Direct analysis of bottom sediments by a microcoulometric titration method for determination of total organic halide pollutants |
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Authors: | Pavlina G Ivanova Zara V Aneva |
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Institution: | (1) Research and Development Laboratory, Analytical Department, Bourgas, Bulgaria;(2) Analytical Department, University “Prof. Dr. Assen Zlatarov”, Bourgas, Bulgaria |
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Abstract: | Up to now the content of the organic halides in sediments was measured as extractable organic halides compounds by different
methods including microcoulometric titration one. We describe a procedure for microcoulometric determination of total organic
halide pollutants by using a direct combustion of the sediments into the microcoulometric system furnace. An accelerated removal
of the inorganic chlorides by reaction with potassium nitrate using ultrasonic radiation was attained. The procedure was validated
for analysis of bottom sediments from natural and anthropogenic sources. The repeatability RSD = 8.5%, the expanded relative
uncertainty U (n = 7, P = 95%, k = 2) = 6.4%, the reproducibility RSD was within the range 10.0–7.3%, the average recovery R = 97.6% and method LOD = 11 mg kg−1 Cl.
Correspondence: Zara V. Aneva, Analytical Department, University “Prof. Dr. Assen Zlatarov”, Nr. 1 Prof. Yakimov street, 8010
Bourgas, Bulgaria |
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Keywords: | : Bottom sediments total organic halide pollutants microcoulometric titration direct analysis |
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