Waters Xevo TQ-S Triple Quadrupole Mass Spectrometer

Overview

The Waters Xevo TQ-S is a high-performance triple quadrupole mass spectrometer engineered for demanding quantitative and qualitative UPLC®/MS/MS applications. It operates on the principle of tandem mass spectrometry (MS/MS) in multiple reaction monitoring (MRM) mode, delivering exceptional sensitivity, specificity, and reproducibility for trace-level analyte detection across complex matrices. Designed as a robust, enterprise-grade platform, the Xevo TQ-S integrates seamlessly with Waters ACQUITY UPLC systems to enable sub-picomolar detection limits—critical for regulated bioanalysis, ADME studies, food safety screening, environmental residue analysis, and forensic toxicology. Its architecture reflects a rigorous balance between analytical fidelity and operational reliability, supporting GLP- and GMP-compliant workflows through hardware-level stability and software-controlled audit trails.

Key Features

• StepWave™ Ion Optics: A patented off-axis ion transmission technology that significantly enhances ion transmission efficiency while reducing chemical noise from neutral species and solvent clusters. This results in up to 10× higher signal-to-noise ratios compared to conventional axial sources—without compromising duty cycle or dynamic range.
• ScanWave™ Collision Cell: An optimized RF-only quadrupole collision cell enabling rapid, high-fidelity MS/MS scanning with minimal peak distortion. It supports both fast MRM transitions and high-resolution product ion scans within a single acquisition, facilitating simultaneous quantitation and structural confirmation.
• RADAR™ Acquisition Mode: A real-time, information-rich data acquisition strategy that interleaves targeted MRM channels with full-scan MS/MS events. This allows concurrent generation of quantitative data for priority analytes and untargeted spectral fingerprints of co-eluting components—ideal for method development and matrix interference assessment.
• Engineered Simplicity™ Design Philosophy: Intuitive hardware layout, tool-free source access, and automated calibration routines reduce operator dependency and minimize downtime. The system supports hot-swappable ion sources (ESI, APCI, APPI) without venting the vacuum manifold.
• Robust Vacuum Architecture: Dual-stage turbomolecular pumping system ensures stable base pressure (<5 × 10⁻⁸ Torr) during extended batch runs, maintaining consistent sensitivity and mass accuracy over multi-day sequences.

Sample Compatibility & Compliance

The Xevo TQ-S accommodates a broad spectrum of sample types—from small-molecule pharmaceuticals and metabolites to peptides, lipids, and polar contaminants—across diverse biological, environmental, and food matrices. Its ion source flexibility enables reliable analysis of thermally labile, non-volatile, or highly polar compounds. The instrument complies with key regulatory frameworks including FDA 21 CFR Part 11 (electronic records/signatures), ISO/IEC 17025 (testing laboratory competence), and ICH M10 (bioanalytical method validation). Full system qualification packages—including IQ/OQ/PQ documentation—are available to support audit readiness in regulated environments.

Software & Data Management

Controlled via Waters MassLynx™ v4.2 or later, the Xevo TQ-S supports integrated method setup, real-time data acquisition, and post-run processing within a validated software environment. Key capabilities include:

• Dynamic MRM optimization with auto-tuning and retention time alignment
• Quantitation using internal standard normalization with weighted linear regression (1/x or 1/x²)
• Comprehensive reporting templates aligned with USP , EMA, and FDA bioanalytical guidance
• Secure user access controls, electronic signatures, and full audit trail logging per 21 CFR Part 11 requirements
• Export compatibility with third-party LIMS and CDS platforms via ASTM E1384 and ANSI/X3.279 standards

Applications

The Xevo TQ-S serves as a primary platform for quantitative LC-MS/MS in core application domains requiring high confidence in low-abundance detection:

• Pharmaceutical Bioanalysis: PK/PD studies, clinical trial sample analysis, and biomarker validation at pg/mL levels in plasma, urine, and tissue homogenates.
• ADME Screening: Rapid identification and quantification of drug metabolites using RADAR-enabled retrospective data mining.
• Food Safety: Multi-residue analysis of pesticides, veterinary drugs, and mycotoxins in compliance with EU SANTE/11813/2017 and USDA FSIS guidelines.
• Environmental Monitoring: Detection of persistent organic pollutants (POPs), PFAS, and endocrine disruptors in water, soil, and biota at sub-ng/L concentrations.
• Forensic Toxicology: Confirmation and quantification of controlled substances, novel psychoactive substances (NPS), and doping agents per WADA Technical Document TD2023DL.

FAQ

What distinguishes the Xevo TQ-S from earlier TQ models?
The Xevo TQ-S introduces StepWave ion optics and ScanWave collision cell technology—delivering improved sensitivity, faster dwell times, and enhanced full-scan MS/MS performance without trade-offs in quantitative precision.
Is the system compatible with non-Waters UPLC/HPLC systems?
Yes—the Xevo TQ-S accepts standard LC interfaces via analog/digital I/O and supports external trigger synchronization for third-party chromatography systems.
Does it support 21 CFR Part 11 compliance out of the box?
When deployed with MassLynx v4.2+ and configured with appropriate IT infrastructure (e.g., domain authentication, encrypted storage), the system meets all technical requirements for electronic records and signatures under 21 CFR Part 11.
Can RADAR data be reprocessed retrospectively for new analytes?
Yes—RADAR-acquired full-scan MS/MS data retains all precursor/product ion information, enabling post-acquisition extraction of new MRM transitions without re-injecting samples.
What service and support options are available globally?
Waters offers comprehensive support packages including preventive maintenance contracts, remote diagnostics, application-specific training, and certified field service engineers in over 40 countries.