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I still would prefer a bit more explanation from the authors regarding my comment when ammonium formate was used as mobile phase additive, because as the authors mentioned, there will be [M+45]- adduct present together with [M-H]-, although the relative intensity changed as FV value increased. Considering different MS signal response for different analytes, should the intensity of this [M+45]- adduct also be counted, together with the intensity contribution from [M-H]-, to quantify the absolute total amount of a specific analytes? Would it make sense to add a column in Table 5 of the relative quantitative analysis rather than absolute quantitation (i.e., % of each individual triterpene acids in FLP and BFL, respectively), so that the difference of FLP and BFL is more evident to read?
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