On-line automated sample preparation for liquid chromatography using parallel supported liquid membrane extraction and microporous membrane liquid-liquid extraction
Författare
Summary, in English
An automated system was developed for analysis of non-polar and polar ionisable compounds at trace levels in natural water. Sample work-up was performed in a flow system using two parallel membrane extraction units. This system was connected on-line to a reversed-phase HPLC system for final determination. One of the membrane units was used for supported liquid membrane (SLM) extraction, which is suitable for ionisable or permanently charged compounds. The other unit was used for microporous membrane liquid-liquid extraction (MMLLE) suitable for uncharged compounds. The fungicide thiophanate methyl and its polar metabolites carbendazim and 2-aminobenzimidazole were used as model compounds. The whole system was controlled by means of four syringe pumps. While extracting one part of the sample using the SLM technique, the extract from the MMLLE extraction was analysed and vice versa. This gave a total analysis time of 63 min for each sample resulting in a sample throughput of 22 samples per 24 h. (C) 2002 Elsevier Science B.V. All rights reserved.
Avdelning/ar
Publiceringsår
2002
Språk
Engelska
Sidor
211-217
Publikation/Tidskrift/Serie
Journal of Chromatography A
Volym
975
Issue
1
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Analytical Chemistry
Nyckelord
- Fungicides
- Microporous membranes
- Sample preparation
- Supported liquid membranes
- carbendazim
- fungicide
- imidazole derivative
- ion
- analytic method
- article
- automation
- experimental model
- liquid liquid extraction
- microporous liquid liquid extraction
- online system
- priority journal
- reversed phase high performance liquid chromatography
- sample
- supported liquid membrane extraction
- syringe
- time
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0021-9673