## 4 Conclusions
The following are available online at [[http://www.mdpi.com/2076-3417/10/18/6369/s1](http://www.mdpi.com/2076-3417/10/18/6369/s1)]([http://www.mdpi.com/2076-3417/10/18/6369/s1](http://www.mdpi.com/2076-3417/10/18/6369/s1)), Figure S1: Chromatograms showing retention time for phenolic acids identified in organic oat grains (A): (1) gallic acid (0.40 \(\upmu\)g mL\({}^{-1}\)), (2) \(t\)-cinnamic acid (0.40 \(\upmu\)g mL\({}^{-1}\)), (3) caffe acid (0.30 \(\upmu\)g mL\({}^{-1}\)), (4) ferulic acid (0.59 \(\upmu\)g mL\({}^{-1}\)), (5) sinaptic acid (0.28 \(\upmu\)g mL\({}^{-1}\)), (6) \(p\)-cumaric acid (0.82 \(\upmu\)g mL\({}^{-1}\)); and in organic barley grains (B): (1) gallic acid (0.30 \(\upmu\)g mL\({}^{-1}\)), (2) \(t\)-cinnamic acid (0.10 \(\upmu\)g mL\({}^{-1}\)), (3) caffe acid (0.08 \(\upmu\)g mL\({}^{-1}\)), (4) ferulic acid (4.07 \(\upmu\)g mL\({}^{-1}\)), (5) sinaptic acid (0.27 \(\upmu\)g mL\({}^{-1}\)), (6) \(p\)-cumaric acid (0.79 \(\upmu\)g mL\({}^{-1}\)), Figure S2: Chromatograms showing retention time for flav flavotrophs identified in organic oat grains (A): (1) quercetin-3-O-rutinoside (1.29 \(\upmu\)g mL\({}^{-1}\)), (2) kaempfer-3-O-glucose (0.78 \(\upmu\)g mL\({}^{-1}\)), (3) luteolin (0.42 \(\upmu\)g mL\({}^{-1}\)), (4) quercetin (0.46 \(\upmu\)g mL\({}^{-1}\)), (5) apigenin (1.16 \(\upmu\)g mL\({}^{-1}\)), (6) kaempfer (1.18 \(\upmu\)g mL\({}^{-1}\)); and in organic barley grains (B): (1) quercetin-3-O-rutinoside (0.62 \(\upmu\)g mL\({}^{-1}\)), (2) kaempfer-3-O-glucose (0.65 \(\upmu\)g mL\({}^{-1}\)), (3) luteolin (0.50 \(\upmu\)g mL\({}^{-1}\)), (4) quercetin (0.65 \(\upmu\)g mL\({}^{-1}\)), (5) apigenin (1.91 \(\upmu\)g mL\({}^{-1}\)), (6) kaempfer (0.24 \(\upmu\)g mL\({}^{-1}\)), Figure S3: Chromatograms showing retention time for flavotrophs identified in organic oat grains (A): (1) quercetin-3-O-rutinoside (1.29 \(\upmu\)g mL\({}^{-1}\)), (2) kaempfer-3-O-glucose (0.78 \(\upmu\)g mL\({}^{-1}\)), (3) luteolin (0.42 \(\upmu\)g mL\({}^{-1}\)), (4) quercetin (0.46 \(\upmu\)g mL\({}^{-1}\)), (5) apigenin (1.16 \(\upmu\)g mL\({}^{-1}\)), (6) kaempfer (1.18 \(\upmu\)g mL\({}^{-1}\)); and in organic barley grains (B): (1) quercetin-3-O-rutinoside (0.62 \(\upmu\)g mL\({}^{-1}\)), (2) kaempfer-3-O-glucose (0.65 \(\upmu\)g mL\({}^{-1}\)), (3) luteolin (0.50 \(\upmu\)g mL\({}^{-1}\)), (4) quercetin (0.65 \(\upmu\)g mL\({}^{-1}\)), (5) apigenin (1.91 \(\upmu\)g mL\({}^{-1}\)), (6) kaempfer (0.24 \(\upmu\)g mL\({}^{-1}\)), Figure