| Autor: |
Nakata, Fumio, Yasui, Yoshihide, Matsuo, Hiroshi, Kumamaru, Takahiro |
| Zdroj: |
Analytical Sciences; December 1985, Vol. 1 Issue: 5 p417-421, 5p |
| Abstrakt: |
The development and optimization of a miniaturized hydride generation system for atomic absorption spectrometry of selenium(IV, VI) by suction-flow on-line prereduction of selenium(VI) to selenium(IV) are described. A discrete aqueous sample is sucked into a concentrated hydrochloric acid line and brought to the prereduction coil (95°C) by a peristaltic pump. Then the mixture and sodium tetrahydroborate solution are delivered by the pump to gas-liquid separators. The evolved hydrogen selenide is swept into an electrically heated quartz cell of an atomic absorption spectrometer. A transient absorption signal is recorded on a strip chart recorder. The 3a detection limit is 0.7 ng cm-3selenium and the calibration is linear up to 30 ng cm-3with 1 cm3sample solution. The relative standard deviation (n=10) is 3.0% for 25 ng cm-3selenium. The sample throughput is 30 h-1. Results of analysis of some certified biological reference materials are given. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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