Summary
The aim of the present work was to develop an older method used in our laboratory based on selective solvent extraction of As and Sb as their iodides with toluene, and by the use of the radioisotopic tracers 77As and 125Sb, to improve the accuracy by better control of the radiochemical yields. 77As was produced for each sample run by concurrent irradiation of a few mg of GeO2 followed by a rapid separation of 77As from 77Ge. The radiochemically purified sample fraction containing 76+77As and 122+125Sb was counted on a Ge detector in good geometry. The γ-lines of the four nuclides do not mutually interfere so that a combined measurement of As and Sb may be made.
The method was applied to IAEA Milk Powder A-11, Animal Muscle H-4, Bowen's Kale and some other SRMs. The results obtained are discussed in the light of literature measurements. From present and previous results, together with data by Heydorn, the presently accepted value for As in Bowen's Kale of 140 ng · g−1 may be 20% too high.
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Byrne AR (1972) Anal Chim Acta 59:91–99
Byrne AR (1974) Croatica Chim Acta 46:225–235
Byrne AR (1985) Vestnik Slov Kem Društ 32:311–317
Byrne AR, Camara-Rica C, Cornelis R, De Goeij JJM, Iyengar GV, Kirkbright G, Knapp G, Parr RM, Stoeppler M (1986) Fresenius Z Anal Chem 326:723–729
Commission on Analytical Radiochemistry and Nuclear Materials, IUPAC (1979) Pure Appl Chem 51:1183–1193
Heydorn K (1980) Aspects of precision and accuracy in neutron activation analysis, Risø-R-419, p 188
Parr RM (1983) IAEA-RL-103, International Atomic Energy Agency, Vienna; updated in RL-128, Dec 1985
Schelhorn H, Geisler M (1984) J Radioanal Nucl Chem 83:5–12
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Byrne, A.R. Low-level simultaneous determination of As and Sb in standard reference materials using radiochemical neutron activation analysis with isotopic 77As and 125Sb tracers. Z. Anal. Chem. 326, 733–735 (1987). https://doi.org/10.1007/BF00473542
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DOI: https://doi.org/10.1007/BF00473542