Chemical Stability and Compatibility - Tin (Sn) products in different acid matrices
I have a question with regards to a standard, I need to order a tin (Sn) standard, but am not sure which one I need. There are two different Sn standards, one is listed as CGSN1, and the other is CGSNCL1. Why would SnCl be used instead of Sn, and visa versa?
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The difference between the two products is the acid matrix used to stabilize Sn in solution. The CGSN1 product uses a combination of HNO3 and HF as the matrix, as fluoride from the HF provides a complexing ligand that stabilizes Sn. The CGSNCL1 product uses HCl as the matrix, as the chloride performs a similar function as fluoride. Both options are offered as stock products due to the fact that some customers prefer to avoid, or cannot use, HF containing solutions in their labs. |