Recovery studies by off‐line SFE

Sandra, Pat; David, Frank; Stottmeister, E.

doi:10.1002/jhrc.1240130416

Cited by 23 publications

(11 citation statements)

References 5 publications

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“…The wide spread use of these agents has led to extensive work being done for quality control and environmental contamination analysis using thin layer chromatography [28–29], gas chromatography [30], capillary electrophoresis [27,31] and liquid chromatography [32]. …”

Section: Resultsmentioning

confidence: 99%

Development of a fritless packed column for capillary electrochromatography–mass spectrometry

Bragg

Shamsi

2011

Journal of Chromatography A

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A novel procedure was developed for the fabrication of a fritless packed column for the coupling of capillary electrochromatography (CEC) to mass spectrometry (MS). The process involved the formation of internal tapers on two separate columns. Once the internal tapers are formed and the columns are packed, the untapered ends of each column were joined together by a commercially available connector. Several advantages of the fritless columns are described. First, the design used here eventually eliminates the need for any frits thus reducing the possibility of bubble formation seen with fritted packed columns. In addition, this is the first report in which the internal tapers are formed at both the inlet and outlet column ends making the fritless CEC-MS column more robust compared to only one report with externally tapered counterparts. Second, a comparison of internally tapered single frit packed CEC-MS (previously developed in our laboratory) column versus fritless CEC-MS column reported here shows that the latter provides better efficiency, suggesting no dead volume with equally good sensitivity and chiral resolution of (±)-aminoglutethimide. The fritless column procedure is universal and was used to prepare a series of columns with a variety of commercially available packing material (mixed mode strong cation exchange, SCX; mixed mode strong anion exchange, SAX; C-18) for the separation and MS detection of short chain non-chromophoric polar amines, long chain nonchromophic anionic surfactant as well as oligomers of non-chromophoric non-ionic surfactants, respectively. The fritless columns showed good intra-day repeatibility and inter-day reproducibility of retention times, chiral and achiral resolutions and peak areas. Very satisfactory column-to-column and operator-to-operator reproducibility was demonstrated.

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Section: Resultsmentioning

confidence: 99%

Development of a fritless packed column for capillary electrochromatography–mass spectrometry

Bragg

Shamsi

2011

Journal of Chromatography A

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“…Optimization of SFE conditions was initially carried out on a home-assembled system, consisting of a Carlo Erba 48O [4]. Optimized SFE extractions were performed on a Hewlett Packard H P 7680 SF extractor.…”

Section: Methodsmentioning

confidence: 99%

Applications in Environmental Analysis

2011

Artificial Neural Networks in Biological and Environmental Analysis

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The successful application of supercritical fluid extraction for environmental samples requires that the extraction conditions determined for spiked samples must be optimized in order to overcome the solute-matrix interactions that are responsible for lower recoveries in real samples compared to spiked samples. In this optimization, preserving the selectivity of exraction is a key factor. This principle is demonstrated by the extraction of PCBs from different matrices. Some other environmental examples also illustrate the importance of matrix-solute interactions.

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“…Details on the system have been described elsewhere [4]. Optimized SFE extractions were performed on a Hewlett Packard H P 7680 SF extractor.…”

Section: Methodsmentioning

confidence: 99%

Off-line supercritical fluid extraction-capillary GC applications in environmental analysis

David

Verschuere

Sandra

1992

Fresenius J Anal Chem

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Recovery studies by off‐line SFE

Cited by 23 publications

References 5 publications

Development of a fritless packed column for capillary electrochromatography–mass spectrometry

Development of a fritless packed column for capillary electrochromatography–mass spectrometry

Applications in Environmental Analysis

Off-line supercritical fluid extraction-capillary GC applications in environmental analysis

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