A study of microdialysis sampling of metal ions

Torto, Nelson; Mwatseteza, Jonas; Sawula, Gerald

doi:10.1016/s0003-2670(02)00048-x

Cited by 41 publications

(27 citation statements)

References 26 publications

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“…fermentations), [21,22] the assessment of the quality of foodstuffs [23][24][25] and cosmetics [26,27] and the probing of target species in environmentally relevant matrices. [16,[28][29][30][31][32][33][34][35][36][37][38] Such measurements are based on the deployment of a semi-permeable hydrophilic membrane into the target medium. The device thus acts as a diffusion-controlled passive micro-sampler.…”

Section: Introductionmentioning

confidence: 99%

In-situ sampling of soil pore water: evaluation of linear-type microdialysis probes and suction cups at varied moisture contents

Miró

Fitz²,

Swoboda³

et al. 2010

Environ. Chem.

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Environmental context. There is a need for slightly invasive techniques capable of in-situ probing of target analytes in environmental compartments. Owing to its passive sampling mode and small probe dimensions, microdialysis-based dosimetry is an appealing tool for monitoring of solute concentrations in both water bodies and pore soil waters with minimum disturbance of natural equilibrium. The development of field applications is challenging but will provide novel insights as to the speciation and bioaccessibility of environmental pollutants, e.g. trace metals, at high spatial resolution.Abstract. In-situ sampling of soil pore water is still a challenge for environmental scientists. Here, microdialysis is explored for probing metal concentrations in soil pore water at soil moisture contents ranging from 50 to 115% of the maximal water holding capacity and is compared with traditional sampling by suction cups. Metal concentrations obtained by the suction cup technique were consistently larger than those measured in the dialysate. Good agreement was obtained for Pb and Cu at soil moistures close to saturation after accounting for diffusion resistances whereas corrected Ni and Cd concentrations in the dialysates exceeded those measured by the suction cup technique. These deviations reflect inherent differences in the sampling mode and effects of soil heterogeneity at the microscale. Microdialysis offers new opportunities to probe solute concentrations at high spatial resolution and minimal disturbance of soil conditions at environmental interfaces such as the plant rhizosphere or at the transition between forest floors and the mineral soil.

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Section: Introductionmentioning

confidence: 99%

In-situ sampling of soil pore water: evaluation of linear-type microdialysis probes and suction cups at varied moisture contents

Miró

Fitz²,

Swoboda³

et al. 2010

Environ. Chem.

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“…For instance, fluoroquinolones were separated, utilizing a 15-kDa cellulose probe, in eggs 42 and in chicken liver and muscle, 43 metal ions in tomatoes 44 with a polyethersulfone membrane of 30-kDa cutoff, glucose, galactose, and lactose in milk 45 using a 20-kDa polyarylethersulfone (PAES) probe, catechins in tea 46 with a 13-kDa regenerated cellulose probe, and sinigrin in seeds of cruciferous vegetables (brussels, cauliflower, and cabbage) 47 with a 5-kDa cellulose acetate probe.…”

Section: Dialysis and Microdialysismentioning

confidence: 99%

Membrane-Based Extraction Techniques in Food Analysis

Buldini¹,

Mevoli²

2012

Comprehensive Sampling and Sample Preparation

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“…However, the literature is lacking reports on the analysis of metal ions and MD. Ion chromatography, inductively coupled plasma-MS and recently CE have been used for the determination of metal ions [63]. Studies involving the metal ion uptake in nature and the quantification of metal ions in the bloodstream could benefit from the application of MD sampling.…”

Section: Other Analytical Techniques Used In MDmentioning

confidence: 99%

“…Torto et al [63] carried out a study on the extraction fraction of metal ions Cd, Cr, Cu, Ni and Pb sampled by MD from a quiescent aqueous solution. A Varian AA-400 plus electro-thermal atomic absorption spectrometer, fitted with a Varian GTA-96 graphite tube atomiser, Zeeman background corrector and an auto-sampler were used.…”

Section: Other Analytical Techniques Used In MDmentioning

confidence: 99%

Current separation and detection methods in microdialysis the drive towards sensitivity and speed

Guihen

O’Connor

2009

Electrophoresis

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This review outlines some of the analytical challenges associated with the analysis of microdialysis (MD) samples, in particular, the minute complex sample volumes that are often encountered. In MD sampling many different low-molecular-weight molecules can be collected, but the research findings are often limited by the sensitivity, specificity, and reliability of the analytical technique that is coupled to the dialysis probe. Therefore it is critical that a lot of consideration is given in selecting the most suitable analytical method including the most appropriate detector. This review aims to highlight the strengths and weaknesses of a range of commonly used analytical methods employed in MD. In Section 1, a brief overview of the MD technique is described, followed by a discussion on some of the advantages and drawbacks of this sampling technique. Sections 2 and 3 examine analytical and other technical considerations regarding analysis, with special emphasis on the factors that specifically influence analytical detection. Section 4 outlines the most commonly employed analytical techniques used in MD, including HPLC coupled with various detectors. Detail is given regarding the LOD and LOQ for many applications using each detector. As MS is of such high importance in MD, a special sub-section has been devoted to it. The importance of CE is also highlighted, with specific applications described. In addition, analytical techniques that do not appear to have found routine use in MD are discussed. Section 5 is concerned with recent innovations in chemical separation techniques, in particular MCE and ultra-performance liquid chromatography. Specific applications of the coupling of these techniques with MD are highlighted, along with technical challenges associated with miniaturization. In the Section 6, the future outlook of MD is discussed. Techniques other than electrophoretic- and chromatographic based separation methods are outside the scope of this review.

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A study of microdialysis sampling of metal ions

Cited by 41 publications

References 26 publications

In-situ sampling of soil pore water: evaluation of linear-type microdialysis probes and suction cups at varied moisture contents

In-situ sampling of soil pore water: evaluation of linear-type microdialysis probes and suction cups at varied moisture contents

Membrane-Based Extraction Techniques in Food Analysis

Current separation and detection methods in microdialysis the drive towards sensitivity and speed

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