Cart

Chemical Stability and Compatibility - Stability of multi-element standards

 
I am undertaking an ICP trace element concentration study of a large number of meteorites. I will be analyzing a large number of elements (e.g., REE, Pd, Ag, Zn, Cd, Se) with a wide range of concentrations (order 0.1-1000 ug/g).I was thinking of using one, or more likely, several multi-element standard solutions for this. The study is likely to take several years. Can you give me a sense of what range of concentrations will be stable for this length of time, and what the accuracy of the concentrations would be? For instance, if solutions are most stable if the element concentrations are 10-100 ppm, what would the accuracy of the concentrations be and would the accuracy improve with increasing concentration?
Sort By    Oldest  |  Newest
Responses
admin Total posts: 529

Comprehensive information regarding stability is available on our website, specifically in the Interactive Periodic Table: http://inorganicventures.com/periodic-table and Part 7 of the Trace Analysis Guide: http://inorganicventures.com/stability-elements-ppb-concentration-levels With regard to accuracy over an extended period of time, factors to consider include chemical stability, transpiration losses, and the ‘human factor’.  We discuss these concerns at: http://www.inorganicventures.com/shelf-life-vs-expiration-date-chemical-standard In general, chemical stability is not an issue, though element and matrix compatibility need to be accounted for. Furthermore, as concentrations decrease, an increasing number of elements can be combined into chemically stable mixtures. Considering the time frame you are concerned about (several years) systematic errors in concentration due to transpiration are likely to be the greatest concern.

Posted: 09/03/18 20:42:26

1 Item

Show per page