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  • Title: Development of a validated high-throughput LC-ESI-MS method for determination of sirolimus on dried blood spots.
    Author: Rao RN, Maurya PK, Ramesh M, Srinivas R, Agwane SB.
    Journal: Biomed Chromatogr; 2010 Dec; 24(12):1356-64. PubMed ID: 21077255.
    Abstract:
    A high-throughput liquid chromatography-electrospray ionization mass spectrometric (LC-ESI-MS) method for screening of sirolimus on dried blood spots (DBS) was developed and validated. It involves solvent extraction of a punch of DBS followed by reversed-phase LC on a relatively new monolithic column consisting of a silica rod with bimodal pore structure and detection by ESI-MS. The run time was less than 3 min with a very low backpressure at a flow rate of 0.5 mL/min. The method can analyze more than 100 samples in an 8 h working day, including sample preparation. The assay was linear from 1 to 100 ng/mL. The mean recovery was 92.42%. The mean inter-day and intra-day precisions were 1.23 and 1.41%, respectively. The developed method is simple, rapid and useful for clinical applications.
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