1. Improvement of an Automated Sample Injection System for Pillar Array Columns to Increase Analytical Reproducibility.
- Author
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Kuroki, Hiroshi, Koyama, Hirotaka, and Tsunoda, Makoto
- Subjects
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COLUMNS , *AMINO acids , *STANDARD deviations , *QUANTITATIVE research - Abstract
In our previous study, we developed an automatic sample injection system for pillar array columns for quantitative analysis. An autosampler was used to maintain a constant sample injection volume. However, the sample was diluted during injection using the autosampler, thus deteriorating the analytical reproducibility. In this study, we have substituted the autosampler with a syringe pump to overcome the abovementioned problem and improve the system. Sample dilution was avoided by filling the entire capillary with the sample at a constant rate. This improved system also increased the analytical reproducibility. In the previous system, the relative standard deviation (RSD) exceeded 17% of the peak height for coumarin dyes. In contrast, the improved system decreased the RSD to the range 1.2–1.8%. The analytical reproducibility was evaluated by using five types of amino acids. The RSD of each peak height was within 3.0%, confirming good reproducibility. These results indicate that the sample injection method developed in this study can be applied to biological sample analyses as a simple quantitative analysis method for pillar array columns. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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