Intercomparison on measurements of PCBs in pork fat during the Belgian PCB-crisis

Bester, Kai; Beernaert, Hedwig; Berndt, Alexander; Stefan, Harbeck; Konieczka, Piotr; Linsinger, Thomas P. J.; Mertens, I; Schimmel, Heinz; Sejerøe-Olsen, Berit; Pauwels, J.; Poorter, Geert De

doi:10.1007/s00216-002-1417-5

Cited by 6 publications

(1 citation statement)

References 3 publications

(7 reference statements)

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“…The method was validated a good performance (deviation from mean value obtained from all participating laboratories was between 10 and 20%) during the participation of the Toxicological Center in interlaboratory studies for PBDEs 10 and PCBs. 11 In mussels and fish muscle, method limits of quantification (LOQ) for individual BDE congeners ranged between 0.01 and 0.02 ng g À1 wet weight (ww). For individual PCB congeners, the LOQ ranged between 0.03 and 0.16 ng g À1 ww, while for HCB and p,p 0 -DDE, the LOQ were 0.23 and 0.63 ng g À1 ww, respectively.…”

Section: Quality Assurancementioning

confidence: 99%

Polybrominated diphenyl ethers (PBDEs) in freshwater mussels and fish from Flanders, Belgium

Covaci

Bervoets

Hoff

et al. 2005

J. Environ. Monitor.

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The levels and distribution of PBDEs in zebra mussels and several freshwater fish species (eel, carp and gibel carp) were investigated for different sites in Flanders, Belgium. In parallel, other organohalogenated contaminants, such as polychlorinated biphenyls (PCBs), p,p[prime or minute]-DDE and hexachlorobenzene (HCB) were also measured and their relationship with PBDEs was investigated. At most sites, individual PBDE congeners were present at detectable levels in mussel tissue, with the mean [summation operator]PBDE concentration ranging from 0.15 to 1.8 ng g(-1) wet weight (ww). The PCB concentrations in mussels ranged from 6.2 to 102 ng g(-1) ww. HCB and p,p[prime or minute]-DDE could be measured in mussels from most sites, mean values ranging from below the limit of quantification (LOQ) to 0.58 ng g(-1) ww and from 0.66 to 6.5 ng g(-1) ww, respectively. Except for one site (Blokkersdijk, Antwerp) where PBDEs were below the LOQ in carp muscle, all fish samples from other sites contained detectable PBDE levels, with the highest concentrations (14 +/- 14 ng g(-1) ww) being measured in eel liver from Watersportbaan (Ghent). The sampled sites covered a broad concentration range of organohalogenated pollutants with the highest values being consistently measured in eel liver. With few exceptions, all correlations between PBDEs and organochlorine pollutants for each species were low (r < 0.50) and most were statistically not significant (p > 0.05). This suggests that the exposure to contaminants arises from local sources possessing different signatures of PBDEs and organochlorine pollutants.

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Section: Quality Assurancementioning

confidence: 99%

Polybrominated diphenyl ethers (PBDEs) in freshwater mussels and fish from Flanders, Belgium

Covaci

Bervoets

Hoff

et al. 2005

J. Environ. Monitor.

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Application of Multivariate Statistical Methods to Water Quality Assessment of the Watercourses in Northwestern New Territories, Hong Kong

Zhou

Liu

Guo

2006

Environ Monit Assess

197

102

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Multivariate statistical methods, i.e., cluster analysis (CA) and discriminant analysis (DA), were used to assess temporal and spatial variations in the water quality of the watercourses in the Northwestern New Territories, Hong Kong, over a period of five years (2000-2004) using 23 parameters at 23 different sites (31,740 observations). Hierarchical CA grouped the 12 months into two periods (the first and second periods) and classified the 23 monitoring sites into three groups (group A, group B, and group C) based on similarities of water quality characteristics. DA provided better results with great discriminatory ability for both temporal and spatial analysis. DA also provided an important data reduction because it only used six parameters (pH, temperature, five-day biochemical oxygen demand, fecal coliforms, Fe, and Ni) for temporal analysis, affording about 84% correct assignations, and seven parameters (pH, ammonia-nitrogen, nitrate nitrogen, fecal coliforms, Fe, Ni, and Zn) for spatial analysis, affording more than 90% correct assignations. Therefore, DA allowed a reduction in the dimensionality of the large data set and indicated a few significant parameters that were responsible for most of the variations in water quality. Thus, this study demonstrated that the multivariate statistical methods are useful for interpreting complex data sets in the analysis of temporal and spatial variations in water quality and the optimization of regional water quality monitoring network.

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Levels of organochlorine pesticides, polychlorinated biphenyls and polybrominated diphenyl ethers in fish species from Kahramanmaras, Turkey

Erdoğrul

Covaci

Schepens

2005

Environment International

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Intercomparison on measurements of PCBs in pork fat during the Belgian PCB-crisis

Cited by 6 publications

References 3 publications

Polybrominated diphenyl ethers (PBDEs) in freshwater mussels and fish from Flanders, Belgium

Polybrominated diphenyl ethers (PBDEs) in freshwater mussels and fish from Flanders, Belgium

Application of Multivariate Statistical Methods to Water Quality Assessment of the Watercourses in Northwestern New Territories, Hong Kong

Levels of organochlorine pesticides, polychlorinated biphenyls and polybrominated diphenyl ethers in fish species from Kahramanmaras, Turkey

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