Proficiency Tests

With analytical validation specifications that are more stringent than the current NELAC standards and with over 20 years of experience, you can trust NSI Proficiency Tests. 

The purity of analyte source materials is certified and then sample assigned values are corrected for this certified purity. This correction increases the certainty of the assigned value.

The accuracy of each formulation and the homogeneity of each batch is documented by instrumental analyses of each analyte in each of nine samples taken from the production run. No sample is ever released into a PT study unless the results of this analytical process meet acceptance limits, which are over 30% more stringent than the current NELAC standards.

PT studies are closed by documenting the stability of every analyte in every sample. This is your assurance that the sample was still right when your lab analyzed it.

For inquiries and assistance, you can reach us at 1 800-878-7654 (Toll Free), 707-525-5788 (Local) or email Sales@CPIInternational.com.