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  • Title: A RIA combined with SPE for the determination of a dual D2-receptor and beta2-adrenoceptor agonist, AR-C68397XX, in human plasma.
    Author: Willson VJ, Preston JR, Lockley WJ, Mather A, Singh J, Wilkinson D.
    Journal: J Pharm Biomed Anal; 2000 Feb; 22(1):155-63. PubMed ID: 10727135.
    Abstract:
    A radioimmunoassay has been developed for the determination of AR-C68397XX, a dual D2-receptor and beta2-adrenoceptor agonist, in human plasma. The method incorporates solid phase sample extraction and is suitable for the determination of the analyte at pg ml(-1) concentrations. The antiserum was raised in Suffolk cross sheep following primary and booster immunisations with an immunogen prepared by conjugating a carboxyphenylmethyl derivative of AR-C68397XX, to bovine serum albumin. The radioligand was prepared by the 125I-labelled iodination of a derivative of AR-C68397XX. The solid phase extraction procedure, using octadecyl sorbent, was introduced to remove matrix interferences in the plasma and to enhance method sensitivity. The calibration range is 20-500 pg ml(-1), using 0.5 ml of undiluted human plasma sample.
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