As can be seen from Fig. 2(A), the most abundant fragment at m/z 208 or m/z 211 is 10-methylacridone cation which can be expressed as [d0-MA]+ or [d3-MA]+.
And the MRM transitions of [M+H]+?[MA]+ were used for quantification analysis in our experiments.
In addition, the whole HPLC–MS/MS run were divided into three segments.
Segment I is set to waste, avoiding high concentration of 10-methyl-acridone-2-sulfonyl acid (MASC-OH) contaminate ion source.
Segment II and III are set to source, acquiring MRM signals of BAs derivatives