Wet Oxidation Method for the Determination of Submicrogram Quantities of Mercury in Cereal Grains

1972 ◽  
Vol 55 (5) ◽  
pp. 951-959 ◽  
Author(s):  
M Malaiyandi ◽  
J P Barrette
Keyword(s):  
Vanadium Pentoxide ◽  
Cereal Grains ◽  
Acid Mixture ◽  
Wet Oxidation ◽  
Digestion Method ◽  
Oxidation Method ◽  
Digestion Procedure ◽  
Wet Digestion ◽  
Cereal Flour

Abstract A simple and rapid wet-digestion procedure is described in which flour samples containing bound and unbound mercury are decomposed, using a sulfuric-nitric acid mixture in the presence of small amounts of vanadium pentoxide. Fortification studies with 3 organomercuric compounds on mixed cereal flour indicate average recoveries in excess of 96% in the 20–500 ppb range. This wet digestion method is compared with the Klein procedure to illustrate the advantages and significance of the vanadium pentoxide oxidation.

Simplified Version of the Ampoule–Persulfate Method for Determination of Dissolved Organic Carbon

1987 ◽  
Vol 44 (1) ◽  
pp. 214-218 ◽  
Author(s):  
William H. McDowell ◽  
Jonathan J. Cole ◽  
Charles T. Driscoll
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Automated Analysis ◽  
Combustion Products ◽  
Technical Grade ◽  
Digestion Procedure ◽  
Wet Digestion ◽  
Simplified Method ◽  
Continuous Stream

A simplified method for the determination of dissolved organic carbon is based upon the ampoule–persulfate wet digestion procedure. The modification proposed involves use of a continuous stream of sparging gas (technical grade oxygen) during the ampoule sealing process to minimize entry of combustion products from the sealing flame. The method provides reliable results with a minimum of training and equipment compared with other methods of sealing ampoules. Further, the proposed method is inexpensive, relatively simple, and compares favorably with costly, automated analysis of dissolved organic carbon.

Adaptation of a Dry Ashing Procedure for Determination of Selenium by Fluorimetry in High-Fat Foods

1995 ◽  
Vol 78 (2) ◽  
pp. 477-479 ◽  
Author(s):  
Jacques R Bellanger
Keyword(s):  
Magnesium Nitrate ◽  
High Fat ◽  
Fluorimetric Determination ◽  
Digestion Method ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Selenium Determination ◽  
Wet Ashing ◽  
Total Procedure

Abstract The wet ashing–dry ashing procedure for destruction of organic matter in high-fat foods for subsequent fluorimetric determination of selenium was investigated. Samples were decomposed by predigestion with nitric acid and dry-ashed with magnesium nitrate and hydrochloric acid. Selenium was recovered quantitatively through the total procedure. Detection limit was about 4 ppb. Accuracy was tested by analysis of several reference materials and by comparison with the wet-digestion method. The present method can be used conveniently for selenium determination in high-fat foods.

Determination of Ten Trace Element in River Deposit by ICP-OES

2013 ◽  
Vol 807-809 ◽  
pp. 196-199
Author(s):  
Ting Ting Liu ◽  
Hong Yuan Shen
Keyword(s):  
Trace Element ◽  
Standard Addition ◽  
Measured Data ◽  
Good Precision ◽  
Icp Oes ◽  
Digestion Method ◽  
Wet Digestion ◽  
Relative Standard ◽  
Precision And Accuracy

Wet digestion method had been used in river deposit of BZ profile. At the same time, Mn, Cu, Ba, Ni, Pb, Zn, Rb, V, Sr and Zr in river deposit were determined by ICP-OES. The results show that the relative standard deviations are all below 0.39%, while the recovery of standard addition is 94.3%~117.1%. The method is proved to have good precision and accuracy, and to be simple and rapid. And the measured data provide basis for paleoflood study in this area.

Selenium Determination on Fish Tissue

1975 ◽  
Vol 32 (2) ◽  
pp. 249-252 ◽  
Author(s):  
Albert R. Beal
Keyword(s):  
Sulfuric Acid ◽  
Fish Tissue ◽  
Tissue Homogenate ◽  
Acid Mixture ◽  
Digestion Procedure ◽  
Wet Digestion ◽  
Selenium Determination ◽  
Selenium Analysis

A wet-digestion procedure for selenium analysis offish is described. It involves digestion of the fish tissue homogenate in a nitric–perchloric–sulfuric acid mixture and subsequent complexing with 2,3-diaminonaphthalene. Interfering elements are masked with disodium (ethylenedinitrilo)-tetraacetate prior to complexing. The slope of standards is consistent and recoveries range from 85 to 100%.

scholarly journals A Method for Determination of Selenium in Organic Tissues Using Microwave Digestion and Liquid Chromatography

2007 ◽  
Vol 90 (3) ◽  
pp. 838-843 ◽  
Author(s):  
Espen Govasmark ◽  
Mark G Grimmett
Keyword(s):  
Certified Reference Materials ◽  
Microwave Digestion ◽  
Digestion Method ◽  
Laboratory Procedure ◽  
Liquid Chromatograph ◽  
Wet Digestion ◽  
Fluorescence Determination ◽  
Liquid Chromatographic ◽  
Selenium Analysis

Abstract An existing laboratory procedure for selenium analysis using open-vessel wet digestion and liquid chromatographic fluorescence determination was modified for use with microwave digestion. The proposed microwave digestion method eliminated the hazards associated with the use of HCIO4 while maintaining excellent recoveries of selenium. A 2-step HNO3/H2O2 digestion procedure was developed. Digested samples were derivatized with 2,3-diaminonaphthalene, and the resultant piazselenol complex was measured fluorometrically using a liquid chromatograph. Measured values were in agreement with 9 different certified reference materials. The detection limit for this method was 0.54 ng Se/g tissue (3 ), and the calibration curve remained linear (r2 = 0.9968) up to 2 g Se/g.

scholarly journals Determination of Tritium Content in Radioisotope Wastes by a Wet Oxidation Method

2009 ◽  
Vol 30 (12) ◽  
pp. 3095-3097 ◽  
Author(s):  
Heung-Nae Lee ◽  
Seung-Dae Yang ◽  
Kwang-Yong Jee ◽  
Se-Chul Sohn
Keyword(s):  
Wet Oxidation ◽  
Tritium Content ◽  
Oxidation Method
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