Gold Reference Material (Oxide Matrix) – 3.843 (+/- 0.023)

Reference material for gold, composed of basalt and feldspar minerals with minor quantities of finely divided gold-containing minerals that have been screened to ensure there is no gold nugget effect. Tested to show  3.843 μg/g (ppm) with a 95% confidence interval at +/- 0.023 μg/g. The material is a fine grey powder which has been well mixed and a homogeneity test carried out. The powder is sealed in to polythene sachets at 50 grams each or supplied in a 2.5 kg sealed jar.