Global Urinary Volatolomics with (GC×)GC-TOF-MS

Anal Chem. 2023 Nov 28;95(47):17170-17176. doi: 10.1021/acs.analchem.3c02523. Epub 2023 Nov 15.

Abstract

Urinary volatolomics offers a noninvasive approach for disease detection and monitoring. Herein we present an improved methodology for global volatolomic profiling. Wide coverage was achieved by utilizing a multiphase sorbent for volatile organic compound (VOC) extraction. A single, midpolar column gas chromatography (GC) assay yielded substantially higher numbers of monitored VOCs compared to our previously reported single-sorbent method. Multidimensional GC (GC×GC) enhanced further biomarker discovery while data analysis was simplified by using a tile-based approach. At the same time, the required urine volume was reduced 5-fold from 2 to 0.4 mL. The applicability of the methodology was demonstrated in a pancreatic ductal adenocarcinoma cohort where previous findings were confirmed while a series of additional VOCs with diagnostic potential were discovered.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chromatography, Gas
  • Gas Chromatography-Mass Spectrometry / methods
  • Humans
  • Volatile Organic Compounds* / analysis

Substances

  • Volatile Organic Compounds