Enhancing Sensitivity of CZE by On-Line Isotachophoretic Sample Pretreatment

Flottmann, Dirk; Hins, J.; Meissner, Th; Dietrich, Carsten; Rettenmaier, Christian

doi:10.1365/s10337-004-0241-9

Cited by 5 publications

(8 citation statements)

References 10 publications

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“…In this sense, capillary electromigration methods can play an important role in this type of determinations, including the analysis of food colorants [140][141][142][143][144][145], sweeteners [146], and preservatives [147,148].…”

Section: Food Additivesmentioning

confidence: 99%

“…Also, the sensitivity enhancement derived from the combined use of isotachophoresis and capillary zone electrophoresis using a commercial instrument with two coupled capillaries was investigated by Flottmann et al [148]. As an application of this combination, sorbic and ascorbic acid were analyzed in an "alcopop"-drink at the nanomolar range [148].…”

Section: Food Additivesmentioning

confidence: 99%

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Recent advances in the application of capillary electromigration methods for food analysis

García‐Cañas

Cifuentes

2007

Electrophoresis

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Section: Food Additivesmentioning

confidence: 99%

Section: Food Additivesmentioning

confidence: 99%

Recent advances in the application of capillary electromigration methods for food analysis

García‐Cañas

Cifuentes

2007

Electrophoresis

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“…Compared with other CE/CEC methods on the separation and determination of organic acids, this method had some obvious advantages, such as fast and efficient separation, no EOF modifiers (e.g., organic reagents and surfactants) used in the analysis process, no timeconsuming column fabrication and no severe detection interference etc. (Flottmann et al 2004;Li et al 2013;Kuban and Karlberg 1997;Saavedra et al 2000;Zhu et al 2012). To the best of our knowledge, this was the first report on the separation and detection of organic acids in real blueberry juice samples by using hexadimethrine bromide as PSPs in CE-ESIMS.…”

Section: Introductionmentioning

confidence: 85%

Simultaneous separation and determination of organic acids in blueberry juices by capillary electrophoresis- electrospray ionization mass spectrometry

Yong-ku

Wang

et al. 2014

J Food Sci Technol

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A sensitive and expeditious capillary e l e c t r o p h o r e s i s -e l e c t r o s p r a y i o n i z a t i o n m a s s spectrometry(CE-ESIMS) method for the separation, identification and determination of succinic, citric, salicylic, malic, benzoic, sorbic, ascorbic, and tartaric acid in blueberry juices has been developed. In order to obtain the analytical separation, CE-MS interface parameters(e.g., buffer pH and composition, sheath liquid and gas flow rates, sheath liquid composition, electrospray voltage, etc.) were carefully optimized. Eight organic acids were baseline separated in 8 min under optimum experimental conditions. The precisions for eight replicate separations of a standard mixture solution were 2.54-4.12 % for peak area and 0.85-2.12 % for migration time respectively. The linear ranges were 10.0-1000.0, 8.0-1000.0, 13.0-1000.0, 6.0-1000.0, 9.0-1000.0, 3.2-600.0, 6.0-1000.0 and 18.0-1000.0 μg/L for succinic, citric, salicylic, malic, benzoic, sorbic, ascorbic, and tartaric acid with detection limits of 2.5, 2.0, 3.4, 1.5, 2.2, 0.8, 1.5, 4.5 μg/L, respectively. The average recoveries of the eight components were between 86.8 and 99.8 % with RSDs of 1.8-5.3 %. The proposed method was applied to the simultaneous analysis of eight analytes in Blueberry Juice samples with satisfactory results.

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“…Lysozyme was determined in selected food products with an LOQ of 1 mg/L (LE: 10 mM NH 4 OH, 20 mM acetic acid; TE: 5 mM EACA, 5 mM acetic acid; BGE: 20 mM EACA, 5 mM acetic acid, 0.1% HPMC) [90]. Sorbic and ascorbic acids were determined in a so-called "alco-pop"-drink (LE: 10 mM HCl 1 histidine, 0.1% MHEC, pH 6.0; TE: 5 mM MES 1 histidine; BGE: 100 mM MES 1 histidine, pH 5.4) [91]. Imazalil and its residues were determined in food packaging extracts and in apples, respectively, using a system in 25% methanol (LE: 5 mM NH 4 OH, 10 mM acetic acid; TE: 5 mM acetic acid; BGE: 10 mM acetic acid, 10 mM EACA) [92].…”

Section: Online Itp-czementioning

confidence: 99%

Recent progress in capillary ITP

2007

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ITP has been attracting constant attention for many years due to its principal capability to concentrate trace analytes by several orders of magnitude. In the current capillary format, it is able to concentrate trace analytes diluted to several microliters of an original sample into concentrated zones having volumes in the range of picoliters. Due to this reason, ITP holds an important position in many current multistage and multidimensional separation schemes. This article links up previous reviews on the topic and summarizes the progress of analytical capillary ITP since 2002. Almost 100 papers are reviewed that include methodological novelties, instrumental aspects, and analytical applications. Papers using ITP and/or isotachophoretic principles as part of multistage and/or multidimensional separation schemes are also included.

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Enhancing Sensitivity of CZE by On-Line Isotachophoretic Sample Pretreatment

Cited by 5 publications

References 10 publications

Recent advances in the application of capillary electromigration methods for food analysis

Recent advances in the application of capillary electromigration methods for food analysis

Simultaneous separation and determination of organic acids in blueberry juices by capillary electrophoresis- electrospray ionization mass spectrometry

Recent progress in capillary ITP

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