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An optimized method for corticosterone analysis in mouse plasma by ultra-performance liquid chromatography-full-scan high-resolution accurate mass spectrometry.

Journal of chromatographic science (2014-06-13)
Hui Li, Li-Ping Sheng, Bing Wang, Zong-Lin Yang, Shu-Ying Liu
ABSTRACT

A simple method based on liquid chromatography-full-scan high-resolution accurate mass spectrometry (LC-HRMS) using a quadrupole time-of-flight (TOF) mass spectrometry was developed and optimized for corticosterone quantification in mouse plasma. Mouse plasma (100 μL) was extracted with methyl tert-butyl ether using prednisone as internal standard. Separation was performed on a short C18 column using a methanol-water gradient. Full-scan data were acquired in the TOF only mode, and extracted ion chromatograms were generated post-acquisition with the extract masses of the analytes. Enhanced sensitivity and reproducibility were acquired with optimized mass parameters. The calibration range was 8.24-412 ng/mL, and the limit of quantitation was 5.088 g/mL. Accuracy was between -5.9 and 8.6%. The precision of between-run (interday) and within-run (intraday) was within 5.6 and 6.9%, respectively. The LC-HRMS method was applied for plasma samples analysis from the stressed mice with and without ginseng treatment for the stress state estimation.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
tert-Butyl methyl ether, anhydrous, 99.8%
Sigma-Aldrich
tert-Butyl methyl ether, suitable for HPLC, ≥99.8%
Sigma-Aldrich
tert-Butyl methyl ether, ACS reagent, ≥99.0%
Sigma-Aldrich
tert-Butyl methyl ether, HPLC Plus, for HPLC, GC, and residue analysis, 99.9%
Sigma-Aldrich
Dibutyl ether, anhydrous, 99.3%
Sigma-Aldrich
tert-Butyl methyl ether, reagent grade, ≥98%
Supelco
tert-Butyl methyl ether, analytical standard
Sigma-Aldrich
tert-Butyl methyl ether, puriss. p.a., ≥99.5% (GC)
Supelco
tert-Butyl Methyl Ether, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
tert-Butyl methyl ether, HPLC Plus, for HPLC, GC, and residue analysis, 99.9%
Sigma-Aldrich
Dibutyl ether, ReagentPlus®, ≥99%
Sigma-Aldrich
tert-Butyl methyl ether, reagent grade, 98%
Supelco
tert-Butyl methyl ether, HPLC grade, suitable for HPLC, 99.8%