An Environmentally Friendly Compact Microfluidic Hydrodynamic Sequential Injection System Using Curcuma putii Maknoi & Jenjitt. Extract as a Natural Reagent for Colorimetric Determination of Total Iron in Water Samples

Table 2

Characterization of compounds from Curcuma putii Maknoi & Jenjitt. extract by the LC-MS analysis.

No	Proposed compounds	Retention time	Formula	Molecular	m/z
				Weight
1	1,5-anhydro-1-[5,7-dihydroxy-2-(4-hydroxyphenyl)-4-oxo-4H-chromen-8-yl]-2-O-[(2E)-3-(4-hydroxyphenyl)-2-propenoyl] hexitol	3.67	C30H26O12	578.1420	577.1346
2	Catechin	3.69	C15H14O6	290.0787	289.0715
3	p-coumaric acid glucoside	3.76	C15H18O8	326.0999	325.0927
4	1-naphthol glucuronide	3.76	C16H16O7	320.0893	319.0820
5	(+)-gallocatechin	3.77	C15H14O7	306.0737	305.0664
6	Sinapinic acid-O-glucuronide isomer	3.99	C17H20O11	400.1004	399.0931
7	Heptaethylene glycol	4.13	C14H30O8	326.1940	349.1832
8	Catechin	4.32	C15H14O6	290.0789	289.0716
9	8-O-methylfusarubin	4.50	C16H16O7	320.0894	319.0820
10	p-coumaric acid glucoside	4.54	C15H18O8	326.0999	325.0927
11	3,5,6,7-Tetrahydroxy-2-(4-hydroxyphenyl)-2,3-dihydro-4H-chromen-4-one	4.66	C15H12O7	304.0583	303.0510
12	Leucyl-leucyl-norleucine	4.67	C18H35N3O4	357.2627	358.2700
13	Epiafzelechin	4.68	C15H14O5	274.0841	275.0913
14	Guibourtinidol-(4alpha->6)-catechin	4.72	C30H26O10	546.1523	545.1449
15	3,4-methylenesebacic acid	5.32	C12H18O4	226.1205	249.1097
16	Miquelianin	5.37	C21H18O13	478.0745	477.0671
17	Isoquercetin	5.44	C21H20O12	464.0954	463.0880
18	Rutin	5.47	C27H30O16	610.1527	609.1455
19	Bergaptol	5.62	C11H6O4	202.0265	201.0192
20	Trifolin	5.66	C21H20O11	448.1005	447.0931
21	Flaviolin	5.78	C10H6O5	206.0215	205.0143
22	7-hydroxy-9-methoxy-6-(1,3,4-trihydroxy-2-butanyl)-1,2-dihydrocyclopenta[c]chromene-3,4-dione	5.95	C17H18O8	350.0997	349.0925
23	Dodecyltrimethylammonium	5.99	C15H33N	227.2612	228.2685
24	Bis(2-ethylhexyl) amine	6.09	C16H35N	241.2766	242.2839
25	3-tert-butyladipic acid	6.19	C10H18O4	202.1206	201.1133
26	Prometryn	6.93	C10H19N5S	241.1363	242.1436
27	3-oxolauric acid	6.97	C12H22O3	214.1569	237.1461
28	trans-2-Dodecenoylcarnitine	7.29	C19H35NO4	341.2566	342.2639
29	N,N-Bis(2-hydroxyethyl)dodecanamide	7.70	C16H33NO3	287.2461	310.2354
30	3,5-di-tert-Butyl-4-hydroxybenzaldehyde	7.88	C15H22O2	234.1620	235.1693
31	10,16-dihydroxyhexadecanoic acid	8.41	C19H38N2O3	342.2882	343.2955
32	(Similar to: (1S,8S,9S,10S,13R)-6,9,10-trimethyl-2-oxo-4,14-dioxatetracyclo-tetradeca-3(7),5-dien-8-yl acetate; Δmass: 38.1571 Da)	8.42	C15H29NO	239.2249	240.2322
33	(Similar to: (1S,8S,9S,10S,13R)-6,9,10-trimethyl-2-oxo-4,14-dioxatetracyclo-tetradeca-3(7),5-dien-8-yl acetate; Δmass: −64.9062 Da)	8.53	C20H26O4	330.1831	329.1758
34	5,5′-diisopropyl-2,2′-dimethyl-3,3′,4,4′-biphenyltetrol	9.58	C16H33NO	255.2560	256.2633
35	Hexadecanamide	9.72	C19H38O4	330.2770	353.2662
36	L-α-PALMITIN	9.91	C24H38O4	390.2769	413.2661
37	Bis(2-ethylhexyl) phthalate	9.94	C18H34O2	282.2559	281.2486
38	Oleic acid	10.39	C37H67O8P	670.4573	669.4496
39	(2R)-1-(Palmitoyloxy)-3-(phosphonooxy)-2-propanyl (9Z,12Z,15Z)-9,12,15-octadecatrienoate	10.46	C29H50O3	446.3760	469.3651
40	13-hydroxy-alpha-tocopherol	10.79	C29H48O3	444.3591	477.3917