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. 2023 Jul 25;12(1):A0128. doi: 10.5702/massspectrometry.A0128

Fig. 3. Influence of matrix in vivo. The standard solution was spotted on ITO glass (standard), a mixture of standard and mimic tissue mix was spotted on ITO glass (standard/mimic mix), and the standard solution was spotted on a section of Cc (standard on Cc). For standard and standard on Cc, standard solutions were prepared in ultrapure water to have the same final concentration as that of standard/mimic mix. “Standard” and “standard on Cc” indicate the ratio of water : standard solution; “standard/mimic mix” indicates the ratio of mimic sample : standard solution. (A) Differences in TPP-DA peak intensity for each sample according to the mixing ratio. (B) Ionic strength ratio of standard/mimic mix to standard on Cc. Cc, cerebral cortex; DA, dopamine hydrochloride; ITO, indium–tin–oxide; TPP, triphenylpyrylium tetrafluoroborate.

Fig. 3. Influence of matrix in vivo. The standard solution was spotted on ITO glass (standard), a mixture of standard and mimic tissue mix was spotted on ITO glass (standard/mimic mix), and the standard solution was spotted on a section of Cc (standard on Cc). For standard and standard on Cc, standard solutions were prepared in ultrapure water to have the same final concentration as that of standard/mimic mix. “Standard” and “standard on Cc” indicate the ratio of water : standard solution; “standard/mimic mix” indicates the ratio of mimic sample : standard solution. (A) Differences in TPP-DA peak intensity for each sample according to the mixing ratio. (B) Ionic strength ratio of standard/mimic mix to standard on Cc. Cc, cerebral cortex; DA, dopamine hydrochloride; ITO, indium–tin–oxide; TPP, triphenylpyrylium tetrafluoroborate.