Determination of iron in real samples by high performance capillary electrophoresis in combination with thermal lensing |
| |
Authors: | B S Seidel W Faubel |
| |
Institution: | Forschungszentrum Karlsruhe, Institut für Instrumentelle Analytik, Postfach 3640, D-76021 Karlsruhe, Germany e-mail:bernd.seidel@ifia.fzk.de, DE
|
| |
Abstract: | Natural iron concentrations in real water samples have been determined by thermal lensing as a high performance capillary electrophoresis detector. 1,10-Phenanthroline was used as a chromogenic reagent, which forms a stable complex with Fe(II) but not with Fe (III). The interferences by other cations can be neglected by a combination of this photometric technique with high performance capillary electrophoresis. Laser induced thermal lens spectroscopy is demonstrated as a new technique for the measurement of small absorbances in the picoliter detection volume of a capillary. A limit of detection of 36 nmol/L with a signal to noise ratio of 7?:?1 was achieved using a 75 μm fused silica capillary. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|