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HPLC determination of methylphenidate and its metabolite, ritalinic acid, by high-performance liquid chromatography with peroxyoxalate chemiluminescence detection

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Abstract

An HPLC–peroxyoxalate chemiluminescence (PO-CL) method for simultaneous determination of methylphenidate (MPH) and ritalinic acid (RA) was developed. The method was used to monitor MPH and RA after administration of MPH to rats. Deproteinized plasma spiked with 1-(3-trifluoromethylphenyl)piperazine (IS) was dried and labeled with 4-(N,N-dimethylaminosulfonyl)-7-fluoro-2,1,3-benzoxadiazole (DBD-F). The labeled sample was cleaned with two kinds of solid-phase extraction cartridge, and the DBD-labels were separated on an ODS column with gradient elution using a mixture of CH3CN and imidazole–HNO3 buffer. Separation of MPH and RA can be achieved within 33 min. The LODs of MPH and RA at a signal-to-noise ratio of 3 were 2.2 and 0.4 ng mL−1, respectively. Moreover, monitoring of MPH and RA after MPH administration (10 mg kg−1) to rat could be performed. The concentration of RA 480 min after administration was eight times higher than that of MPH. The proposed HPLC–PO-CL method was useful for determination of MPH and RA in rat plasma and was successfully used to monitor these substances after MPH administration.

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Authors and Affiliations

  1. Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan

    Mitsuhiro Wada, Keisuke Abe, Rie Ikeda, Naotaka Kuroda & Kenichiro Nakashima

  2. National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya, Tokyo, 158-8501, Japan

    Ruri Kikura-Hanajiri

Authors
  1. Mitsuhiro Wada
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  2. Keisuke Abe
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  3. Rie Ikeda
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  4. Ruri Kikura-Hanajiri
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  5. Naotaka Kuroda
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  6. Kenichiro Nakashima
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Correspondence to Kenichiro Nakashima.

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Published in the special issue Analytical and Bioanalytical Luminescence with Guest Editor Petr Solich.

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Wada, M., Abe, K., Ikeda, R. et al. HPLC determination of methylphenidate and its metabolite, ritalinic acid, by high-performance liquid chromatography with peroxyoxalate chemiluminescence detection. Anal Bioanal Chem 400, 387–393 (2011). https://doi.org/10.1007/s00216-011-4713-0

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  • DOI: https://doi.org/10.1007/s00216-011-4713-0

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