scholarly journals Monitoring plan for mercury in fish tissue and water from the Boise River, Snake River, and Brownlee Reservoir, Idaho and Oregon

2013 ◽  
Author(s):  
Christopher A. Mebane ◽  
Dorene E. MacCoy
Keyword(s):  
Fish Tissue ◽  
Snake River ◽  
Monitoring Plan ◽  
Mercury In Fish ◽  
Brownlee Reservoir

Rapid Semimicro Method for the Determination of Methyl Mercury in Fish Tissue

1972 ◽  
Vol 55 (3) ◽  
pp. 583-589 ◽  
Author(s):  
J F Uthe ◽  
J Solomon ◽  
B Grift
Keyword(s):  
Gas Chromatography ◽  
Thin Layer ◽  
Methyl Mercury ◽  
Total Mercury ◽  
Aqueous Ethanol ◽  
Fish Tissue ◽  
Mercuric Iodide ◽  
Mercury In Fish ◽  
Layer Chromatography

Abstract A fast semimicro method for the determination of methyl mercury in fish tissue is described. The procedure involves extracting the methyl mercury into toluene as methyl mercuric bromide, partitioning the bromide into aqueous ethanol as a thiosulfate complex, and re-extracting into benzene as methyl mercuric iodide. Methyl mercury is quantitated with gas chromatography. The method is sensitive to 0.01 ppm. Recoveries of added methyl mercury were 99% and the presence of methyl mercury in the final extract was shown by thin layer chromatography and gas chromatography of the thin layer spot. A variety of mercurial compounds do not interfere in the analyses. The amounts of both methyl and total mercury found in a variety of tissues of aquatic animals are compared. The presence of a demethylase in seal is suggested by the findings of high levels of nonmethyl mercury. Additional cleanup by column chromatography on Florisil was necessary with certain samples. The gas chromatographic columns were kept operational by the intermittent injection of 3M potassium iodide. Due to column bleed and resulting detector contamination, the use of the easily cleaned concentric tube electron capture detector is recommended.

Analysis of Mercury in Sportfish Tissue by Thermal Decomposition, Amalgamation/Atomic Absorption Spectrophotometry

2005 ◽  
Vol 68 (4) ◽  
pp. 879-881 ◽  
Author(s):  
J. A. LASRADO ◽  
C. R. SANTERRE ◽  
S. M. SHIM ◽  
J. R. STAHL
Keyword(s):  
Thermal Decomposition ◽  
Atomic Absorption ◽  
Inductively Coupled Plasma ◽  
Total Mercury ◽  
Limit Of Detection ◽  
Fish Tissue ◽  
Atomic Absorption Spectrophotometry ◽  
Inductively Coupled ◽  
Absorption Spectrophotometry ◽  
Mercury In Fish

Sportfish samples (n = 133) that originated from Indiana waters were analyzed for total mercury using inductively coupled plasma/mass spectrometry (ICP/MS) and thermal decomposition, amalgamation/atomic absorption spectrophotometry (TDA/AAS). Total mercury concentrations obtained by the two methods were not significantly different (P > 0.05). The correlation coefficient for total mercury obtained for the two methods was 0.94. The limit of detection using TDA/AAS was 0.1 ppm. TDA/AAS is a preferred technique for the analysis of total mercury in fish tissue because it is rapid (6 min per sample) and easy to use and requires little sample preparation.

Distribution of Debris and Downstream-Migrating Salmon in the Snake River above Brownlee Reservoir

1969 ◽  
Vol 98 (2) ◽  
pp. 239-244 ◽  
Author(s):  
Gerald E. Monan ◽  
Robert J. McConnell ◽  
John R. Pugh ◽  
Jim R. Smith
Keyword(s):  
Snake River ◽  
Brownlee Reservoir

Rapid Digestion and Flameless Atomic Absorption Spectroscopy of Mercury in Fish: Collaborative Study

1977 ◽  
Vol 60 (4) ◽  
pp. 833-837 ◽  
Author(s):  
Robert K Munns ◽  
David C Holland
Keyword(s):  
Collaborative Study ◽  
Fish Tissue ◽  
Mercury Content ◽  
Acid Mixture ◽  
Tuna Fish ◽  
Flameless Atomic Absorption Spectroscopy ◽  
Digestion Technique ◽  
Fish Samples ◽  
Mercury In Fish ◽  
Aoac Method

Abstract A collaborative study of the determination of mercury in fish has been completed in which wet oxidation of fish tissue in nitric acid, using vanadium as a catalyst, is compared with the AOAC official final action digestion technique, 25.103–25.105, involving a nitric-perchloric acid mixture. The study used tuna fish samples of known mercury content and included spike recovery studies in which methyl mercury solutions of known composition were provided to each laboratory. The study was designed to provide recovery information that bracketed the regulatory level of mercury in fish. The results indicate that the proposed digestion method is at least as precise and accurate as the AOAC method. The proposed method is also more rapid and less hazardous. It has been adopted as official first action.

scholarly journals Optimization of a Digestion Method to Determine Total Mercury in Fish Tissue by Cold Vapor Atomic Fluorescence Spectrophotometry

2020 ◽  
Vol 3 (2) ◽  
pp. 45
Author(s):  
Gabriela S. Yánez-Jácome ◽  
David Romero-Estévez ◽  
Hugo Navarrete ◽  
Karina Simbaña-Farinango ◽  
Pamela Y Vélez-Terreros
Keyword(s):  
Total Mercury ◽  
Fish Tissue ◽  
Pressure Vessels ◽  
Intermediate Precision ◽  
Atomic Fluorescence ◽  
Cold Vapor ◽  
Fluorescence Spectrophotometry ◽  
Relative Standard ◽  
Mercury In Fish ◽  
And Performance

Several microwave-assisted digestion methods were tested at the Centro de Estudios Aplicados en Química laboratory in Quito, Ecuador, to determine the accuracy and performance efficiency of the mineralization process for the determination of total mercury in fish tissue by cold vapor atomic fluorescence spectrophotometry. The use of MARSEasyPrep high-pressure vessels, low amounts of reagents (1 cm3 HNO3, 1 cm3 H2O2, and 1 cm3 HClO4), an irradiation temperature of 210 °C, and 35 min of mineralization time resulted in accurate performance, with recoveries of certified reference material DORM-4 between 90.1% and 105.8%. This is better than the Association of Official Analytical Chemists 2015.01 method, which has a reported accuracy of 81%. The repeatability precision and intermediate precision were established at three concentration levels (0.167, 0.500, and 0.833 mg·kg−1) and expressed as the percentage of the relative standard deviation ranging from 1.5% to 3.0% and 1.7% to 4.2%, respectively. Further, the method was satisfactorily applied to analyze fortified samples of tilapia (Oreochromis niloticus), with recoveries ranging from 98.3% to 104.3%. The instrumental limits of detection and quantification were 0.118 µg·dm−3 and 0.394 µg·dm−3, respectively.

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