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Quantitation of Cabergoline at Extremely Low Plasma Concentrations with ,,, a Triple Quadrupole Mass Spectrometer

lysis of drug combination products. Typically, method development is biased towards optimizing the detection limit for the lower concentration analyte, sacrificing detector saturation of the higher concentration analytes. Since linear range of the high concentration analyte is compromised, sample dilution and subsequent analysis becomes unavoidable; this contributes considerably to overall sample analysis time and, thus, does not lend itself to highthroughput applications. Hence, the extended linear dynamic range of the TSQ Quantum is extremely beneficial in these situations.

Conclusions

The TSQ Quantum operated at unit resolution shows tremendous utility in the development of highly sensitive detection methods for ergoline derivatives such as cabergoline. Sensitivity on the TSQ Quantum is ~20 times better than that reported on the TSQ 7000 while only requiring a fraction of the sample previously used. Furthermore, analysis of low plasma concentrations of cabergoline was performed in a complex, minimally treated plasma matrix. The broad dynamic range of the TSQ Quantum, coupled with the excellent precision and accuracy in unit resolution, is of particular importance for applications where detector saturation is typically encountered. The broad dynamic range, therefore, allows for easy development of methods suitable for the analysis of drugs administered at any given dose (low and high), for drugs and their metabolites, and for drug combination products. For these reasons, the TSQ Quantum should find widespread use in the development of sensitive, simple, fast, accurate, and rugged methods for many pharmacokinetic applications.

References

1. Andreotti AC, Pianezzola E, Persiani S, Pacciarini MA, Strolin Benedetti M, Pontiroli, AE. J. Clin. Endoc
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