Indigotine (E 132), 1g

9-Carboxynonylpyridium-d5 bromide,neat,neat,10mg,

N-methylperfluoro-1-butanesulfonamide, 1.2ml x 50ug/ml, methanol

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)