Interfacing a microchip-based capillary electrophoresis system with a microwave induced plasma spectrometry for copper speciation

• Authors: Henryk Matusiewicz , Mariusz Ślachciński
• Languages of publication: EN

Abstracts

EN

A microchip-based capillary electrophoresis (µCE) system was interfaced with a microwave induced plasma optical emission spectrometry (MIP-OES) to provide copper species separation capabilities. This system uses an extremely low flow demountable direct injection high efficiency nebulizer (D-DIHEN) sited directly at the liquid exit of the chip. A supplementary flow of buffer solution at the channel exit was used to improve nebulization efficiency. A small evaporation chamber has been incorporated into the interface in order to prevent the losses associated with traditional spray chambers, allowing the entire aerosol sample to enter the plasma. Syringe pumps were used to manipulate the flow rate and flow direction of the sample, buffer, and supplementary buffer solution. Sample volumes of 25 nL can be analyzed. With application of an electric field up to 500 V cm−1, species such as Cu(II) and Cu(EDTA)2− were separated in acidic solution within 90 s using a 26 mm long separation channel etched in a glass base. Resolution of the Cu(II) and Cu(EDTA)2− peaks was 1.1 using the chip-based µCE-MIP-OES system. [...]

Keywords

EN

Microwave induced plasma spectrometry; Capillary electrophoresis; Micronebulizer; Chip technology; Copper species

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2011
• Volume: 9
• Issue: 5
• Pages: 896-903

Dates

published

1 - 10 - 2011

online

24 - 7 - 2011

Contributors

author

Henryk Matusiewicz

• Department of Analytical Chemistry, Politechnika Poznańska, 60-965, Poznań, Poland

author

Mariusz Ślachciński

• Department of Analytical Chemistry, Politechnika Poznańska, 60-965, Poznań, Poland

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Identifiers

DOI

10.2478/s11532-011-0079-6