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A. Total ion chromatogram (TIC, scan mode) of a 10 mg L−1 choline chloride(tr = 5.21) standard in aqueous solution. B. Signal to noise ratio experiment in TIC of a blank sample. C. Fragmentor voltage cycling from 20 to 160 V using flow injection analysis. D. Extinction experiment in TIC mode to determine sensitivity, 0.63 mg L−1 choline(tr = 5.11) standard solution.
