Proficiency testing is defined as a method for evaluating laboratory performance under tested conditions in relation to a pre-prepared set of criteria by analyzing unidentified samples provided by an external source.

Plastic is the frequent general term for a wide variety of synthetic or semi-synthetic inorganic solid resources used in the manufacture of products. Plastics — Fire tests are generally high-molecular mass polymers, and may contain other materials to improve performance and reduce costs.

Almost no contemporary products have been developed that lack the tampering of at least a few plastic parts, and the amount of plastic parts in products is increasing all the time. The new, engineered plastics are strong, lightweight, unaffected by the elements and decomposition, and come in an amazing array of colors and textures. However, with the intensification of consumption of these resources, the need for atypical analytical techniques and expertise has emerged to characterize them.

Material specifications differ from test methods because test methods hardly indicate how a property is to be tested but do not include acceptable ranges for test results. ASTM, SAE, and the Army publicize the principles of plastic certification.

According to the chronology, the special procedure for proficiency testing in the Barrier property test of plastic packaging materials as well as research into proficiency testing, sample preparation, homogeneity and stability tests of samples, sample distribution, receipt of test data from participating laboratories, results statistics, supplement the test and publication of the conclusive conclusion. The product of each part can be separated into less important parts.

To test the validity of their ICP-MS method, the laboratories participated in a proficiency test: “Cadmium and Lead in Plastics” that was administered by the Institute for Interdisciplinary Studies (IIS) in the Netherlands. At present, this is the only international proficiency test based on ISO/IEC Guide 43. Accordingly, this test has attracted the participation of 56 analytical institutions from 20 countries around the world, with a large number of participants from Japan, Hong Kong, China and other regions in Asia.

The modules are indirectly related to the principles of testing and deserve some attention, as they are the source of some confusion. The primary confusion comes from the difference in the Izod and Charpy effect units between ASTM and ISO values. ASTM defines energy units per unit length (J/m), while ISO defines units of energy per unit area (kJ/m).