Azorubin (E 122), 1g

3-Methylphenol, 100 µg/ml, Acetonitrile, 1ml

D6-Benzyldimethyldodecylammonium iodide, 10mg

2,3,4,5-Tetrabromobenzoic acid [13C6 ring], 1.2ml x 50ug/ml, methanol