抄録
A new good method of copper analysis in copper cyanide bath has been developed as follows:
1. Pipette a 1ml sample into 300cc beaker and add 60-70ml of distilled water.
2. Add 1-2ml of conc. hydrochloric acid and boil until the precipitate becomes a pretty white cristal.
3. Cool and add 5ml of ammonia water and 10ml of 5% EDTA Solution.
4. Boil until the white cristal is dissolved, and cool.
5. Add 5ml of ammonia water and transfer the solution to a 100ml volumetric flask.
6. Bring the Solution to the 100ml mark with distilled water and compare the absorption factor of the solution for the wave of 740mμ wave-length with that of distilled water.
