RUNRONG INSTRUMENT N-A Series Membrane-Based Nitrogen Generator for LC-MS Systems

Overview

The RUNRONG INSTRUMENT N-A Series is a dedicated membrane-based nitrogen generator engineered to deliver high-purity, oil-free nitrogen gas continuously for liquid chromatography–mass spectrometry (LC-MS) applications. Unlike pressure swing adsorption (PSA) systems, this generator employs hollow-fiber polymeric membranes that selectively permeate oxygen, water vapor, and CO₂ from compressed air, retaining nitrogen with typical purity levels of 95–99.5% (v/v), depending on flow rate and inlet conditions. Its design prioritizes operational stability under 24/7 duty cycles—critical for unattended LC-MS runs, especially in high-throughput analytical laboratories, QC/QA facilities, and regulated pharmaceutical environments. The system integrates seamlessly with major commercial LC-MS platforms including Agilent, Thermo Fisher Scientific, SCIEX, Shimadzu, and Puyu Instruments, eliminating dependency on high-pressure nitrogen cylinders and reducing logistical overhead, safety hazards, and long-term operating costs.

Key Features

• Robust membrane separation core using high-selectivity hollow-fiber modules, rated for >10,000 hours of continuous operation
• Integrated industrial-grade imported air compressor with thermal overload protection and low-noise enclosure (≤62 dB(A) at 1 m)
• Multi-stage filtration system: coalescing pre-filter (0.01 µm), activated carbon adsorber, and particulate final filter (0.003 µm), compliant with ISO 8573-1 Class 2:2:2 for compressed air quality
• Stainless steel and brass fittings throughout; all tubing rated for sustained operation at ≥145 psi and temperatures up to 60 °C
• Real-time pressure monitoring via analog gauge and digital display; adjustable output pressure regulator with fine-tuning capability (±1 psi resolution)
• Modular architecture enabling scalable deployment—single-unit or manifold-configured multi-point distribution for labs operating multiple LC-MS instruments

Sample Compatibility & Compliance

The N-A Series is validated for use with electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) sources across all mainstream LC-MS configurations. Its nitrogen output meets the gas quality requirements specified in ASTM D6352-22 (Standard Guide for Gas Purity in Mass Spectrometry) and aligns with instrument OEM recommendations for nebulizer, desolvation, and curtain gas supply. All internal wetted materials are certified non-leaching per USP , and the unit complies with CE marking directives (2014/30/EU EMC, 2014/35/EU LVD). Optional documentation packages support GLP/GMP audit readiness, including IQ/OQ protocols, calibration certificates traceable to NIST standards, and full material declarations.

Software & Data Management

While the N-A Series operates as a standalone hardware platform without embedded firmware or network connectivity, it supports integration into laboratory infrastructure via analog 4–20 mA pressure/flow output signals (optional upgrade). Comprehensive user documentation includes maintenance logs, filter replacement schedules, and preventive service checklists aligned with ISO/IEC 17025:2017 clause 6.4.1. For laboratories implementing electronic recordkeeping, the generator’s operational parameters can be logged externally via PLC or SCADA systems. All service records and calibration data are structured to satisfy FDA 21 CFR Part 11 requirements when paired with validated third-party data acquisition software.

Applications

• Nebulizer and desolvation gas supply for ESI/APCI sources in small-molecule quantitation, metabolomics, and biopharmaceutical characterization
• Curtain gas delivery in triple quadrupole (QQQ) and Q-TOF instruments requiring stable, low-particulate nitrogen streams
• Carrier gas for GC-MS interfaces where ultra-high purity is not mandated but consistent dew point control is essential
• Backup or primary nitrogen source in ISO 17025-accredited testing labs performing pesticide residue analysis, environmental screening, and clinical toxicology
• Gas supply for automated sample preparation workstations requiring inert atmosphere during derivatization or solvent evaporation steps

FAQ

What is the typical nitrogen purity delivered by the N-A Series at maximum flow?
At 70 L/min output, nitrogen purity ranges between 95.0% and 97.5%, verified by onboard electrochemical O₂ sensor (0–25% range, ±0.2% accuracy). Purity increases inversely with flow rate.
Can this generator support multiple LC-MS instruments simultaneously?
Yes—custom manifolds with pressure-balanced distribution headers and individual shut-off valves are available upon engineering review of total demand, piping layout, and pressure drop calculations.
Is the unit compatible with LC-MS systems requiring zero-oil air?
Absolutely—the integrated compressor uses oil-free scroll technology, and all downstream filtration ensures compliance with ISO 8573-1 Class 0 for oil content (<0.01 mg/m³).
What maintenance intervals are recommended?
Coalescing filter: every 2,000 operating hours or 6 months; activated carbon cartridge: every 4,000 hours or 12 months; membrane module: inspection at 8,000 hours; full service by certified technician annually.
Does RUNRONG provide validation support for regulated environments?
Yes—qualified installation qualification (IQ), operational qualification (OQ), and performance qualification (PQ) documentation packages are available, including test protocols, raw data templates, and deviation handling procedures per Annex 15 of EU GMP Guidelines.