Testing Sample Stability in Short-Term Isochronous Stability Studies for EU-Wide Monitoring Surveys of Polar Organic Contaminants in Water

The paper gives an introduction to the EU-wide monitoring concept as run by the European Commission¿s Joint Research Centre and addresses specifically the issue of stability tests for environmental specimen and samples using the so-called isochronous stability test design. The underlying statistical concept is briefly described and applied to water samples as being collected in the context of the JRC¿s EU-wide environmental monitoring activities. The stability of spiked tap water and river water samples and their containers was assessed at 4°C, 20°C and 40°C using ibuprofen, gemfibrozil, ketoprofen, diclofenac, bezafibrate, naproxen, PFHpA (perfluoroheptanoate), PFOA (perfluorooctanoate), PFOS (perfluorooctansulfonate), carbamzepine, sulfamethoxazole, terbutylazine and triclosan as test substances in two different stability testing schemes. It could be shown that stability of the samples decreased as expected with an increase of the storage temperature. Uncertainty contributions were calculated and it was concluded that this type of samples remain stable for ca. 6 weeks if stored at 4°C.

GAWLIK Bernd;  LOOS Robert;  BIDOGLIO Giovanni;  FAULER Gisela;  GUO Xinghua;  LANKMAYR Ernst;  LINSINGER Thomas; 

2012-11-08

ELSEVIER SCI LTD

JRC54070

0165-9936,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC54070,   

10.1016/j.trac.2012.04.001,