Gold And Silver Standards

PREFACE The search for highly sensitive in situ antigen and nucleotide detecting techniques recently achieved a new milestone with the microscopic detection of single molecules. In 1981 and 1983, two genius scientists, Gorm Danscher (Denmark) and Clive Holgate (U.K.),...

This International Standard specifies a fire assay gravimetric and flame atomic absorption spectrometric method for the determination of the mass fraction of gold and silver in copper, lead, and zinc sulfide concentrates as follows. - Copper concentrates The...

PURPOSE. This Instruction establishes policies, procedures, and standards for the administration of the Ancient Trident Award (Gold and Silver).

These test methods are intended for the determination of the gold content of gold and silver bullion. It is assumed that all who use these test methods are trained assayers capable of performing common fire assay procedures skillfully and safely. It is expected...

1.1 These test methods cover cupellation analysis of bullion having chemical compositions within the following limits:  Element  Concentration Range, % Gold 0.5 to 4.0 and 20.0 to 99.8 Silver 1.0 to 99.5 Total gold plus silver 75.0 to 100.0 1.2 These test methods...

The contents of the letters published here, again show the great range of subjects that occupied Van Leeuwenhoek: from sugar candy, the shape and crystal structure of diamonds, the dissolution of silver crystals in aqua fortis to gold dust from Guinea dissolved in aqua regia...

Continuous casting of non-ferrous metals has been practised for well over 100 years. It has many advantages over static ingot and book mould casting, the most important being improved yield, reduced energy consumption and reduction of manpower, with a consequent reduction in cost....

This International Standard gives requirements and recommendations for generating metal nanoparticles as aerosols suitable for inhalation toxicity testing by the evaporation/condensation method. Its application is limited to metals such as gold and silver which have been...

ISO 10801:2010 gives requirements and recommendations for generating metal nanoparticles as aerosols suitable for inhalation toxicity testing by the evaporation/condensation method. Its application is limited to metals such as gold and silver which have been proven to...