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- W3090354671 abstract "Microcapillary electrophoresis (μCE) enables high-resolution separations in miniaturized, automated microfluidic devices. Pairing this powerful separation technique with laser-induced fluorescence (LIF) enables a highly sensitive, quantitative, and compositional analysis of organic molecule monomers and short polymers, which are essential, ubiquitous components of life on Earth. Improving methods for their detection has applications to multiple scientific fields, particularly those related to medicine, industry, and space science. Here, a modular benchtop system using μCE with LIF detection was constructed and tested by analyzing standard amino acid samples of valine, serine, alanine, glycine, glutamic acid, and aspartic acid in multiple borate buffered solutions of increasing concentrations from 10 mM to 50 mM, all pH 9.5. The 35 mM borate buffer solution generated the highest resolution before Joule heating dominated. The limits of detection of alanine and glycine using 35 mM borate buffer were found to be 2.12 nM and 2.91 nM, respectively, comparable to other state-of-the-art μCE-LIF instruments. This benchtop system is amenable to a variety of detectors, including a photomultiplier tube, a silicon photomultiplier, or a spectrometer, and currently employs a spectrometer for facile multi-wavelength detection. Furthermore, the microdevice is easily exchanged to fit the desired application of the system, and optical components within the central filter cube can be easily replaced to target alternative fluorescent dyes. This work represents a significant step forward for the analysis of small organic molecules and biopolymers using μCE-LIF systems." @default.
- W3090354671 created "2020-10-08" @default.
- W3090354671 creator A5028199157 @default.
- W3090354671 creator A5045457122 @default.
- W3090354671 creator A5050345829 @default.
- W3090354671 creator A5079913197 @default.
- W3090354671 date "2020-10-01" @default.
- W3090354671 modified "2023-10-16" @default.
- W3090354671 title "A modular, easy-to-use microcapillary electrophoresis system with laser-induced fluorescence for quantitative compositional analysis of trace organic molecules" @default.
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- W3090354671 doi "https://doi.org/10.1063/5.0008734" @default.
- W3090354671 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33138565" @default.
- W3090354671 hasPublicationYear "2020" @default.
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