Abstract
Accurate determination of serum and plasma aldosterone is essential for screening, diagnosis, and subtype classification of primary aldosteronism (PA). Its measurement is also used in the investigation of adrenal incidentaloma, adrenal carcinoma, Addison’s disease, congenital adrenal hyperplasia, renal artery stenosis, and renal tubular channelopathies. We describe a simple and robust method for the accurate and precise measurement of aldosterone in serum or plasma using liquid chromatography and tandem mass spectrometry (LC-MS/MS). After addition of internal standard, aldosterone is extracted from serum samples using supported liquid extraction (SLE) with methyl-t-butyl ether (MtBE). The MtBE is evaporated to dryness and sample is reconstituted with mobile phase before injection onto the LC-MS/MS and quantitation using an 8-point calibration curve. The assay calibration range is approximately 50–6500 pmol/L (0.16–234 ng/dL) with total imprecision between 6.8 and 4.1 % for concentrations between about 50 and 1000 pmol/L respectively.
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Van Der Gugten, J.G., Holmes, D.T. (2016). Quantitation of Aldosterone in Serum or Plasma Using Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS). In: Garg, U. (eds) Clinical Applications of Mass Spectrometry in Biomolecular Analysis. Methods in Molecular Biology, vol 1378. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-3182-8_5
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DOI: https://doi.org/10.1007/978-1-4939-3182-8_5
Publisher Name: Humana Press, New York, NY
Print ISBN: 978-1-4939-3181-1
Online ISBN: 978-1-4939-3182-8
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