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We wish to thank Shionogi Pharmaceutical Co., Ltd. and Japan Roche Co., Ltd. for providing us with the samples of benzodiazepines.
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Kakizaki, T., Hasebe, K., Yoshida, H. et al. Improvement of Signal-to-Noise Ratio of Polarographic Detector in Liquid Chromatography. ANAL. SCI. 3, 469–471 (1987). https://doi.org/10.2116/analsci.3.469
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DOI: https://doi.org/10.2116/analsci.3.469