Flow injection-capillary electrophoresis system with contactless conductivity detection and hydrostatic pressure generated flow. Application to the quantitative analysis of inorganic anions in water samples
Jazyk angličtina Země Německo Médium print
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
12858366
DOI
10.1002/elps.200305433
Knihovny.cz E-zdroje
- MeSH
- anionty MeSH
- anorganické látky izolace a purifikace MeSH
- elektroforéza kapilární metody MeSH
- kalibrace MeSH
- průtoková injekční analýza metody MeSH
- reprodukovatelnost výsledků MeSH
- tlak MeSH
- voda chemie MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- anionty MeSH
- anorganické látky MeSH
- voda MeSH
A simple and inexpensive flow injection-capillary electrophoresis (FI-CE) system with contactless conductivity detection (CCD) for automated quantitative analysis of chloride, nitrate, and sulfate in various water samples is demonstrated. A glass bottle containing the background electrolyte that is raised above the FI-CE interface generates a pulse-free, highly reproducible flow of the electrolyte through the FI-CE interface. The system operates at a flow rate of 300 microLmin(-1) with an injection volume of only 4 microL. The repeatability of peak areas (n = 18) was better than 0.81% RSD and the sample throughput was 90 samples per hour using the background electrolyte containing 12 mM L-histidine adjusted to pH 4.00 with acetic acid. The limits of detection were better than 125 microgL(-1) and were comparable to those obtained by conventional CE systems with CCD. Various calibration methods for FI-CE system with electrokinetic injection were tested and their suitability for the analysis of anions in real samples was evaluated.
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