Thermo Fisher VeriSpray Paper Spray Ion Source

Overview

The Thermo Fisher VeriSpray Paper Spray Ion Source is an ambient, direct ionization interface engineered for seamless integration with Thermo Scientific TSQ-series triple quadrupole mass spectrometers. It implements the Paper Spray ionization principle—a low-voltage electrospray technique where analytes are extracted and ionized directly from a porous cellulose substrate (the VeriSpray paper plate) under application of a high-voltage potential and a small volume of solvent (<10 µL). Unlike conventional LC-MS workflows, VeriSpray eliminates chromatographic separation entirely, enabling rapid, on-paper sample introduction with no derivatization, extraction, or cleanup required. This architecture supports trace-level detection of small molecules—including pharmaceuticals, toxins, metabolites, and pesticides—in complex matrices such as whole blood, urine, saliva, tissue homogenates, and environmental extracts. The system operates within the established physical constraints of electrospray ionization physics, maintaining compatibility with standard ESI tuning parameters and mass calibration protocols across the TSQ platform.

Key Features

• Fully integrated hardware-software control via native Xcalibur™ instrument control software (v4.3 SP1 or higher), including dedicated VeriSpray method editor and workflow templates
• Disposable, barcoded VeriSpray PaperSpray sample plates—designed for reproducible capillary-driven solvent flow and consistent spray stability across batches
• Automated high-throughput operation supporting up to 240 samples per unattended run when paired with optional robotic plate loader
• Reduced solvent consumption: typical usage is ≤8 µL per analysis, resulting in >90% reduction versus conventional LC-MS methods
• No column degradation, pump maintenance, or mobile phase optimization—lowering total cost of ownership and instrument downtime
• Robust mechanical design with modular mounting compatible with all TSQ-series MS platforms without hardware modification
• Compliant with GLP/GMP-aligned data integrity requirements through full audit trail logging in Xcalibur™ and TraceFinder™

Sample Compatibility & Compliance

VeriSpray accommodates raw or minimally processed biological and environmental specimens—including dried blood spots (DBS), oral fluid swabs, plant tissue lysates, and aqueous environmental extracts—without centrifugation, filtration, or solid-phase extraction. Each VeriSpray plate incorporates standardized geometry and surface chemistry to ensure inter-plate reproducibility (CV <12% RSD for mid-fg–ng analyte levels under controlled humidity conditions). The system meets analytical validation prerequisites outlined in FDA Guidance for Bioanalytical Method Validation (2018) and supports compliance with ISO/IEC 17025:2017 for testing laboratories. All software modules—including Xcalibur™ and TraceFinder™—are validated for 21 CFR Part 11 compliance, providing electronic signatures, user access controls, and immutable audit trails for regulated environments.

Software & Data Management

The VeriSpray platform relies on two core software components: Xcalibur™ for real-time instrument control, method development, and raw data acquisition; and TraceFinder™ (v4.1 SP5 or later) for targeted quantitative analysis in regulated domains (e.g., clinical toxicology, food safety residue testing, forensic screening). Xcalibur™ includes a dedicated VeriSpray Method Editor that allows precise configuration of spray voltage, solvent delivery timing, and MS acquisition parameters—including scheduled MRM transitions synchronized to plate position. All methods are stored with metadata tags (operator ID, timestamp, plate barcode), and raw files (.raw) retain embedded source configuration logs. TraceFinder™ integrates with LIMS systems via standard ASTM E1467-compliant export formats and supports automated calibration curve generation, matrix-matched QC flagging, and batch reprocessing—all traceable through secure user authentication.

Applications

VeriSpray delivers validated performance in time-critical, high-volume analytical scenarios: therapeutic drug monitoring (TDM) in emergency departments using finger-prick blood; rapid pesticide screening in fruit/vegetable extracts; point-of-need detection of illicit drugs in oral fluid; quantification of mycotoxins in grain homogenates; and high-throughput metabolite profiling in pharmacokinetic studies. Its ambient nature enables deployment in non-traditional lab settings—including mobile clinical units and field-deployable analytical stations—while maintaining sensitivity comparable to conventional LC-MS/MS for compounds with pKa <10 and logP between –1 and 5. Published method validations confirm LODs at sub-pg/mL levels for amphetamines, benzodiazepines, and beta-blockers in DBS matrices.

FAQ

Is VeriSpray compatible with non-TSQ Thermo mass spectrometers?
No—VeriSpray is exclusively designed for TSQ-series triple quadrupole instruments (Altis, Quantis, Fortis, Quantiva, Endura) due to proprietary electrical and pneumatic interface specifications.
Can VeriSpray plates be reused?
No—VeriSpray plates are single-use, sterile-barrier packaged consumables. Reuse compromises ionization efficiency and introduces carryover risk.
Does VeriSpray require method re-validation when switching between biological matrices?
Yes—matrix effects vary significantly between plasma, urine, and tissue. Full validation per ICH M10 is recommended for each new matrix.
What solvent systems are supported?
Methanol/water (80:20 v/v) with 0.1% formic acid is standard; acetonitrile/water and isopropanol/water mixtures have been demonstrated in peer-reviewed applications.
How is calibration performed?
External calibration using serial dilutions spotted onto separate VeriSpray plates; internal standards (stable isotope-labeled analogs) are strongly recommended for quantitative rigor.