SCIEX API 4000 Q-Trap Liquid Chromatography Tandem Mass Spectrometer (Used)
| Brand | SCIEX |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | API 4000 Q-Trap |
| Instrument Type | Triple Quadrupole Linear Ion Trap Hybrid |
| Mass Range | 5–2000 m/z |
| Sensitivity | <10 fg on-column for SRM (e.g., reserpine) |
| Resolution | Unit mass resolution (0.7 Da full width at half maximum) |
| Accurate Mass Capability | Not applicable (nominal mass instrument) |
| Ion Source Options | TurboIonSpray® and APCI® with plug-and-play interchangeability |
| Collision Cell | LINAC™ high-efficiency linear accelerator collision cell |
| Detection System | Pulse-counting electron multiplier |
| Dynamic Range | 1–4 × 10⁶ cps |
| Vacuum System | Dual-stage turbomolecular pumps with air-cooled design |
| Operating Temperature | 15–30 °C |
| Power Supply | 208–240 V AC, 50/60 Hz |
| Required Gases | High-purity nitrogen (≥99.999%), zero-air (oil-free, particle-free compressed air) |
Overview
The SCIEX API 4000 Q-Trap LC-MS/MS is a hybrid triple quadrupole–linear ion trap mass spectrometer engineered for high-sensitivity quantitative analysis and structural characterization in regulated and research laboratories. Its architecture integrates a conventional triple quadrupole (Q1–q2–Q3) configuration with a linear ion trap (LIT) in the final quadrupole (Q3), enabling simultaneous or sequential operation in multiple reaction monitoring (MRM), enhanced product ion (EPI), precursor ion scanning, neutral loss scanning, and information-dependent acquisition (IDA) modes. The system employs electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) via the TurboIonSpray® and TurboAPCI® sources—both optimized for robustness, low maintenance, and compatibility with standard HPLC flow rates (up to 1 mL/min without splitting). Core innovations—including the patented Curtain Gas™ interface, V-shaped Turbo Ion Source geometry, and LINAC™ collision cell—collectively enhance ion transmission efficiency, reduce matrix-induced suppression, minimize carryover, and extend operational uptime between maintenance cycles.
Key Features
- Hybrid Q-Trap Architecture: Combines triple quadrupole quantitation precision with linear ion trap capabilities for comprehensive qualitative screening within a single run.
- TurboIonSpray® & TurboAPCI® Sources: Plug-and-play interchangeable probes featuring dual heater zones, optimized gas dynamics, and self-cleaning probe surfaces—enabling stable ion generation across wide polarity and volatility ranges.
- LINAC™ Collision Cell: A pressurized, high-voltage linear accelerator region that improves fragment ion transmission and reduces residence time, thereby minimizing memory effects in MRM assays and increasing duty cycle for multi-analyte workflows.
- Curtain Gas™ Technology: A proprietary differential pumping interface that separates source region contaminants from the mass analyzer, significantly reducing chemical noise and extending detector lifetime.
- Pulse-Counting Detector: Supports rapid polarity switching (<100 ms) and delivers a dynamic range of 1–4 × 10⁶ cps for both positive and negative ion modes.
- Robust Vacuum Architecture: Dual-stage turbomolecular pumps with air-cooling eliminate the need for liquid nitrogen or external chillers, supporting unattended overnight operation.
Sample Compatibility & Compliance
The API 4000 Q-Trap accommodates diverse sample types—including small-molecule pharmaceuticals, peptides, metabolites, environmental contaminants, and forensic toxicants—across complex biological matrices (plasma, urine, tissue homogenates) and environmental extracts. Its performance aligns with method validation requirements outlined in FDA Guidance for Industry (Bioanalytical Method Validation, May 2018), ICH M10, and USP <1225>. Data acquisition and processing comply with 21 CFR Part 11 when used with compliant software (e.g., Analyst® 1.7.2 or later with audit trail, electronic signature, and user access controls enabled). Routine operation supports GLP- and GMP-aligned workflows, including instrument qualification (IQ/OQ/PQ), preventive maintenance logging, and calibration verification per ASTM E2621–22 (Standard Guide for Mass Spectrometry Data System Validation).
Software & Data Management
Controlled via SCIEX Analyst® software, the system provides integrated instrument control, real-time data acquisition, post-run processing, and report generation. Analyst supports automated peak integration, internal standard normalization, calibration curve fitting (linear/log-linear with weighting), and batch processing with customizable QC flagging. Raw data files (.wiff) are stored in a structured, vendor-agnostic format compatible with third-party platforms (e.g., Skyline, Compound Discoverer, SimGlycan) for retrospective reprocessing. Audit trail functionality records all parameter changes, data modifications, and user logins—meeting traceability requirements for regulatory submissions. Data backups adhere to ISO/IEC 27001–aligned retention policies, and network deployment supports centralized instrument monitoring across multi-lab environments.
Applications
- Pharmacokinetics & Drug Metabolism: Quantification of parent drugs and phase I/II metabolites in plasma, bile, and microsomal incubations using stable isotope-labeled internal standards.
- Clinical Toxicology & Forensic Screening: Multi-analyte panels for opioids, benzodiazepines, stimulants, and novel psychoactive substances in whole blood and oral fluid.
- Environmental & Food Safety Analysis: Residue testing of pesticides, veterinary drugs, mycotoxins, and persistent organic pollutants (POPs) in crops, meat, dairy, and water.
- Natural Product Chemistry: Dereplication and structural elucidation of flavonoids, alkaloids, and saponins from botanical extracts using IDA-driven EPI spectra.
- Proteomics Support: Targeted peptide quantification (SRM/MRM) and limited top-down characterization of modified peptides under denaturing conditions.
FAQ
Is the API 4000 Q-Trap suitable for regulated bioanalysis?
Yes—when operated with validated methods, calibrated standards, and Analyst software configured for 21 CFR Part 11 compliance, it meets FDA, EMA, and PMDA expectations for small-molecule PK/PD studies.
What maintenance intervals are recommended for the ion source and detector?
Ion source cleaning is typically required every 2–4 weeks depending on sample cleanliness; detector replacement is recommended after ~1.5–2 years of continuous use or upon observed signal decay >20% in calibration check standards.
Can the system be upgraded to support newer software versions?
Analyst® 1.7.2 remains the final officially supported version for the API 4000 platform; hardware firmware updates are no longer issued, but legacy software licensing and technical support remain available through authorized SCIEX service partners.
Does the Q-Trap configuration support high-resolution scanning?
No—the API 4000 is a nominal-mass instrument with unit mass resolution; high mass accuracy and isotopic fidelity require time-of-flight (TOF) or Orbitrap-based platforms.
What consumables are critical for daily operation?
Essential consumables include TurboIonSpray and TurboAPCI probes, stainless steel capillaries, curtain gas filters, turbo pump oil (if oil-lubricated backup pumps are installed), and high-purity nitrogen and zero-air supply lines with inline particulate/moisture traps.
