Cooperative Study of Precision and Accuracy on the Determinations of Around-ppb Levels of Copper and Lead in Environmental Waters
Resource
Journal of the Chinese Chemical Society 43 (3): 237-245
Journal
Journal of the Chinese Chemical Society
Journal Volume
43
Journal Issue
3
Pages
237-245
Date Issued
1996
Author(s)
Cheng, H.-S. et al.
Abstract
Abstract The results of a series of inter‐laboratory cross‐check on the determinations of ppb and sub‐ppb levels of copper and lead in environmental samples are described. Thirteen laboratories participated during a five‐stage comparison. Seven analytical methods and two pre‐concentration procedures were performed on certified and real samples. For controlled and blind standards at higher concentration levels (10 ppb or above) the data reported by different participants show good agreement for both elements regardless of the method chosen. However, for samples having lower concentrations (1‐10 ppb level), the relative standard deviation (R.S.D.) and bias increased. A high degree of scattering on data were demonstrated for a deep ocean water at less than 1 ppb level. The results of the present study give direct comparison between different analytical methods, and also reflect the average aptitude of analytical laboratories in Taiwan on the measurements of copper and lead in environmental samples.
SDGs
Type
journal article