Certified Reference material

[jiangds06]

just wonder which vendor provides best inventory of CRM in both LC and GC.

[Don_Hilton]

It depends on what kinds of materials you are looking for. NIST comes to mind as having a wide variety of materials - but there are other sources of materials for specialized areas. So, part of the question is what kinds of materials are you looking for and what kinds of analytes?

[jiangds06]

I try use these reference materials to establish our lab's systematic bias.
the compounds could be very generic.

It depends on what kinds of materials you are looking for. NIST comes to mind as having a wide variety of materials - but there are other sources of materials for specialized areas. So, part of the question is what kinds of materials are you looking for and what kinds of analytes?

[Peter Apps]

I try use these reference materials to establish our lab's systematic bias.
the compounds could be very generic.

It depends on what kinds of materials you are looking for. NIST comes to mind as having a wide variety of materials - but there are other sources of materials for specialized areas. So, part of the question is what kinds of materials are you looking for and what kinds of analytes?

The matrix of the CRM needs to be similar to the matrix of your usual samples so that you can apply your usual methods. If you usually work with foods there is not much point using a soil CRM for example. Similarly you will not learn much about your lab's performance with pesticides if you run a heavy metals CRM (to take an extreme example).

Peter