Multielement analysis of single red blood cells by single cell - inductively coupled plasma tandem mass spectrometry

Talanta. 2024 Jan 15:267:125226. doi: 10.1016/j.talanta.2023.125226. Epub 2023 Sep 20.

Abstract

A method for the analysis of essential metals (Fe, Cu, Mg, and Zn) and non-metals (P, S) in single red blood cells was developed by single cell (SC)-ICP-MS. The use of a triple quadrupole configuration (MS/MS) enabled an effective elimination of polyatomic interferences, which affect the accuracy of ICP-MS analysis using a single quadrupole mass analyzer. Fixation with glutaraldehyde for at least 90 days was developed to improve the quantification of elements in a single red blood cell. The experimental conditions were optimized while special attention was paid to the residence time of analytes in the plasma. Addition of a surfactant (0.05% (v/v) Tween80®) improved quantification of elements in fixed red blood cells. The detection limits obtained by SC-ICP-MS/MS were lower than for ICP-MS, especially for S and P (3 fg and 1.7 fg. cell-1 instead of 163 and 6.3 fg. cell-1, respectively).

Keywords: Erythrocytes; Fixation; ICP-MS/MS; Red blood cells; SC-ICP-MS; Single cell.

MeSH terms

  • Erythrocytes / chemistry
  • Metals* / analysis
  • Spectrum Analysis
  • Tandem Mass Spectrometry*

Substances

  • Metals