ASTM E53 Determination of Copper in Unalloyed Copper by Gravimetry

The chemical analysis of copper with a purity of 99.75 percent to 99.95 percent is covered in ASTM E53. It also includes electrolytic copper determination in chemical, electrolytic, and fire refined copper. Silver is deposited with copper in this process, and the result is reported as copper.

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Scope:

ASTM E53 test for the chemical analysis of copper is primarily used for compliance with compositional specifications.

Procedure

In ASTM E53, the copper is electrolytically deposited and weighed on a tarred platinum cathode after the sample is dissolved in an acid combination. Atomic absorption spectroscopy is used to determine how much copper is left in the electrolyte.

Video 01: Overview of inductive gravimetry

Specimen size:

300 mL of H₂SO₄ to 750 mL of H₂O and 210 mL of HNO₃ are used in the test method.

Result

In ASTM E53, the weight of deposited copper is calculated as follows:

Copper =A-B

Where:

A = weight of cathode plus deposited copper and

B = weight of the cathode

Conclusion:

ASTM E53 test for the chemical analysis of copper is primarily used for compliance with compositional specifications.

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