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:: Volume 2, Issue 4 (Summer 2011) ::
JPG 2011, 2(4): 11-18 Back to browse issues page
Determining Total Mercury in Samples from the Persian Gulf and theCaspian Sea: Comparison of Dry Ash and Wet Extraction Mothods
Homira Agah , S. Mohamad Reza Fatemi , Ali Mehdinia , Ahmad Savari
Abstract:   (10538 Views)
Monitoring of mercury in environmental samples, with its proven toxicity on the food chain, requires sensitive and accurate analytical techniques. In this study, two methods for identification and quantification of total mercury in biological and sediment samples are compared: i) dry ash preparation and subsequent established procedures for Combustion Atomic Absorption Spectrometry, (AMA 254) and ii) wet extraction consisted of classical and microwave oven digestion methods combined with cold vapor Atomic Absorption (CV AAS) analyzing method. In order to compare the accuracy of the methods for total mercury determination, biological and sediment certified Reference Materials and environmental samples were analyzed. The precision and accuracy of the applied analytical methods were compared on eight Certified Reference Materials, Dorm2, Dolt 2 and Tort 2, trace metals in dog fish muscle, liver and Lobster (provided by the national research council of Canada) NIST 1556a, NISTt-2976, IAEA 142 trace metals and mercury in oyster, mussels and fish, respectively IAEA 086 and IAEA405 trace elements in hair and in polluted estuary sediment (provided by international Atomic Energy), respectively. Ten environmental (fish and sediment) samples and one inter-comparison sample (BCR 710, Total and methylmercury in oyster tissue) as well as certified samples were analyzed in six replications. The detection limits (DLs) in the combustion AAS (AMA), CEM (MDS 2000) microwave oven CVAAS, CEM (Mars 5) microwave oven CV AAS and in normal oven CV AAS for biological and sediment were compared. The AMA 254 with lower detection and quantification limits was more sensitive analyzing method in comparing with the other methods.
Keywords: AMA 254, CEM Microwave oven, Total mercury, Dry ash, Wet exttaction
Full-Text [PDF 286 kb]   (2359 Downloads)    
Type of Study: Basic and Original Research | Subject: Physical Oceanography
Received: 2012/01/15
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Agah H, Fatemi S M R, Mehdinia A, Savari A. Determining Total Mercury in Samples from the Persian Gulf and theCaspian Sea: Comparison of Dry Ash and Wet Extraction Mothods. JPG. 2011; 2 (4) :11-18
URL: http://jpg.inio.ac.ir/article-1-22-en.html


Volume 2, Issue 4 (Summer 2011) Back to browse issues page
نشریه علمی پژوهشی خلیج فارس Journal of the Persian Gulf
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