Refining Service

Refining Service

Rhodium Master also offer refining services to our worldwide customers. Rhodium Master is a full service refiner of all precious metals. We buy, refine, purify and assay all forms of rhodium, platinum, ruthenium, palladium and PGMs. We buy all kind of scraps and do refining for our clients. Rhodium Master is only one stop service provider in Asia on refining, purifying, assaying, that serves professional jewelers, industries that generate platinum group metals (PGMs) scrap. Rhodium Master arranges on trunky based refining setup at any corner of the world based on the quantity of scrap, precious metal in metal or ores concentrate to be handled. The separation & purification of Rhodium (Rh) from the other precious metal, ores & industrial waste is one of the most difficult and pressing areas in the precious metal refining at the present time.

Silica Gel Column Chromatography

All chromatographic methods -with the exception of TLC- use columns for the separation process. Column chromatography has found its place in many laboratories for preparative purposes as well as for reaction control in organic syntheses. The importance of column chromatography is mainly due to following factors:


  • Simple packing procedure
  • Low operating pressure
  • Low expense for instrumentation


Column chromatography is separated into two categories, depending on how the solvent flows down the column. If the solvent is allowed to flow down the column by gravity, or percolation, it is called gravity column chromatography. If the solvent is forced down the column by positive air pressure, it is called flash chromatography, a “state of the art” method currently used in organic chemistry research laboratories.

Laboratory Scale Treatment Plants

Our lab is well equipped with latest technology machinery. We incorporates miniature scale treatment plants for our refining process.

Chromatography Solvent Recycling

HPLC solvent recycling is a unique application since HPLC solvents are usually mixed with large amounts of water (sometimes as much as 90% water). The addition of large amounts of water greatly increases the volume of waste solvent. As a result, costs for disposal of the used solvent can be much higher than the actual purchase cost of the original solvent. So the savings from recycling HPLC solvents can be quite significant.

The Adsorbent


Silica gel (SiO2) and alumina (Al2O3) are two adsorbents commonly used by the organic chemist for column chromatography. These adsorbents are sold in different mesh sizes, as indicated by a number on the bottle label: “silica gel 60” or “silica gel 230-400” is a couple examples. This number refers to the mesh of the sieve used to size the silica, specifically, the number of holes in the mesh or sieve through which the crude silica particle mixture is passed in the manufacturing process.


Adsorbent particle size affects how the solvent flows through the column. Smaller particles (higher mesh values) are used for flash chromatography; larger particles (lower mesh values) are used for gravity chromatography. For example, 70–230 silica gels are used for gravity columns and 230–400 mesh for flash columns.

Rhodium, Platinum, Palladium and Ruthenium assayer, scrap buyer, refiner and recycler SINCE 1996