What is a Jones reductor and what is it used for?

A device that is used to chemically decrease liquids, such as ferric salt solutions, by pouring the solution into a vertical tube containing granular zinc.

• Jones reductor is a column that contains zinc coated with zinc amalgam (solution with mercury).

• Analyte is pre-reduced by passing through the Jones reductor with sulfuric acid as a solvent Analytes that can be reduced with Jones reductor are ${\mathrm{Fe}}^{3+},{\mathrm{Sn}}^{4‐}\mathrm{and}{\mathrm{MnO}}_4^{‐}$Uses:

• A Jones reductor is a reducing substance that can be used to lower the oxidation state of a metal ion in aqueous solution.

• A zinc amalgam is the active ingredient. It can be used to make solutions of ions that are promptly oxidised when exposed to air, such as Chromium(II), ${\mathrm{Cr}}^{2\mathrm{\iota }}$, and uranium(III),${\mathrm{U}}^{3+}$.