Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane

Total Kjeldahl Nitrogen as N

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)

Tolfenamic acid, 100mg