In crucial sectors such as semiconductor manufacturing, pharmaceuticals, food production, and petrochemicals, bulk and high-purity gases play a foundational role. Even the slightest trace-level impurities can severely compromise safety, process stability, and final product quality, making the precise determination of reactive impurities and permanent gases at ppb levels an absolute necessity.
To meet these demanding specifications, the GAS High Purity Analyser (HPA) utilizes a highly sophisticated and robust configuration. Built primarily around the Thermo Trace GC 1600 platform, the instrument is equipped with a Pulsed Discharge Detector (PDD / PDHID), two purged diaphragm valves, and three dedicated separation columns. During operation, a 10-port valve injects the sample and systematically backflushes the matrix compound using the first capillary column. Carbon dioxide is isolated on the second column before eluting to the PDD. Meanwhile, permanent gases like H₂, O₂, N₂, CH₄, and CO are temporarily sequestered, separated on the third column, and then precisely detected. This meticulous process ensures exceptional sensitivity, delivering a minimum detectability of under 10 ppb and high repeatability, thoroughly satisfying stringent ASTM analytical methodologies.
Benefits
Ultra-Low Detection Limits: Capable of detecting gas impurities at concentrations below 10 ppb, varying slightly based on the specific component and system setup.
Pulsed Discharge Detection (PDD): Employs a universal detector that successfully identifies nearly all gas components, with the exception of helium.
Extremely Leak-Tight Design: Features diaphragm valves equipped with an internal purge option to guarantee minimized background noise and maximized analytical sensitivity.
Flexible Configuration Options: Offers highly adaptable setups, including choices between capillary or packed columns, heartcut and backflush capabilities, multi-channel arrangements, and comprehensive bulk gas management.
Proven, Robust GC Platforms: Built upon the reliable Thermo Trace GC1600 and CompactGC4.0 systems to deliver maximum uptime alongside low maintenance requirements.
| Category | Specification |
|---|---|
| Analyser Platform | Thermo Trace GC1600 or CompactGC4.0 |
| Target Components | H₂, O₂, N₂, CH₄, CO, CO₂, and specialty gases |
| Supported Matrices | C2/C3 hydrocarbons, bulk industrial, and reactive gases |
| Detector Type | Pulsed Discharge Detector (PDD / PDHID) |
| Valve Technology | 2 purged diaphragm gas switching valves (10-port) |
| Column Setup | 3 capillary columns (e.g., Rt-Qbond, Rt-MSieve) |
| Data System | Chromeleon chromatography data system |
| Analysis Runtime | 7 minutes |
| Limit of Detection | < 10 ppb (component dependent) |
| Repeatability | < 1 % |
High Purity Hydrocarbon Streams (C2 & C3): Effectively determine trace permanent gases within ethylene and propylene streams in accordance with the ASTM D8098 standard.
Bulk Industrial Gases (High Purity Industrail Gas): Thoroughly analyze impurities present in carbon dioxide, argon, helium, oxygen, nitrogen, and hydrogen.
Permanent Gas Impurity Analysis: Accurately measure low ppb concentrations of H₂, O₂, N₂, CH₄, CO, and CO₂ utilizing GC-PDD technology.
Specialty and Reactive Gases: Highly suitable for evaluating specialty gases including SiH₄, NH₃, SF₆, CF₄, HCl, Cl₂, GeH₄, N₂O, Xe, and Kr.
Quality Control and Specification Testing: Establish precise gas purity specifications required for manufacturing, official certification, and fulfilling supply contracts.
Standard Adherence: The analyser is fully compliant with ASTM D2504, ASTM D2505, and ASTM D8098 testing methods for the determination of trace impurities.
