X-Ray Fluorescence Analysis
X-Ray Fluorescence also known as XRF analysis is one of the simplest, and most economical forms of performing an assay. It will give a very accurate non destructive analysis of the quantities and types of metals present in the sample that is being analyzed. So if you are either a precious metal buyer or seller, Amex Assayers Inc. can provide you with an accurate assessment of the metal content of your sample. We are very proud to use state-of-the-art equipment that uses Liquid Nitrogen as a coolant to give out the most accurate results in our type of business. Cadmium, Mercury and lead Testing in many imported products available in the market such as toys, plastics, metals, etc. are also determined by many government agencies through the use of X-Ray Fluorescence analysis. So avoid the fines and legal problems that can arise by selling products contaminated with these dangerous metals and have them tested regularly.
A Fire Assay is not only considered a science, but also an art, it is the oldest method in use since ancient times to our modern era, to determine the purity of a precious metal, it involves the processes of separation of impurities from the precious metal through intense heat, dry reagents or fluxes. Although it takes a few days for the process to be completed and is not as economical, and fast as an XRF assay. Nonetheless it is still considered to be the most accurate of all the assays and it is widely used by the mining and precious metal refining industries.
A Gravimetric Assay consists in the measurement of mass, and it generally consists of two method types; volatilization and precipitation. the volatilization process consists of just simply heating the sample to dryness and weighing to determine the amount of volatile components. The precipitation method consists in the sample being dissolved, and adding an excess of a precipitating agent. Then the precipitate that formed is filtered, dried and weighed, this is in turn is what is called a gravimetric analysis. By determining the amount of a substance followed by isolation from impurities within the sample.