{
  "id": 14810227,
  "title": "Benchmarking the Performance of a Commercial Electrostatic Linear Ion Trap (ELIT) Charge Detection Mass Spectrometer For Higher-Order Antibody Aggregate Analysis",
  "url": "https://urgent.news/2026/10/15/benchmarking-the-performance-of-a-commercial-electrostatic-linear-ion",
  "topic": "science",
  "section": "Science",
  "published": "2026-10-15T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.10.08.757778v1?rss=1"
  },
  "original_language": "en",
  "account": "The analysis of higher-order antibody aggregates presents significant challenges for conventional mass spectrometry due to their low abundance, broad mass distributions, and extensive heterogeneity. Researchers evaluated the practical performance of a commercial electrostatic linear ion trap charge detection mass spectrometer, the XevoTM CDMS, for therapeutic antibody analysis. The platform demonstrated reproducible mass and charge measurements, with repeatability and intermediate-precision relative standard deviations (RSDs) below 1%. It maintained consistent mass determination across varying concentration and solution conditions.\n\nControlled mixtures of antibody-derived species exhibited a linear molar-ratio-dependent ion response, allowing for semi-quantitative estimation of relative species abundance under specific conditions. When analyzing heat-stressed trastuzumab, CDMS measurements showed qualitative consistency with SEC-MALS, mass photometry, and conventional native MS. Importantly, CDMS enabled direct mass determination of individual ions within highly heterogeneous high-molecular-weight (HMW) populations that displayed extensive charge-state overlap and were difficult to separate using conventional native MS.\n\nIncorporating a high-duty-cycle acquisition increased the sampling of low-abundance, high-m/z ions, improving access to higher-order aggregate signals. Joint single ion mass-charge analysis successfully differentiated statistical ion families within the broad HMW fraction. By relating major mass differences to independently obtained compositional information, the study highlighted the XevoTM CDMS as a practical and multidimensional platform for comprehensive antibody aggregate characterization.",
  "summary": "Higher-order antibody aggregates remain challenging to characterize using conventional mass spectrometry because of their low abundance, broad mass distributions, and extensive heterogeneity. Here, the practical performance of a commercial electrostatic linear ion trap charge detection mass spectrometer (XevoTM CDMS) was evaluated for therapeutic antibody analysis. The platform provided…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}