ESTIMATING THE UNCERTAINTY
RELATED TO GC-MS ANALYSIS OF
ORGANO-CHLORINATED PESTICIDES
FROM WATER
MIHAELA PANĂ1, ALEXANDRU PANĂ2, GABRIELA RĂU3,
GEORGE DAN MOGOŞANU4*
1Quality of Water Laboratory, National Agency of Romanian Waters,
6 Remus Bellu Street, 240204 Râmnicu Vâlcea, Romania
2Quality Control Laboratory, S.C. Oltchim S.A., 1 Uzinei Street, 240050
Râmnicu Vâlcea, Romania
3Department of Organic Chemistry & Medicinal Chemistry
4Department of Pharmacognosy & Phytotherapy
University of Medicine and Pharmacy of Craiova, Faculty of Pharmacy,
2–4 Petru Rareş Street, 200349 Craiova, Romania
*corresponding author: mogosanu2006@yahoo.com
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Abstract:

The objective of this study was to assess the importance of estimating the uncertainty related to the results of analysis of water samples containing organo-chlorinated pesticides such as: aldrin (C12H8Cl6), endrin (C12H8Cl6O), p,p’-dichlorodiphenyltrichlorethane (C14H9Cl5), and
γ-hexachlorocyclohexane (C6H6Cl6). The measurements were made using the gas chromatography – mass spectropetry (GC-MS) technique. In order to simplify the calculations and to stress the contribution of the incertitude of each phase in the analytical procedure to the overall uncertainty, the present study refers exclusively to waters that do not contain dissolved
fraction, while the contribution of the staff and the environmental factors to the uncertainty are not taken into consideration. Nevertheless, the steps for water sampling, for the solvent extraction and rotary evaporator concentration, for preparing the standard solutions and plotting the calibration graph, were taken into consideration.

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