As @ 1000 µg/mL in 5% HNO3, 100ml

CONOSTAN S-21 + AS+Co+Sb+Se, 300ppm in 75cSt oil, 200g

Fe, 1000 µg/mL in 5% HNO3, 100ml

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