Analytical Analytical Spectroscopy Standards(AA) Spectroscopy Standards(AA) 545 IRON IRON 1,000 ppm STANDARD SOLUTION NR 1-0-1 1.000 AA, colorimetric or volumetric standard 70180 20.90 100 ML 70182 54.10 500 ML Concentration 1,000 +/- 10 ug/ml Matrix: <1% Hydrochloric acid NIST Traceable