IONICON Nasal Sampling Probe

Overview

The IONICON Nasal Sampling Probe is a purpose-engineered, thermally controlled inlet device designed for direct, non-invasive sampling of exhaled or inhaled air from the human nasal cavity in real time. It serves as a dedicated front-end interface for Proton Transfer Reaction Mass Spectrometry (PTR-MS) systems—specifically optimized to capture volatile organic compounds (VOCs), odorants, and trace metabolites with high temporal fidelity during human sensory or respiratory studies. Unlike conventional breath samplers, this probe integrates precision thermal management to prevent condensation and adsorption losses, ensuring quantitative transfer of labile, low-concentration analytes (e.g., aldehydes, terpenes, sulfur compounds) from the humid, temperature-sensitive nasal environment into the PTR-MS reaction chamber. Its design adheres to physiological constraints: minimal intranasal volume displacement, low flow resistance (< 5 mbar at 100 mL/min), and ISO 8573-1 Class 2 compressed-air compatibility for clean gas supply integration.

Key Features

• Heated stainless-steel sampling tip (operable up to 60 °C) with PID-controlled temperature stability ±0.5 °C to suppress water condensation and surface adsorption
• Ultra-fast response time (< 100 ms T₉₀) enabled by short internal path length (< 15 cm) and low-dead-volume PTFE-lined capillary tubing
• Ergonomic, adjustable nasal interface with medical-grade silicone flange for secure, subject-tolerant placement across diverse anthropometric profiles
• Integrated bypass flow control (0–500 mL/min) for dynamic dilution calibration and background subtraction without interrupting sampling
• Electromagnetic interference (EMI)-shielded signal cable compliant with IEC 61326-1 for stable operation in clinical or multi-instrument laboratory environments
• CE-marked per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD); RoHS 2011/65/EU compliant

Sample Compatibility & Compliance

The Nasal Sampling Probe supports human subjects aged ≥12 years in controlled settings such as sensory labs, clinical pharmacokinetic studies, and olfactory neuroscience experiments. It is compatible with all IONICON PTR-TOF and PTR-QiTOF platforms, as well as third-party PTR-MS instruments meeting standard 1/4″ Swagelok inlet specifications and vacuum interface requirements (≤1 × 10⁻⁵ mbar operating pressure). The probe complies with ISO/IEC 17025:2017 general requirements for competence of testing and calibration laboratories when used within validated method protocols. For GLP-regulated inhalation exposure studies, it supports full audit trails when paired with IONICON’s Time-of-Flight Data Acquisition Software (v3.2+), including timestamped metadata logging of temperature, flow rate, and operator ID.

Software & Data Management

Data acquisition is fully integrated via IONICON’s TOF-DAQ software suite, which provides synchronized triggering between nasal airflow onset (detected via integrated differential pressure sensor) and mass spectral acquisition. Raw ion signals are exported in HDF5 format with embedded calibration coefficients and environmental metadata (temperature, humidity, ambient pressure). The software supports automated peak alignment across sequential inhalation cycles using retention time normalization algorithms and enables batch processing for longitudinal cohort analysis. All data handling conforms to FDA 21 CFR Part 11 requirements when deployed with electronic signature modules and role-based access control (RBAC) configurations.

Applications

• Real-time quantification of odorant release kinetics during food consumption or fragrance exposure
• In vivo assessment of nasal metabolism of inhaled drugs (e.g., corticosteroids, nicotine analogs)
• Validation of nasal spray deposition efficiency and regional distribution patterns
• Dynamic monitoring of endogenous VOC biomarkers (e.g., acetone, isoprene, methanol) during metabolic stress challenges
• Human factors evaluation of HVAC odor dispersion and indoor air quality interventions
• Method development for ASTM E2877-22 (Standard Guide for Sensory Evaluation of Odor Intensity)

FAQ

Is the Nasal Sampling Probe compatible with non-IONICON PTR-MS instruments?
Yes—provided the instrument accepts a standard 1/4″ Swagelok inlet connection, operates under high vacuum (≤1 × 10⁻⁵ mbar), and supports external TTL trigger input for synchronization.
What maintenance is required between subjects?
A 60-second purge with dry nitrogen (500 mL/min) is recommended; no disassembly or cleaning is needed. The heated tip prevents residue accumulation during routine use.
Can the probe be sterilized for repeated clinical use?
The silicone flange is autoclavable (121 °C, 20 min); the heated metal body is wipe-clean only with 70% isopropanol. Full sterilization of the entire assembly is not supported.
Does the system support simultaneous bilateral sampling?
No—this is a single-channel probe. Bilateral measurements require two synchronized probes and dual-channel acquisition hardware.
What is the maximum recommended sampling duration per session?
Continuous operation is rated for ≤2 hours at 60 °C; extended sessions (>4 h) require intermittent cooling intervals to maintain thermal sensor accuracy.