. Author manuscript; available in PMC: 2019 Dec 11.

Published in final edited form as: Anal Chim Acta. 2018 Mar 10;1037:274–280. doi: 10.1016/j.aca.2018.02.057

Table. Analytical Figure of Merit.

Thiols standards (25 μM) were tagged with either t-butyl maleimide or cyclohexyl maleimide and mixed at varying ratios: 10:1, 5:1, 3:1 1:1, 1:3, 1:5 and 1:10.

Thiol	Sensitivity/Slope (5:1 -1:5 ratio)	R² (5:1 -1:5 ratio)	Sensitivity/Slope (10:1 -1:10 ratio)	R² (5:1 -1:5 ratio)
Cysteine	1.60	0.999	1.05	0.915
Homocysteine	1.78	0.986	1.19	0.918
Penicillamine	1.92	0.979	1.35	0.937
Cys-Gly	1.28	0.958	1.18	0.985
Glu-Cys	1.25	0.979	0.88	0.935
GSH	1.07	0.985	0.90	0.983