An Alternative Interface for a Flow Injection-Capillary Electrophoresis System with Electrokinetic Injection

Teshima, Norio; Hino, Takuma; Sakai, Tadao

doi:10.2116/analsci.23.751

Cited by 6 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…functioned simultaneously as both outlet and ground electrodes. This interface is based on the design by Teshima et al 25 for FI-CE; however, the relative positions of the capillary and ground electrode were inverted with respect to the cited design. The outlet side of the capillary was introduced into a glass vial of 25 mL filled with BGE.…”

Section: Introductionmentioning

confidence: 99%

Identification of Inorganic Improvised Explosive Devices Using Sequential Injection Capillary Electrophoresis and Contactless Conductivity Detection

et al. 2011

View full text Add to dashboard Cite

A simple sequential injection capillary electrophoresis (SI-CE) instrument with capacitively coupled contactless conductivity detection (C(4)D) has been developed for the rapid separation of anions relevant to the identification of inorganic improvised explosive devices (IEDs). Four of the most common explosive tracer ions, nitrate, perchlorate, chlorate, and azide, and the most common background ions, chloride, sulfate, thiocyanate, fluoride, phosphate, and carbonate, were chosen for investigation. Using a separation electrolyte comprising 50 mM tris(hydroxymethyl)aminomethane, 50 mM cyclohexyl-2-aminoethanesulfonic acid, pH 8.9 and 0.05% poly(ethyleneimine) (PEI) in a hexadimethrine bromide (HDMB)-coated capillary it was possible to partially separate all 10 ions within 90 s. The combination of two cationic polymer additives (PEI and HDMB) was necessary to achieve adequate selectivity with a sufficiently stable electroosmotic flow (EOF), which was not possible with only one polymer. Careful optimization of variables affecting the speed of separation and injection timing allowed a further reduction of separation time to 55 s while maintaining adequate efficiency and resolution. Software control makes high sample throughput possible (60 samples/h), with very high repeatability of migration times [0.63-2.07% relative standard deviation (RSD) for 240 injections]. The separation speed does not compromise sensitivity, with limits of detection ranging from 23 to 50 μg·L(-1) for all the explosive residues considered, which is 10× lower than those achieved by indirect absorbance detection and 2× lower than those achieved by C(4)D using portable benchtop instrumentation. The combination of automation, high sample throughput, high confidence of peak identification, and low limits of detection makes this methodology ideal for the rapid identification of inorganic IED residues.

show abstract

Section: Introductionmentioning

confidence: 99%

Identification of Inorganic Improvised Explosive Devices Using Sequential Injection Capillary Electrophoresis and Contactless Conductivity Detection

et al. 2011

View full text Add to dashboard Cite

show abstract

“…In developing the flow‐injection sample introduction in CE, an interface based on electrokinetic injection 161 and an individual instrument, incorporating a CCD detector 162, have been proposed for direct CE analysis from a flowing solution. The performance of both constructions was evaluated by the monitoring of metal ions.…”

Section: Miscellaneousmentioning

confidence: 99%

Inorganic species analysis by CE – An overview for 2007–2008

Timerbaev

2009

Electrophoresis

View full text Add to dashboard Cite

This review article represents the sixth in a series of reviews on CE applied to inorganic analysis, appearing in this journal, and focuses on material published in 2007-2008. As a fundamental review, it examines primarily those documents in which the emphasis is on advances in general CE methodology which are traditionally set on the attainment of higher detection sensitivity and greater preconcentration factors both in capillary and microchip separation formats. Following a major research trend of the previous review period (see A.R. Timerbaev, Electrophoresis 2007, 28, 3420-3425), publications focusing on the quantification of different element species continue to rapidly outpace other applications. A range of practicable separation and detection designs tailor-made to species-selective analysis are critically discussed in order to assess their impact on the rate of development and wide acceptance of CE in the field.

show abstract

“…Recently, Teshima et al 12 described a newly designed alternative interface for FI‐CE based on electrokinetic injection. The schematic diagrams of the FI‐CE system and the FI‐CE interface are shown in Fig.…”

Section: New Interfaces Of the Fi‐ce Systemmentioning

confidence: 99%

The combination of flow injection with electrophoresis using capillaries and chips

et al. 2009

View full text Add to dashboard Cite

The technique of combined flow injection CE (FI-CE) integrates the essential favorable merits of FI and CE. It utilizes the various excellent on-line sample pretreatments and preconcentration (such as cloud point extraction, SPE, ion-exchange, dynamic pH junction and head-column field-amplified sample stacking technique) of FI, which has the advantages of high speed, accuracy, precision and avoiding manual handling of sample and reagents. Therefore, the coupling of FI-CE is an attractive technique; it can significantly expand the application of CE and has achieved many publications since its first appearance. The basic principles, instrumental developments and applications of FI-CE system from 2006 to 2008 are reviewed.

show abstract

An Alternative Interface for a Flow Injection-Capillary Electrophoresis System with Electrokinetic Injection

Cited by 6 publications

References 19 publications

Identification of Inorganic Improvised Explosive Devices Using Sequential Injection Capillary Electrophoresis and Contactless Conductivity Detection

Identification of Inorganic Improvised Explosive Devices Using Sequential Injection Capillary Electrophoresis and Contactless Conductivity Detection

Inorganic species analysis by CE – An overview for 2007–2008

The combination of flow injection with electrophoresis using capillaries and chips

Contact Info

Product

Resources

About