NDLI: Quantification of 5-aminolevulinic acid by CE using dynamic pH junction technique.

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Quantification of 5-aminolevulinic acid by CE using dynamic pH junction technique.

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Quantification of 5-aminolevulinic acid by CE using dynamic pH junction technique.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Hsieh, Bo-Chuan Chen, Richie L. C. Tsai, Tsuimin
Description	Country affiliation: Taiwan Author Affiliation: Hsieh BC ( Graduate Institute of Biomedical Materials and Tissue Engineering, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.)
Abstract	An online dynamic pH junction preconcentration method was developed for quantification of 5-aminolevulinic acid (ALA) by CE with the separation time less than 6 min. The optimal dynamic pH junction of ALA was carried out between pH 9.3 borate buffer (BGE, 40 mM) and pH 2.5 phosphate buffer (sample matrix, 40 mM) when 4.1 cm of sample plug was hydrodynamically injected into an uncoated fused-silica capillary (48.5 cm in length, id of 50 µm). If a 24 kV separation voltage was applied, the calibration curve of ALA peak area (200 nm) showed good linearity (R(2) = 0.9991) ranging from 0.01 to 6.5 mg/mL. The reproducibility of this system was excellent with RSDs (n = 10) of 2.5% for peak area response and 0.6% for migration time at ALA concentration of 0.5 mg/mL. The LOD was evaluated as 1.0 µg/mL (S/N > 3). Compared to conventional CE procedure, the sensitivity was successfully improved over 50-fold. The analytical results of pharmaceutical formulations show a good agreement with those by HPLC (r = 0.94).
File Format	HTM / HTML
ISSN	16159306
Issue Number	4
Journal	Journal of Separation Science
Volume Number	36
e-ISSN	16159314
Language	English
Publisher	Wiley-VCH
Publisher Date	2013-02-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Analytical Discipline Chemistry Aminolevulinic Acid Chemistry Electrophoresis, Capillary Methods Instrumentation Hydrogen-ion Concentration Evaluation Studies Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Filtration and Separation

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Quantification of 5-aminolevulinic acid by CE using dynamic pH junction technique.

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