Analysis of 27 β-Blockers and Metabolites in Milk Powder by High Performance Liquid Chromatography Coupled to Quadrupole Orbitrap High-Resolution Mass Spectrometry

Jian-Qiao Cheng,Feng Zhang,Chuan-Sheng Wang,Xue-Mei Nie,Feng-Ming Chen,Tong Liu

doi:10.3390/molecules24040820

Abstract

This paper presents an application of high performance liquid chromatography coupled with quadrupole orbitrap high-resolution mass spectrometry (HPLC-Q-Orbitrap HRMS) for the analysis of 27 β-blockers and metabolites in milk powder. Homogenized milk power samples were extracted by acetonitrile and purified by using Oasis PRiME HLB solid-phase extraction cartridges. The Ascentis® C8 chromatographic column was used to separate the analytes. The quantification was achieved by using matrix-matched standard calibration curves with carazolol-d7 and propranolol-d7 as the internal standards. The results show an exceptional linear relationship with the concentrations of analytes over wide concentration ranges (0.5–500 μg kg−1) as all the fitting coefficients of determination r2 are > 0.995. All the limits of detection (LODs) and quantitation (LOQs) values were within the respective range of 0.2–1.5 μg kg−1 and 0.5–5.0 μg kg−1. Overall average recoveries were able to reach 66.1–100.4% with the intra- and inter-day variability under 10%. This method has been successfully applied to the screening of β-blockers and metabolites in commercial milk powders. At the same time, the corresponding characteristic fragmentation behavior of the 27 compounds was explored. The characteristic product ions were determined and applied to the actual samples screening.

Highlights

The European Union and the International Codex Alimentarius Commission have asked for maximum residue limits (MRLs) of carazolol in edible animal tissues, with MRLs of 25 μg kg−1 for porcine kidney and 15 μg kg−1 for bovine kidney
(1.7 μm, 50 × 2.1 mm, Milford, MA, USA) were evaluated in (0.1% Formic acid (FA)) H2 O-MeCN in their appropriate gradient elution at 0.5 mL min−1
Similar separation performances for total analytes were observed by Molecules 2019, 24, x FOR PEER REVIEW

Summary

Introduction

Overall average recoveries were able to reach 66.1–100.4% with the intra- and inter-day variability under 10% This method has been successfully applied to the screening of β-blockers and metabolites in commercial milk powders. 1. Introduction β-blockers (BBS) are structurally analogous to the catecholamines, which can act as non-specific β-adrenergic receptor blocking agents. Introduction β-blockers (BBS) are structurally analogous to the catecholamines, which can act as non-specific β-adrenergic receptor blocking agents They play an extremely important role in the treatment of cardiovascular diseases such as coronary heart disease, hypertension, arrhythmia and cardiac insufficiency. The European Union and the International Codex Alimentarius Commission have asked for MRLs of carazolol in edible animal tissues, with MRLs of 25 μg kg−1 for porcine kidney and 15 μg kg−1 for bovine kidney.

Methods

Results

Conclusion