title: Analysis of sweeps: the cuprous sulphide collecting system.
abstract: A new method for collection of precious metals in analysis of "sweeps" is presented. It is based on use of copper sulphide as collecting agent. The oxidation state of the copper has been carefully investigated and the chemistry of the system is discussed. The method gives good accuracy and reproducibility and can be combined with a wide variety of methods of determination.
authors.affiliation: Ledoux & Co., 359 Alfred Avenue, Teaneck, NJ 07666, USA.
authors.forename: S
authors.initials: S
authors.lastname: Kallmann