SICRIT® SC-20X Flow-Through Dielectric Barrier Discharge Ion Source

Overview

The SICRIT® SC-20X Flow-Through Dielectric Barrier Discharge Ion Source is a next-generation ambient ionization technology engineered for real-time, solvent-free, and matrix-tolerant molecular analysis at atmospheric pressure. Developed from foundational research at ETH Zurich under Prof. Renato Zenobi and commercialized by Plasmion GmbH (Germany), SICRIT® (Soft Ionization by Chemical Reaction in Transfer) operates via low-energy dielectric barrier discharge (DBD) within a precisely engineered flow-through gas-phase reaction channel. Unlike conventional ion sources—such as ESI, APCI, DART, or DESI—it requires no nebulizing gas, carrier solvent, heating, vacuum interface modification, or sample derivatization. Analyte molecules—whether volatile, semi-volatile, or thermally labile—are ionized *in situ* during transit through the discharge zone, where reactive species (e.g., metastable He*, N₂⁺, O₂⁺, and hydrated clusters) induce soft, predominantly proton-transfer or charge-exchange reactions. This yields intact molecular ions ([M+H]⁺ or [M−H]⁻) with minimal fragmentation, high ion transmission efficiency, and negligible adduct formation—enabling direct coupling to mass spectrometers without signal suppression or source contamination typical of liquid-phase interfaces.

Key Features

• True Ambient & Solvent-Free Ionization: Eliminates dependence on LC mobile phases, GC carrier gases, or external reagent gases; operates stably using only ambient air or inert purge gas (optional).
• Universal Polarity Coverage: Simultaneously ionizes polar, moderately polar, and nonpolar compounds—including alkanes, PAHs, steroids, lipids, and volatile organic compounds (VOCs)—without bias or pre-treatment.
• Sub-Second Analysis Cycle: Achieves full-spectrum acquisition in ≤1 s per sample, supporting high-throughput screening of solids (tablets, leaves, food surfaces), liquids (serum, extracts), and headspace vapors.
• Minimal Parameter Optimization: Factory-calibrated discharge voltage and flow dynamics eliminate user-dependent tuning; reproducible performance across operators and labs.
• Modular Integration: Available in three configurations: SC-20X (standalone flow-through source), GC/SPME Module (for online solid-phase microextraction coupling), and GC-Ready Module (with temperature-stabilized transfer bridge for seamless GC-MS interfacing).
• Robust Architecture: Compact footprint (250 × 180 × 80 mm), lightweight (2.4 kg), and compatible with benchtop, portable (e.g., MT50), and field-deployable mass spectrometers—including SCIEX Triple Quad, Agilent Q-TOF, Thermo Orbitrap Exploris/QE, Bruker timsTOF, and Shimadzu LCMS-9030 platforms.

Sample Compatibility & Compliance

SICRIT® enables direct analysis of untreated samples across diverse physical states and matrices: intact pharmaceutical tablets, fresh plant tissues, food packaging surfaces, environmental wipe samples, biological fluids (urine, plasma), and headspace volatiles from clinical breath or fermentation headspace. Its lack of solvent dependency and absence of thermal degradation pathways ensure compliance with green analytical chemistry principles (ICH Q5C, ISO 14001). When integrated into regulated workflows—such as pesticide residue testing (AOAC Official Method 2021.03), forensic toxicology (SWGDAM Guidelines), or clinical metabolite quantification—the system supports audit-ready data acquisition when paired with 21 CFR Part 11–compliant software (e.g., Analyst™, Compound Discoverer™, or MassHunter™ with secure user authentication and electronic signature logging). No special exhaust or shielding is required; operation conforms to IEC 61000-6-3 (EMC) and IEC 61010-1 (safety) standards.

Software & Data Management

SICRIT® functions as a hardware-agnostic ion source: it does not require proprietary acquisition software. All spectral data are acquired natively through the host mass spectrometer’s vendor platform. For quantitative applications, MRM transitions (on QQQ), HRMS extracted ion chromatograms (XICs), or MS^E/DDA spectra (on Q-TOF/Orbitrap) are processed using validated workflows compliant with GLP/GMP documentation requirements. The source’s stability (<2% RSD over 24 h for internal standard response) facilitates long-duration unattended runs, while its compatibility with automated autosamplers (e.g., CTC PAL, LEAP PAL) ensures traceable sample tracking and chain-of-custody integrity. Raw data files retain full metadata—including discharge voltage, ambient temperature/humidity logs (via optional sensor integration), and instrument timestamping—supporting retrospective method reprocessing and regulatory review.

Applications

• Food & Agricultural Safety: Rapid screening of mycotoxins, pesticides, veterinary drug residues, and adulterants (e.g., melamine, Sudan dyes) directly from grain, fruit peel, or milk powder surfaces.
• Clinical & Forensic Toxicology: Direct detection of opioids, stimulants, novel psychoactive substances (NPS), and biomarkers in dried blood spots, oral fluid swabs, or postmortem vitreous humor—without extraction or derivatization.
• Environmental Monitoring: Real-time identification of PAHs, PCBs, flame retardants, and PFAS in air filters, soil extracts, or wastewater headspace.
• Pharmaceutical Development: In-process monitoring of API crystallinity, polymorph conversion, and excipient compatibility via vapor-phase fingerprinting.
• Volatile Organic Profiling: High-fidelity odorant mapping in fragrance development, spoilage detection in packaged foods, and disease-associated breath VOC signatures (e.g., lung cancer, diabetes).
• Materials & Packaging Science: Migration testing of plasticizers, antioxidants, and photoinitiators from food contact materials into simulants or actual products.

FAQ

Is SICRIT® compatible with my existing mass spectrometer?
Yes—SICRIT® is designed as a drop-in replacement for standard atmospheric pressure ion sources. Mechanical and electrical interfaces have been validated for SCIEX, Thermo Fisher, Agilent, Bruker, and Shimadzu systems. Adapter kits are available upon request.

Does SICRIT® require calibration standards for quantitative analysis?
Yes—quantitative accuracy follows standard MS methodology: stable-isotope-labeled internal standards are recommended for absolute quantitation; external calibration curves remain valid when matrix-matched controls are used.

Can SICRIT® replace GC-MS or LC-MS entirely?
No—it complements chromatographic separation rather than replaces it. SICRIT® excels in rapid screening and targeted analysis; GC/LC remains essential for isomeric resolution, complex mixture deconvolution, and trace-level sensitivity in highly contaminated matrices.

What maintenance is required?
The DBD electrode assembly has a service life exceeding 12 months under continuous operation. Routine cleaning involves isopropanol wipe-down of the inlet capillary and quartz discharge tube; no consumables (e.g., sprayers, nebulizer tips, or columns) are needed.

Is training provided for method development?
Yes—Plasmion and ASPEC jointly offer application-specific workshops covering source alignment, method transfer, and validation protocol design aligned with ISO/IEC 17025 and FDA Bioanalytical Method Validation Guidance.