New NBMG standard reference materials available
NBMG is announcing the sale of new standard reference materials for three Carlin-type gold ores:
NBM-8a is a low-grade oxide ore standard having a recommended gold concentration of 0.049 ounces/ton.
NBM-8b is a high-grade oxide ore standard having a recommended gold concentration of 0.290 ounces/ton.
NBM-8c is a high-grade refractory ore standard having a recommended gold concentration on 0.397 ounces/ton with very high arsenic concentration.
All three standards have a broad suite of trace-element data reported. These new SRMs are available in 300-gram bottles for $100.00 or 30-gram bags for $15.00.
NBMG standard reference materials: