Certified Geochem Base Metal Reference Material Product Code GBM913-1

Certified Geochem Base Metal Reference Material Product Code GBM913-1 Certified Control Values Total Digest Element Grade Standard Deviation Num of Analyses Confidence Interval Nickel ( ppm) 5 1 54 + / - 0.4 Copper ( ppm) 3964 144 73 + / - 33.9 Zinc ( ppm) 787 47 67 + / - 11.6 Lead ( ppm) 477 35 63 + / - 9 Arsenic ( ppm) 705 46 59 + / - 12.1 Cobalt ( ppm) 9 1 58 + / - 0.3 Silver ( ppm) 10.0 0.5 61 + / - 0.13 Partial Digest Element Grade Standard Deviation Num of Analyses Confidence Interval Nickel ( ppm) 6 2 46 + / - 0.5 Copper ( ppm) 3942 199 75 + / - 46.1 Zinc ( ppm) 793 48 66 + / - 11.8 Lead ( ppm) 255 29 56 + / - 8 Arsenic ( ppm) 707 31 56 + / - 8.4 Cobalt ( ppm) 10 1 51 + / - 0.3 Silver ( ppm) 10.0 0.6 69 + / - 0.15