Abstract |
A simple and fast method is presented to be used for example in studies on the relationship between serum levels of persistent organic pollutants and type 2 diabetes mellitus. Method is based on liquid-liquid extraction and gas chromatography coupled with high-resolution mass spectrometry. In the sample pre-treatment special attention was paid to minimize the number of sample manipulation steps and the amounts of organic solvents needed. Compounds analyzed were 2,2',4,4',5,5'-hexachlorobiphenyl (PCB-153) and 1,1-dichloro-2,2-bis (p-chlorophenyl)- ethylene ( p,p'-DDE), the major metabolite of DDT. The method included extraction and cleanup of 0.2ml of serum in a single test tube and subsequent analysis of the extract from 0.2ml final volume. Validation was conducted to explore the performance of the method. The limits of detection for p,p'-DDE and PCB-153 based on the standard deviation of the blank samples were 4.3 and 3.1pg/ml, respectively. Repeatability was less than 2.5% at three concentration levels tested and recovery from Certified Reference Material SRM 1589a was 84% for p,p'-DDE and 87% for PCB-153 of the certified values, respectively. Serum samples from the AMAP intercalibration round 2008-2 were also analyzed, and results were 101-116% of the assigned values. The presented method was used for an epidemiological study with more than 700 serum samples from a type 2 diabetes cohort from Sweden.
|
Authors | Panu Rantakokko, Hannu Kiviranta, Lars Rylander, Anna Rignell-Hydbom, Terttu Vartiainen |
Journal | Journal of chromatography. A
(J Chromatogr A)
Vol. 1216
Issue 6
Pg. 897-901
(Feb 06 2009)
ISSN: 0021-9673 [Print] Netherlands |
PMID | 19108840
(Publication Type: Journal Article)
|
Chemical References |
- Environmental Pollutants
- Dichlorodiphenyl Dichloroethylene
- Polychlorinated Biphenyls
- 2,4,5,2',4',5'-hexachlorobiphenyl
|
Topics |
- Analysis of Variance
- Chemical Fractionation
(methods)
- Diabetes Mellitus, Type 2
(blood, epidemiology)
- Dichlorodiphenyl Dichloroethylene
(analogs & derivatives, analysis, blood)
- Environmental Pollutants
(blood)
- Gas Chromatography-Mass Spectrometry
- Humans
- Polychlorinated Biphenyls
(analysis, blood)
- Reproducibility of Results
- Sensitivity and Specificity
|