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. Author manuscript; available in PMC: 2021 Jul 15.
Published in final edited form as: Drug Test Anal. 2020 Jun 10;12(8):1109–1125. doi: 10.1002/dta.2813

Figure 8.

Figure 8.

Top. HPLC-MS analysis of underivatized APBT isomers. Middle. HPLC-MS analysis of methanesulfonamide (MSA) derivatives. Bottom. HPLC-QTOF-MS analysis of underivatized APBT isomers.