Surrogate Spiking Solution, 1.2ml, nonane

Azo Dyes Mixture 128, 1000µg/mL in Acetonitrile, 1ml

2,4-D 13C6, 100µg/ml in Acetone, 1ml

N,N’-bis(1,4-Dimethylpentyl)-1,4-phenylenediamine