Cobalt Atomic Absorption Standard Acetylenic Hydrocarbons water) TO PASS TEST TO

water) TO PASS TEST TO PASS TEST RESIDUE AFTER EVAPORATION 10 ppm TITRABLE ACID 0

99 % LITHIUM 2000 ppm SODIUM (Na) 2000 ppm POTASSIUM (K) 2000 ppm CESIUM 2000 ppm MAGNESIUM (Mg) 10 ppm CALCIUM (Ca) 50 ppm BARIUM 100 ppm ALUMINUM 5 ppm IRON (Fe) 5 ppm CHROMIUM (Cr) 1 ppm

90% COLOR (APHA) 10 RESIDUE AFTER EVAPORATION 1 ppm WATER 0

5 % pH OF A 5% SOLUTION @ 25[dC APPROX

3 ppb LC-MS POSITIVE MODE AS RESERPINE 50 ppb LC-MS NEGATIVE MODE (AS NITROPHENOL) 50 ppb TRACE METALS TO PASS TEST TO PASS TEST RETEST DATE MANUFACTURE DATE

Cobalt Atomic Absorption Standard Acetylenic Hydrocarbons water) TO PASS TEST TOTest Specification Min Max COBALT (Co) 995 1005 ppm 995 1005 ppm STANDARDIZED AGAINST NIST 3113 3113 EXPIRATION DATE