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Abstract
A proficiency test (PT) on determination of Gamma Emitters and Alphain Water was prepared within the frame of the IAEAto evaluate the analytical performance of laboratories in Saudi Arabia. This report summarizes the performance evaluation of the participating laboratories. Gross alpha and beta activities in water determined accurately by this validated Liquid scintillation counting (LSC) method and gamma radioactive activates in water determined by accurately by this validated quality control (QC) method.Analytical data evaluation was in good agreement with IAEA target values and showed an "accepted" as final score.

Introduction

The proficiency test organized by the international Atomic Energy Agency (IAEA) on the determination of Gamma Emitters and Alphain water. The proficiency testing (PT) includes a framework for the customary testing of the precision that the member research facilities can accomplish. In its standard frame, the coordinators of the plan circulate segments of a homogeneous material to each the members, who investigations the material under average conditions and report the outcome to the coordinators. The coordinators aggregate the outcomes and advise the members of the result.