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|Title:||Comparison of four microwave digestion methods for the determination of selenium in fish tissue by using hydride generation atomic absorption spectrometry|
|Source:||Lan, W.G.,Wong, M.K.,Sin, Y.M. (1994-02). Comparison of four microwave digestion methods for the determination of selenium in fish tissue by using hydride generation atomic absorption spectrometry. Talanta 41 (2) : 195-200. ScholarBank@NUS Repository.|
|Abstract:||Four microwave digestion methods of fish tissue for selenium determination by hydride generation atomic absorption spectrometry were compared, in which potassium hexacyanoferrate(III) was chosen as a masking agent for eliminating matrix interferences. The results showed that the methods employing HNO3/H2O2, HNO3/K2S2O8/H2O2 and HNO3/H3PO4/H2O2 digestion media were unreliable. However, the decomposition using the digestion media of HNO3/H2SO4/H2O2 enabled adequate digestion of fish tissue and retention of selenium in a state amenable for determination. Therefore, the digestion procedures with HNO3/H2SO4/H2O2 media are proposed for the determination of selenium in fish tissue by hydride generation atomic absorption spectrometry. The recoveries of the spiked samples investigated ranged from 90 to 102%. The result obtained from analyzing the NIES CRM No. 6 mussel was in good agreement with the reference value (reference value: 1.5 μg/g; found: 1.45 ± 0.05 μg/g). The limit of detection for selenium was 0.03 μg/g dry mass for a 100 mg sample. The contents of selenium in local fish species investigated ranged from 0.49 to 2.90 μg/g, and the relative standard deviation for the determination of selenium was less than 8%. © 1994.|
|Appears in Collections:||Staff Publications|
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