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. 2016 Dec 1;11(12):e0167502. doi: 10.1371/journal.pone.0167502

Fig 2. Response ratio of the ESI signal intensity at pH 3 and pH 7 in dependency on basicity.

Fig 2

The response of every analyte in aqueous solution (pH 7) is compared to a solution adjusted to pH 3 by formic acid, analyzed for the whole set of analytes in 80% ACN on the API 2000.