Quality Control Standard 1 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 25ug/mL, Al, Ba, Be, B, Cd, Ca, Ce, Cr, Co, Cu, Fe, Li, Mg, Mn, Ni, Se, Na, Sr, V, Zn 100ug/mL, As, Pb, Hg 200ug/mL, P, K, Tl 500ug/mL, stabilized in 5% v/v nitric acid. 125 mL bottle.