Company Info

Proficiency Services Ltd (PSL) was formed in 1999 to provide an independent proficiency testing service for laboratories. Our sole business is the provision of Laboratory Proficiency Testing Schemes, Laboratory Reference Materials and Related Services. We deliver the LabChek range of Proficiency Testing Schemes.

The range of LabChek schemes has expanded since the company formed, and we now provide services to more than 250 laboratories in 23 countries.

Our commitment is to provide laboratories with informative and valid assessments of their analytical performance. We provide the highest standards of accuracy and confidentiality in our work.

Our core strengths are:

• Understanding laboratories' needs. With help from our Technical Advisory Groups, our experienced staff ensure that the design and operation of LabChek PT schemes is appropriate to the needs of participating laboratories.
• Partnerships with industry groups enable us to draw on current industry knowledge and to align the development of our PT schemes with industry needs.
• Our approachable and service-oriented team are dedicated to providing excellent and cost-effective service, enabling us to deliver robust and reliable PT schemes to laboratories internationally.

In each PT scheme, we invite leading specialists from related industries and participating laboratories to contribute to our Technical Advisory Groups (TAGs). These groups advise us on the design and operation of each LabChek PT scheme, to ensure that our procedures continue to be the most appropriate to the needs of participating laboratories, and wider stakeholders. This advice covers:

• selection of sample matrices
• sample preparation
• test method applications
• data analysis
• proficiency assessment