Chromium (Cr), 1µg/ml in 2%-HNO3 / Water, 100ml

S @ 1000 µg/g (0.100 wt%) in #2 Diesel Fuel, 100ml

Chlorine, 10000µg/g (1.00wt%) in Mineral Oil,100ml

Total Cyanide (CN-), 100µg/ml in in H2O/NaOH,100ml