Calibration Standard 1A for EPA 200.7 is a certified reference material traceable to NIST and manufactured in accordance with stringent quality assurance guidelines. One year expiration date. COA and MSDS are included.
Contains Ag 50ug/mL, Ba, B, Sr 100 ug/mL each, Cd, Cu, Mn 200ug/mL each, Se 500 ug/mL, As, Ca 1000 ug/mL each, stabilized in 5% v/v nitric acid. 125 mL bottle.