IS 1940 : 1969 Methods of chemical analysis of tin ingot

1 Scope

1.1 This standard prescribes the methods for determination ofantimony, arsenic, copper, iron and bismuth in the ranges specifiedin IS 26-1966 and IS 4280-1967. The method for determination oflead is suitable for analysis of lead in tin ingot, Tin in tiningot shall be determined by difference.

2 References

IS 2 :1960 Rules for rounding offnumerical values

IS 26 :1966 Specification for tin ingot

IS 264 : 1968Specification for nitric acid

IS 265 : 1962Specification for hydrochloric acid

IS 266 : 1961Specification for sulphuric acid

IS 1070 : 1961Specification for water, distilled quality

IS 1817 : 1961Methods of sampling non-ferrous metals for chemicalanalysis

IS 4280 : 1967Specification for refined secondary tin