金标样定值中全金量的湿法分析

Application of Combined Sample Digestion Method to Determination of Gold in Certification of Standard Reference Gold Material

摘要: 含金试样经王水溶解,溶液经活性炭吸附-碘量法测定溶液中的金;残渣经氢氟酸和王水再溶解,活性炭富集-火焰原子吸收测定残渣中的金;两项结果相加作为样品中金的总量。方法用于金的地质标样定值分析,结果与标准值吻合(E<3s)。

Abstract: A combined sample digestion method was used in determination of gold in certification of standard reference gold material. The sample was digested with aqua regia and gold in the digestive sample was determined by iodometry after preconcentration with ac