. Author manuscript; available in PMC: 2021 Jun 21.

Published in final edited form as: Anal Chem. 2020 Apr 13;92(9):6587–6597. doi: 10.1021/acs.analchem.0c00349

Table 1. Top weighted peaks from each ROI in spot 38 (isodecyl acrylate) with peak assignments and weighting ratios.

Region	Peak m/z	Assignment	Weight in ROI 1 (%)	Weight in ROI 2 (%)	Ratio	Region	Peak m/z	Assignment	Weight in ROI 2 (%)	Weight in ROI 1 (%)	Ratio
ROI 1	71.01	C₃H₃O₂ ^-	2.91	2.35	1.24	ROI 2	71.01	C₃H₃O₂ ^-	2.35	2.91	0.81
	81.04	C₅H₅O^-	2.65	2.00	1.32		81.04	C₅H₅O^-	2.00	2.65	0.76
	155.09	C₉H₁₅O₂ ^-	2.62	1.92	1.36		155.09	C₉H₁₅O₂ ^-	1.92	2.62	0.73
	41.01	C₂HO^-	2.02	1.69	1.19		85.04	C₄H₅O₂^-	1.86	0.38	4.92
	67.02	C₄H₃O^-	1.8	1.42	1.27		55.02	C₃H₃O^-	1.77	1.28	1.38
	95.05	C₆H₇O-	1.42	1.16	1.22		41.01	C₂HO^-	1.69	2.02	0.84
	43.02	C₂H₃O^-	1.39	1.27	1.1		67.02	C₄H₃O^-	1.42	1.80	0.79
	51.02	C₄H₃ ^-	1.36	1.16	1.17		61.04	C₂H₅O₂^-	1.34	0.15	9.24
	111.05	C₆H₇O₂-	1.33	1.17	1.14		59.02	C₂H₃O₂^-	1.29	0.32	4.00
	69.04	C₄H₅O^-	1.32	1.05	1.25		43.02	C₂H₃O^-	1.27	1.39	0.91
	55.02	C₃H₃O^-	1.28	1.77	0.72		111.05	C₆H₇O₂-	1.17	1.33	0.88
	49.01	C₄H^-	1.19	1.13	1.06		95.05	C₆H₇O^-	1.16	1.42	0.82
	38.02	C₃H₂ ^-	1.06	1.00	1.06		49.01	C₄H^-	1.13	1.19	0.95
	79.02	C₅H₃O^-	1.04	0.91	1.14		69.04	C₄H₅O^-	1.05	1.32	0.8
	13.01	CH-	1.03	0.89	1.16		25.01	C₂H^-	1.04	1.22	0.85
	53.04	C₄H₅ ^-	1.00	0.79	1.27		45.00	CHO₂ ^-	1.00	0.83	1.2