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
Website: @unf

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Classification: Marine -> organisms

Citations 2

"Study Of Interferences In The Spectrochemical Behaviour Of Strontium, Related To Its Determination In The Shell Of Marine Organisms"
Ann. Chim. 1993 Volume 83, Issue 3-4 Pages 105-115
Mazzucotelli, Ambrogio; Rivaro, Paola

Abstract: Results for the determination of Sr in standard solution by ICP-AES or flow injection ICP-AES, viz, 50 ± 2 ppb and 49 ± 1 ppb, respectively, were little affected by the addition of a 40 000-fold concentration. of Ca, viz, 49 ± 2 ppb and 50 ± 1 ppb, respectively, and were in good agreement with the actual value of 50 ppb. The corresponding result obtained by electrothermal AAS with Zeeman correction in the presence of this concentration. of Ca, viz, 40 ± 5 ppb, was raised to 49 ± 1 ppb by prior removal of the Ca with Dowex 50-X8 resin. Strontium determinations by ICP-AES and flow injection ICP-AES on the international standard reference materials NBS 1b (clay), GFS 400 (dolomite) and GFS 403 (calcareous dolomite) fell within the accepted range of values; results by electrothermal AAS fell well outside the accepted range, but were improved significantly if Ca, Na, K and Mg were removed by ion exchange. The observed effects of unremoved Ca, La and P on results by flame AAS and electrothermal AAS with deuterium or Zeeman background correction are discussed.
Strontium Spectrophotometry Interferences Reference material

"Wet-digestion Method For Determination Of Total Arsenic In Marine Organisms. 1. Study On Wet-digestion Method For Determination Of Total Arsenic In Marine Organisms By Continuous-flow Arsine Generation And Atomic Absorption Spectrometry Using Some Model Compounds"
Bunseki Kagaku 1983 Volume 32, Issue 6 Pages E171-E176
Jin, K.;Ogawa, H.;Taga, M.

Abstract: Optimum conditions were examined for the continuous-flow generation of AsH3 (for subsequent AAS determination) by wet-oxidation of methanearsonic acid, hydroxydimethylarsine oxide, arsenobetaine (II) and benzenearsonic acid as model compounds. Conditions for the generation of AsH3 from inorganic As(III) and As(V) were also studied. The organoarsenic compounds were completely decomposed to inorganic As(V) by 63% HNO3 - 60% HClO4 - concentrated H2SO4 (10:5:3); contrary to the report of Hirayama et al. (Anal. Abstr., 1982, 42, 1F32), it was unnecessary to add Ni to the digestion mixture to prevent loss of I. When digestion was performed on a hot-plate, the use of HClO4 was essential to decompose II
Arsenic, total Arsenic(3+) Arsenic(5+) methanearsonic acid hydroxydimethylarsine oxide Arsenoβine benzenearsonic acid Sample preparation Spectrophotometry