal polarity by the partial filling technique. The separation buffer was injected at 50 mbar for 17 min to fill 70% of the capillary. The ions extracted for the AAs were [M+H]+. Reproduced from [26] with permission from Elsevier, copyright 2019.