Tris(4-nitrophenyl) Phosphate, >98%, 25g

2,4-Dimethylaniline, 100 µg/ml, Methanol, 5ml

Methylphenidate

ISO 17495 Internal Standard Stock Solution 2 Internal standards, each 10µg/mL in acetone; unit: 1x5mL 2061.6 2,4-Dibromophenol [615-58-7] 2060.6 2,4,6-Tribromophenol [118-79-6] The following compounds are suggested as alternative I