Surface Sampling and Automated Liquid Membrane Extraction of Fungicides

Research output: ThesisDoctoral Thesis (compilation)

Abstract

A number of approaches for fungicide determination are presented. A surface sampling technique is utilised for the determination of fungicide foliar residues on greenhouse surfaces, mainly leaves. The procedure is based on solvation of the fungicides on the leaf surface with ethanol and HPLC analysis. It was applied to studies of the environment in greenhouses including investigations of decline rates of the fungicides. Occupational hazards, such as respiratory exposure and dermal uptake were investigated. Another environmental aspect on application of fungicides is the discharge of the compounds and their degradation products to water recipients. The actual concentrations are often quite low (usually below 1 µg/L) necessitating sensitive and selective analytical procedures involving enrichment. This can be met by membrane-based extraction techniques also providing possibilities for automation and closed systems. The supported liquid membrane (SLM) extraction and microporous membrane liquid-liquid extraction (MMLLE), are used for sample preparation of natural water samples. Automated systems on-line to reverse- and to normal phase HPLC have been realised. A combination of these techniques offers extraction conditions, which makes it possible to determine a wide variety of compounds.

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Analytical Chemistry

Keywords

  • natural water analysis, microporous membrane liquid-liquid extraction (MMLLE), supported liquid membrane (SLM) extraction, Dislodgeable fungicide residues, surface sampling, automated sample preparation for HPLC, Analytical chemistry, Analytisk kemi
Original languageEnglish
QualificationDoctor
Awarding Institution
Supervisors/Assistant supervisor
  • [unknown], [unknown], Supervisor, External person
Award date1999 May 26
Publisher
  • Department of Analytical Chemistry, Lund University
Publication statusPublished - 1999
Publication categoryResearch

Bibliographic note

Defence details Date: 1999-05-26 Time: 10:15 Place: Chemical Center, Lecture Hall C, Lund University External reviewer(s) Name: Sundin, Peter Title: [unknown] Affiliation: Associate Professor, Swedish University of Agricultural Science, Uppsala --- Article: I. Long-Term Studies of Fungicide Concentrations in Greenhouses. 1. Technique for Determining Surficial Foliar Residues of Fungicides with Vinclozolin and Triadimefon as Model Compounds.M. Papantoni, L. Mathiasson, U. NilssonJ. Agric. Food Chem., 43 (1995) 157 Article: II. Long-Term Studies of Fungicide Concentrations in Greenhouses. 2. Fungicide Concentrations in Air and on Leaves after Different Exposure Times and under Different Climate Conditions.U. Nilsson, T. Nybrant, M. Papantoni, L. MathiassonJ. Agric. Food Chem., 44 (1996) 2878 Article: III. Long-Term Studies of Fungicide Concentrations in Greenfouses. 3. Exposure Risks after Spraying in Greenhouses.U. Nilsson, M. PapantoniJ. Agric. Food Chem., 44 (1996) 2885 Article: IV. Determination of Weakly Polar Unstable Fungicides and Metabolites at Trace Level in Natural Water using the Supported Liquid Membrane (SLM) Extraction and the Microporous Membrane Liquid-Liquid Extraction (MMLLE) Techniques connected On-line to HPLC.M. Sandahl, L. Mathiasson, J. Å. JönssonSubmitted Article: V. An Automated System for Sample Preparation of Polar and Non-polar Compounds using a Combination of Supported Liquid Membrane Extraction (SLM) and Microporous Membrane Liquid-Liquid Extraction (MMLLE) both On-line connected to HPLC.M. Sandahl, L. Mathiasson, J. Å. JönssonSubmitted Article: VI. Automated Determination of Vinclozolin at the ppb Level in Aqueous Samples by a Combination of Microporous Membrane Liquid-Liquid Extraction (MMLLE) and Normal Phase HPLC.M. Sandahl, E. Ulfsson L. Mathiasson,Submitted Article: AppendixAI. Trace Enrichment of Metals Using a Supported Liquid Membrane Technique.M. Papantoni, N.-K. Djane, K. Ndung’u, J. Å. Jönsson, L. MathiassonAnalyst 120 (1995) 1471 The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004)