Kikuchi Needle EX Chromatographic Gas Sampler

Overview

The Kikuchi Needle EX Chromatographic Gas Sampler is a precision-engineered, reusable solid-phase micro-sampling device designed for quantitative collection and subsequent thermal desorption of volatile organic compounds (VOCs) from ambient air or confined headspace environments. Unlike conventional canister or bag-based sampling methods, the Needle EX employs a stainless-steel needle housing packed with proprietary sorbent material—optimized for high-affinity, selective retention of polar and non-polar VOCs across a broad volatility range (C2–C10). Its operation relies on passive diffusion-assisted adsorption during controlled manual aspiration via the KITAGAWA AP-20N or AP-20B handheld pump, enabling reproducible, low-volume (10–100 mL), low-flow (2 L/min) sampling under defined pressure differential (≤0.5 bar vacuum). The device is explicitly intended for integration into validated gas chromatography (GC) workflows—particularly for trace-level environmental monitoring, industrial hygiene assessment, and laboratory-based method development requiring high sensitivity and minimal sample dilution.

Key Features

• Reusable stainless-steel needle format with calibrated internal sorbent bed, supporting ≥25–30 thermal desorption cycles without measurable performance degradation
• Optimized for compatibility with KITAGAWA AP-20N and AP-20B manual pumps—enabling precise, operator-controlled sampling volumes of 10 mL, 50 mL, or 100 mL
• Stable flow delivery (2 L/min) with ≤5% variation under variable backpressure conditions; integrated flowmeter certified to ±2% full-scale accuracy
• Robust mechanical design rated for >5,000 operational hours at maximum specified load (2 L/min against 0.5 bar resistance)
• No external power supply required—fully portable and intrinsically safe for field deployment in non-hazardous zones
• Minimal dead volume and low carryover characteristics ensure high analytical fidelity during GC injection and quantitation

Sample Compatibility & Compliance

The Needle EX demonstrates validated affinity for a wide spectrum of target analytes relevant to occupational health and environmental standards, including but not limited to: alcohols (ethanol, isopropanol), esters (ethyl acetate), aromatic hydrocarbons (toluene, xylene), tertiary amines (trimethylamine), and low-molecular-weight carboxylic acids (propionic, isobutyric, n-butyric, isovaleric acid). Its sorbent chemistry enables efficient capture of both polar and semi-volatile species at sub-ppbv concentration levels when coupled with cold trap–GC–FID or GC–MS detection. The system supports compliance with ISO 16000-6 (indoor air VOC sampling), ASTM D5466 (standard test method for determination of VOCs in air using sorbent tubes), and OSHA Method 1007/1018 where manual, low-volume sampling is permitted. All components are RoHS-compliant and constructed from electropolished stainless steel to prevent catalytic decomposition or surface adsorption artifacts.

Software & Data Management

As a hardware-only sampling interface, the Needle EX does not incorporate embedded firmware or digital connectivity. However, it is fully compatible with standard laboratory data management systems through integration with validated GC instrument control software (e.g., Agilent OpenLab CDS, Thermo Chromeleon, Shimadzu GCsolution). When used within GLP- or GMP-regulated environments, sampling events—including pump actuation count, batch lot tracking of needles, and thermal desorption parameters—must be manually recorded in audit-trail-capable electronic lab notebooks (ELNs) or LIMS platforms compliant with FDA 21 CFR Part 11 requirements. Calibration certificates for associated flowmeters and thermal desorbers are supplied with traceability to JIS Z 8000 and NIST-traceable references.

Applications

• Trace VOC monitoring in indoor air quality (IAQ) surveys and building commissioning studies
• Workplace exposure assessment for solvents and process emissions in pharmaceutical, coating, and electronics manufacturing
• Odor source identification and quantification in wastewater treatment plants and food processing facilities
• Method validation and reference standard preparation for EPA TO-17 and ISO 16017-1 compliant analyses
• Portable leak detection and fugitive emission screening in maintenance and QA/QC field operations
• Research-grade sampling for kinetic sorption/desorption studies and breakthrough curve modeling

FAQ

Can the Needle EX be used with automated sampling systems?
No—it is mechanically and dimensionally optimized for manual actuation via KITAGAWA AP-20N/AP-20B pumps only. Integration with motorized or programmable samplers is not supported.
What is the recommended desorption protocol?
Thermal desorption should be performed at 250–300 °C for 3–5 minutes in a standard GC cold trap or dedicated thermal desorber, followed by rapid transfer to the analytical column.
Is conditioning required before first use?
Yes—each new Needle EX must undergo a pre-conditioning cycle: heat at 320 °C for 10 minutes under inert gas purge to remove residual manufacturing contaminants.
How is calibration verified?
Calibration is maintained through periodic verification using certified gas standards (e.g., NIST-traceable VOC permeation tubes) and comparison against parallel sorbent tube sampling per ISO 16017-2.
Does the device meet explosion-proof certification requirements?
No—the Needle EX contains no electrical components and is not rated for Class I Division 1 hazardous locations; use requires adherence to site-specific ATEX or IECEx zone classification protocols.