As, for AAS, in HNO3

Single element, atomic absorption standard, NIST traceable, 1000 ppm. Expiry dates - up to 21 months unopened and 15 months opened.

Matrix: 4% HNO₃

140-001-331 - As standard, 1000 ppm, 125 ml

140-001-335 - As standard, 1000 ppm, 500 ml