Analytical Services
FAQs
What size sample is required for analyzing precious metals?
For metallic samples, it is recommended we have 3.00 grams of material for each item. This allows the material to be tested properly and accounts for any retesting that may be required. For fines samples, it is recommended we have 20.00 grams of material for each item.
What is the turnaround time for the results?
The Fire Assay method is normally completed within 24 hours. The ICP method is normally 24-48 hours depending on the type of sample, amount of prep that is required and number of elements being tested.
What is the difference between the Fire Assay and the ICP test methods?
The Fire Assay process is a metallurgical method to analyze with great accuracy both gold and silver jewelry samples. The ICP method involves spectrometry and has the ability to determine the content of multiple elements present in parts per million to high percentages of content.
How does the ICP method differ from AA (atomic absorption) technique?The ICP method allows the material to be scanned for multiple elements at the same time, whereas, the AA technique is designed to determine only one element at a time.
What type of sample and/or particle size is preferred for an accurate analysis?
Homogeneity is the key to accurate results with all sample types. Metal samples are best when in pin form as opposed to drillings. Fines samples prepared to 70 mesh or better are preferred. The smaller the particle, the better. One of the services we offer is preparing the fine samples to the ideal mesh size prior to analyzing. Sampling is critical to the accuracy of results.