alexa Simple and simultaneous determination for 12 phenothiazines in human serum by reversed-phase high-performance liquid chromatography.
Pharmaceutical Sciences

Pharmaceutical Sciences

Pharmaceutica Analytica Acta

Author(s): Tanaka E, Nakamura T, Terada M, Shinozuka T, Hashimoto C,

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Abstract A high-performance liquid chromatographic method has been developed for the simultaneous analysis of the 12 phenothiazines (chlorpromazine, fluphenazine, levomepromazine, perazine, perphenazine, prochlorperazine, profenamine, promethazine, propericiazine, thioproperazine, thioridazine and trifluoperazine) in human serum using HPLC/UV. The separation was achieved using a C(18) reversed-phase column (250 mm x 4.6 mm I.D., particle size 5 microm, Inersil ODS-SP). The mobile phase, consisting of acetonitrile-methanol-30 mM NaH(2)PO(4) (pH 5.6) (300:200:500, v/v/v), was delivered at a flow rate of 0.9 mL/min and UV detection was carried out at 250 nm. The recoveries of the 12 phenothiazines spiked into serum samples were 87.6-99.8\%. Regression equations for the 12 phenothiazines showed excellent linearity, with detection limits of 3.2-5.5 ng/mL for serum. The inter-day and intra-day coefficients of variation for serum samples were commonly below 8.8\%. The selectivity, accuracy and precision of this method are satisfactory for clinical and forensic purposes. This sensitive and selective method offers the opportunity for simultaneous screening and quantification of almost all phenothiazines available in Japan for the purposes of clinical and forensic applications. This article was published in J Chromatogr B Analyt Technol Biomed Life Sci and referenced in Pharmaceutica Analytica Acta

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