Table 1.

LC-MS/MS acquisition parameters for the target synthetic dyes.

Compound	Precursor ion (m/z)	Product ion (m/z)	Declustering potential (V)	Entrance potential (V)	CEP (V)	Collision energy (V)	CXP (V)
Sudan Orange G	215.1	93.1	31	8	30	31	4
	215.1	122.1	31	8	30	21	4
Dimethyl Yellow	226.1	120.1	41	8.5	30	43	4
	226.1	105.1	41	8.5	30	25	4
Sudan I	249.1	93	26	4.5	30	33	4
	249.1	156.1	26	4.5	30	21	4
Sudan II	277.1	121.1	26	4.5	30	25	4
	277.1	106.1	26	4.5	30	55	4
Sudan Red G	279.1	123.1	26	4.5	30	23	4
	279.1	108.1	26	4.5	30	47	4
Para Red	294.1	156.1	31	5	30	21	4
	294.1	128.1	31	5	30	35	4
Sudan III	353.1	197.1	51	10.5	30	27	4
	353.1	128.1	51	10.5	30	51	4
Sudan Red 7B	380.2	183.1	31	9	30	21	4
	380.2	115.1	31	9	30	65	4
Sudan IV	381.1	224.1	51	9	30	31	4
	381.1	225.1	51	9	30	25	4
	381.1	143.1	51	9	30	37	4
	381.1	104.1	51	9	30	83	4
Sudan Red B	381.2	224.1	56	10	30	29	4
	381.2	225.1	56	10	30	29	4
	381.2	156.1	56	10	30	27	4
	381.2	134.1	56	10	30	27	4
Fast Garnet GBC	226.1	91	46	9.5	30	29	4
	226.1	107	46	9.5	30	31	4
Fast Green FCF	381	80	−40	−10	−33	−98	−8
	381	170	−40	−10	−33	−38	−8
Tartrazine	244	80	−21	−10	−29.5	−62	−8
	244	198	−21	−10	−29.5	−20	−8
New Coccine	206	80	−35	−10	−28.4	−40	−8
	268	206	−25	−10	−30	−18	−8
Indigo Carmine	226	198	−42	−10	−29	−27	−8
	226	105	−42	−10	−29	−53	−8
Brilliant Blue	373	80	−45	−10	−33	−92	−8
	373	170	−45	−10	−33	−42	−8
Sunset Yellow	203	171	−27	−10	−28	−20	−8
	203	207	−27	−10	−28	−20	−8
Erythrosine	834	227	−22	−10	−45	−91	−8
	834	127	−80	−10	−45	−84	−8
Allura Red	225	80	−32	−10	−29	−59	−8
	225	136	−32	−10	−29	−34	−8
Amaranth	279	206	−32	−10	−30	−30	−8
	279	221	−32	−10	−30	−22	−8

CEP = collision cell entrance potential; CXP = collision cell exit potential; LC-MS/MS = liquid chromatography/tandem mass spectrometry.