o-Anisidine, 100 µg/ml, Acetonitrile, 1ml

Hexanal, 1000µg/ml in MeOH, 1ml

Precision and Recovery Solution, 1.2ml, nonane

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