Triasulfuron, analytical standard (Supelco)

Sennoside A, analytical standard

Warfarin, analytical standard

Warfarin, analytical standard (Supelco)

Mettler-Toledo® Calibration substance ME 51143091, Saccharin

1,3-Dimethyl-2-nitrobenzene, analytical standard (Supelco)

Sennoside A, analytical standard

Methacrylic acid-methyl ester 1000 µg/mL in Methanol, analytical standard (Supelco)

Demeton (O+S), analytical standard (Supelco)

2-Ethyl-2-phenylmalonamide monohydrate, analytical standard