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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NIST 1646

Classification: Reference Material -> NIST -> 1646 -> Estuarine Sediment

Citations 1

"Mercury Determination By CV-AAS In Wastewater And Sewage Sludge From A Stabilization Pond System"
Fresenius J. Anal. Chem. 1996 Volume 355, Issue 3-4 Pages 319-320
Katiuska Araujo, Marinela Colina, Román Mazurek, José Delgado, Hilda Ledo, Elizabeth Gutierrez and Lenín Herrera

Abstract: The mercury concentrations in wastewater and sewage sludge of a stabilization pond system have been evaluated. The system is built by three parallel facultative ponds followed by two systems of three maturation ponds in series. The samples of wastewater and sludge were digested using nitric acid and placed into a Parr-type bomb for 4 h at 110°C. Mercury was measured by Cold Vapour Atomic Absorption Spectrometry (CV-AAS) at 253.7 nm with sodium tetrahydroborate as reductant. The methodologies were checked with an USEPA quality control sample, a standard reference material from NIST and with another method of mineralization (cold mineralization) showing good results. Concentrations of mercury in wastewater between 1.47 ± 0.75 µg L-1 have been found at the entrance of the system and 0.74 ± 0.0 µg L-1 at the exit, while in sludge the results were between 0.29 ± 0.12 µg kg-1 in the facultative pond and 0.04 ± 0.02 µg kg-1 in the second maturation pond (exit).
Mercury Spectrophotometry Method comparison Reference material