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HomeAgriculture & FoodFertilizersAnalytical ServicesProficiency Testing Programs (LQSi)Reference Material Services
LQSi reference materials are used by:
There are different categories of reference materials (RM):
Type A RM are based upon the consensus mean of the laboratories participating in a PTP, less all Grubbs and Cochran outliers. A more robust Type A RM uses the 10 % trimmed mean.
Type B RM are based upon the consensus mean of select reference laboratories that participate in a PTP, where six or more reference laboratories are used.
Type C RM are based upon the consensus mean of select reference laboratories that use a specific certified RM, traceable to a National Standards Body where six or more reference laboratories are used.
LQSi has three sulfur-in-coal CRM available with the following certified values:
LQSi can obtain any NIST SRM and send it with our monthly PTP samples.
LQSi can supply primary HGI CRM from Pennsylvania State University.
LQSi can help you to demonstrate laboratory capability, examine measurement uncertainty and determine your laboratory’s place in the global performance hierarchy. Let our LQSi experts customize a quality control program for you. Contact LQSi today to obtain specific certified reference materials.