IS 6890 : Part 1 : 1989 Method for chemical analysis of dental gold alloys Part 1 Determination of gold, silver, palladium and platinum

1 Scope

1.1 This standard (Part 1) prescribes methods for chemicalanalysis of dental gold alloys having chemical composition withinthe following range:

Constituents   Percent

Gold          Above 28

Silver          3to 30

Copper          2,, 25

Palladium       0 ,, 40

Platinum        0 ,, 50Zinc           0 ,, 2

Nickel          0,, 2

2 References

IS 264 : 1976Specification for nitric acid

IS 265 : 1987Specification for hydrochloric acid