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: Reference Material -> NRCC -> SLRS-1 -> Riverine water

Citations 2

"Flow Constant-current Stripping Analysis For Antimony(III) And Antimony(V) With Gold Fiber Working Electrodes. Application To Natural Waters"
Anal. Chim. Acta 1987 Volume 202, Issue 1 Pages 123-129
Huang Huiliang, Daniel Jagner and Lars Renman

Abstract: To determine Sb(III), a sample was made 20 µM in KI (to mask Bi(III)) and 0.1 M in HCl and the solution was passed at 1 mL min-1 through a flow cell system containing a 10 µm gold-fiber working electrode, a Ag - AgCl reference electrode and a platinum counter electrode (cf. Anal. Abstr., 1987, 49, 10J160); electrolysis was carried out for 10 min at -0.4 V. Then, either 2 M HCl or 4 M HCl - 4 M CaCl2 was passed through the cell and stripping was effected at a constant current of 0.5 µA. To determine the sum of Sb(III) and Sb(V) (and hence Sb(V) by difference), electrolysis was carried out in 20 µM-KI - 4 M HCl. The method of standard additions was used for evaluation. Results obtained for Sb(V) in river water reference sample SLRS-1 were in excellent agreement with the certified value.
Antimony(3+) Antimony(5+) Amperometry Electrode Reference material Standard additions calibration

"Determination Of Traces Of Copper, Cadmium, And Lead In Biological And Environmental Samples By Flow Injection Isotope Dilution Inductively Coupled Plasma Mass Spectrometry"
Anal. Chim. Acta 1993 Volume 284, Issue 1 Pages 181-188
Pei-Ling Lu, Kuang-Shie Huang and Shiuh-Jen Jiang*

Abstract: Flow injection isotope dilution ICP-MS was used in the determination of Cu, Cd, and Pb in SLRS-2 river water and CASS-2 seawater reference materials (National Research Council of Canada) and in freeze-dried urine (NIST SRM 2670) with use of 65Cu, 111Cd and 204Pb as reference isotopes. Isotope ratios for each injection (200 µL) were calculated from the areas of the flow injection peaks and precision was generally 1%. Detection limits were 45, 25 and 58 ng/l for Cu, Cd and Pb, respectively. Both Na and Mg interfered in the determination of Cu and their prior removal was necessary for the analysis of highly saline samples such as seawater. A Tracecon sample pre-treatment system (cf., Ibid., 1993, 282, 437) was used for the separation of Mg and Na and for the pre-concentration of traces of Cu, Cd and Pb in the natural water reference materials. Results obtained for all reference materials agreed well with certificate values.
Copper-65 Cadmium-111 Lead-204 Spectrophotometry Mass spectrometry Reference material Isotope ratio Interferences Preconcentration