S4: Chromatograms showing retention time for flavotrophs identified in organic oat grains (A): (1) quercetin-3-O-rutinoside (1.29 \(\upmu\)g mL\({}^{-1}\)), (2) kaempfer-3-O-glucose (0.78 \(\upmu\)g mL\({}^{-1}\)), (3) luteolin (0.42 \(\upmu\)g mL\({}^{-1}\)), (4) quercetin (0.46 \(\upmu\)g mL\({}^{-1}\)), (5) apigenin (1.16 \(\upmu\)g mL\({}^{-1}\)), (6) kaempfer (1.18 \(\upmu\)g mL\({}^{-1}\)); and in organic barley grains (B): (1) quercetin-3-O-rutinoside (0.62 \(\upmu\)g mL\({}^{-1}\)), (2) kaempfer-3-O-glucose (0.65 \(\upmu\)g mL\({}^{-1}\)), (3) luteolin (0.50 \(\upmu\)g mL\({}^{-1}\)), (4) quercetin (0.65 \(\upmu\)g mL\({}^{-1}\)), (5) apigenin (1.91 \(\upmu\)g mL\({}^{-1}\)), (6) kaempfer (0.24 \(\upmu\)g mL\({}^{-1}\)), Figure S5: Chromatograms showing retention time for flavotrophs identified in organic oat grains (A): (1) quercetin-3-O-rutinoside (1.29 \(\upmu\)g mL\({}^{-1}\)), (2) kaempfer-3-O-glucose (0.78 \(\upmu\)g mL\({}^{-1}\)), (3) luteolin (0.42 \(\upmu\)g mL\({}^{-1}\)), (4) quercetin (0.46 \(\upmu\)g mL\({}^{-1}\)), (5) apigenin (1.16 \(\upmu\)g mL\({}^{-1}\)), (6) kaempfer (1.18 \(\upmu\)g mL\({}^{-1}\)); and intime for carotenoids in organic out grains (A): (1) lutein (1.73 \(\upmu\)g mL\({}^{-1}\)), (2) \(\upbeta\)-carotene (0.03 \(\upmu\)g mL\({}^{-1}\)); and in organic barley grains (B): (1) lutein (1.33 \(\upmu\)g mL\({}^{-1}\)), (2) \(\upbeta\)-carotene (0.03 \(\upmu\)g mL\({}^{-1}\)), Figure S4: Standard curves with R2 for all identified phenolic acids in cereal grains, Figure S5: Standard curves with R2 for all identified flavonoids in cereal grains, Figure S6: Standard curves with R2 for the identified carotenoids in cereal grains, Figure S7: Total ion chromatogram of mycotoxins, Figure S8: LC-MS/MS chromatograms of mycotoxins in representative grain samples: A - HT-2 toxin (HT-2) (3.42 \(\upmu\)g kg\({}^{-1}\)); B - T-2 toxin (T-2) (3.55 \(\upmu\)g kg\({}^{-1}\)); C - fumonisin B2 (FB2) (33.74 \(\upmu\)g kg\({}^{-1}\)); D - ochratoxin A (OTA) (1.53 \(\upmu\)g kg\({}^{-1}\)); E - zearalenone (ZEA) (8.00 \(\upmu\)g kg\({}^{-1}\)); F - deoxynivalenol (DON) (58.71 \(\upmu\)g kg\({}^{-1}\)) (barley, Soldo); G - 15-acetyldeoxynivalenol (15-AcDON) (2.28 \(\upmu\)g kg\({}^{-1}\)) (oat, Arden), Table S1: Multiple reaction monitoring (MRM) transitions with retention times, ion ratio, declustering potential, collision energy and cell exit potential used to detect target mycotoxins using a single method with negative and positive polarity.