4-isopropylphenyl diphenyl phosphate, 1.2ml x 50ug/ml, toluene

Total Organic Carbon (C), 1000µg/mL in 1% HCl/Water, 100ml

Ponceau 4R (E 124), 1g

ISO 18857-1 4-n-Nonylphenol (ring13C6), Internal standard 1 ng/µL, in acetone, 5mL