Fig. 7From: Laser desorption/ionization mass spectrometry of L-thyroxine (T4) using combi-matrix of α-cyano-4-hydroxycinnamic acid (CHCA) and grapheneQuantitative analysis of T4 spiked in serum using MALDI-TOF MS based on the combi-matrix. a Spectra of MALDI-TOF MS based on the combi-matrix composed of alpha-cyano-4-hydroxycinnamic acid (CHCA) and graphene. b Standard curves for the analysis of T4 using MALDI-TOF MS based on the combi-matrix composed of CHCA and graphene. c The Mann–Whitney test T4 analysis using MALDI-TOF MS based on the combi-matrix composed of CHCA and grapheneBack to article page