University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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NRCC DOLT-2

Classification: Reference Material -> NRCC -> DOLT-2 -> Dogfish liver

Citations 1

"Determination Of Total Mercury In Biological Tissues By Flow Injection Cold Vapor Generation Atomic Absorption Spectrometry Following Tetramethylammonium Hydroxide Digestion"
Analyst 1998 Volume 123, Issue 6 Pages 1215-1218
Guanhong Tao, Scott N. Willie and Ralph E. Sturgeon

Abstract: A simple, rapid and reliable method was developed for the determination of total mercury in biological samples. Samples were solubilized by tetramethylammonium hydroxide (TMAH). The organically bound mercury was cleaved and converted to inorganic mercury by online addition of KMnO4. The decomposed mercury together with inorganic mercury originally present in samples was determined by flow injection cold vapor atomic absorption spectrometry after reduction to elemental mercury vapor using NaBH4. A sample throughput of 100 measurements per h was achieved after a 30 min dissolution with TMAH. The relative standard deviation for 20 µg L-1 Hg was 1.3% and the limit of detection was 0.1 µg L-1 (3s). The proposed method was validated by the anal. of a suite of certified marine biological reference materials, DORM-2 (dogfish muscle), DOLT-2 (dogfish liver) and TORT-2 (lobster hepatopancreas), with calibration against simple Hg(II) standards.
Mercury Sample preparation Spectrophotometry Reference material Volatile generation