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On-line coupling of solid-phase extraction with mass spectrometry for the analysis of biological samples. II. Determination of clenbuterol in urine using multiple-stage mass spectrometry in an ion-trap mass spectrometer.
van Hout MW, Hofland CM, Niederländer HA, de Jong GJ. van Hout MW, et al. Among authors: hofland cm. Rapid Commun Mass Spectrom. 2000;14(22):2103-11. doi: 10.1002/1097-0231(20001130)14:22<2103::AID-RCM138>3.0.CO;2-V. Rapid Commun Mass Spectrom. 2000. PMID: 11114016