International Measurement Evaluation Programme IMEP-2 : Cd in polyethylene
The use of cadmium in pigments, stabilisers and plating for the manufacture of products has increased drastically within the last fifty years. Because cadmium is known to be a pollutant of high toxicity for the environment, several countries have decided to prohibit or drastically restrict the industrial use of cadmium. In the frame of IMEP-2, the assay of cadmium in polyethylene by routine methods involved 23 participants from 8 countries using 9 different methods. Certified values were obtained by CBNM using the IDMS technique. The results produced by the participants in the programme under routine conditions show a reasonable spread around the certified value established by IDMS. 85 to 88% of the values are within +/- 10% deviation from the certified value. 70 to 85% of the declared uncertainties are adequate. The quality of the results is independent of the experience of the laboratory in the determination of cadmium in polyethylene. Comparison of the methods used reveals that routine methods such as AAS and AES can, if they are well controlled, give good results.
Bibliographic Reference: Paper presented: 5th International Symposium on Biological and Environmental Reference Materials, Aachen (DE), May 11-14, 1992
Availability: Available from (1) as Paper EN 36837 ORA
Record Number: 199210695 / Last updated on: 1994-12-02
Original language: en
Available languages: en