GB/T 14599—2025 High-Purity Oxygen Testing Solutions and Instrument Configuration Recommendations

As GB/T 14599—2025 “Pure Oxygen, High-Purity Oxygen, and Ultra-Pure Oxygen” With its release, the quality control requirements for pure oxygen, high-purity oxygen, and ultra‑pure oxygen have been further upgraded. GB/T 14599—2025 has replaced GB/T 14599—2008; the standard was… Published on August 29, 2025, and effective March 1, 2026. The new version of the standard not only revises the technical requirements for pure oxygen, high-purity oxygen, and ultra‑pure oxygen, but also updates provisions related to sampling, test methods, inspection rules, labeling and packaging, transportation and storage, as well as safety information.

For manufacturers of high-purity oxygen, gas companies, third-party testing laboratories, users of electronic-grade gases, and enterprises supplying medical and industrial oxygen, establishing a high-purity oxygen testing system that meets the requirements of the new national standard—featuring sufficiently low detection limits, stable repeatability, and safe, reliable operation—has become a key focus in upgrading laboratory capabilities and quality control both before and after the standard’s implementation.

Liaoning Kerui Chromatography Technology Co., Ltd. combines GB/T 14599—2025 New National Standard for High-Purity Oxygen The requirements for the testing of critical impurities are based on KR-LGS 2032 Series Gas Chromatography Analysis Platform , we have launched a high-purity oxygen analysis solution that covers key impurities—including hydrogen, argon, nitrogen, carbon monoxide, carbon dioxide, and total hydrocarbons—providing instrument configuration guidelines for manufacturers’ outgoing inspections, incoming sample testing, customer acceptance, and laboratory capability development.

I. What changes does the new national standard GB/T 14599—2025 for high-purity oxygen introduce?

According to GB/T 14599—2025 “Pure Oxygen, High-Purity Oxygen, and Ultra-Pure Oxygen” of the content, the new version of the standard compared to GB/T 14599—2008, the main technical changes include:

• The scope of application for pure oxygen, high-purity oxygen, and ultrapure oxygen has been revised.
• The technical requirements for pure oxygen, high-purity oxygen, and ultra‑pure oxygen have been revised.
• Sampling requirements have been added;
• The purity calculation method has been revised.
• The methods for determining the contents of argon, nitrogen, and carbon dioxide have been revised.
• A method for determining hydrogen content has been added;
• The method for determining total hydrocarbon content has been revised.
• The method for determining moisture content has been revised.
• Emission control requirements have been added;
• The inspection rules have been revised;
• The logo, packaging, and transportation and storage requirements have been revised.
• Safety information requirements have been added.

This means that high-purity oxygen analysis is no longer limited to simply assessing oxygen purity; it places greater emphasis on the accurate determination of trace impurities, stable and reproducible results, reliable sampling, and comprehensive safety management throughout the entire analytical process.

II. What impurities should be given particular attention in high-purity oxygen analysis?

Combine In light of the technical changes introduced in GB/T 14599—2025 and the growing demand for quality control of high-purity oxygen, the analysis of high-purity and ultrapure oxygen typically places particular emphasis on the following impurity parameters:

Test Items	Reason for Following
H₂	The new version of the standard introduces a method for determining hydrogen content; hydrogen is a reducing impurity that must be closely controlled in high-purity oxygen.
Ar	One of the common inert impurities in air‑separation oxygen or high‑purity oxygen, which affects purity assessment.
N₂	It is easily introduced during air separation, filling, or when piping leaks or purging is inadequate.
CO	It reflects trace reductive impurity contamination during the manufacturing process, which significantly impacts high-end oxygen‑use applications.
Carbon dioxide	Reflects the level of impurity control during preparation, purification, storage, transportation, and filling.
Total hydrocarbons, expressed as methane	Assessing hydrocarbon contamination and residual organic impurities is a critical parameter in the quality control of high-purity gases.
H₂O	Common critical control parameters in high-purity gases are particularly important for the analysis of ultrapure oxygen.

For applications involving high-purity and ultrapure oxygen—particularly in the electronics, semiconductor, precision manufacturing, medical, and research sectors—the impurity levels often need to reach With ppb-level detection capability, the instrument system must feature a high-sensitivity detector, multi-valve, multi-column separation, and stable gas‑path control.

III. Core Chromatography Comprehensive Solution for High-Purity Oxygen Detection

Targeting For the testing requirements of the new national standard GB/T 14599—2025 for high-purity oxygen, Corei Chromatography recommends adopting… “Multi-detector, multi-valve, multi-column, and project-specific optimization” Configuration approach. High-purity oxygen detection can be divided into two core analytical configurations:

Plan	Test subject	Recommended Configuration	Scheme Features
Configuration One	H₂, Ar, N₂, CO, CO₂	KR-LGS 2032 L Host +PDHID detector + 5 valves, 6 columns	Suitable for high-sensitivity trace inorganic impurity analysis.
Configuration Two	Total hydrocarbons, expressed as methane	KR-LGS 2032 L Host +FID detector+ 2 Valve 2 column	Suitable for trace-level total hydrocarbon analysis

This plan is based on KR-LGS 2032 Series Gas Chromatograph Based on a core platform, the system achieves the separation and detection of critical impurity components in high-purity oxygen by employing various valve configurations, chromatographic columns, and detectors.

IV. Core Chromatography Introduction to the KR-LGS 2032 Series Gas Chromatography Analysis Platform

In In the GB/T 14599—2025 standard for high-purity oxygen analysis, the stability of the instrument platform, the detector’s configuration capabilities, the valve‑column system’s scalability, the gas‑path control performance, and the capability to detect trace constituents all directly affect the analytical results for parameters such as H₂, Ar, N₂, CO, CO₂, and total hydrocarbons.

Launched by Liaoning Kerui Chromatography Technology Co., Ltd. KR-LGS 2032 Series Benchtop Gas Chromatography Analysis Platform Designed for precision laboratory analysis, offline sample testing, high-purity gas analysis, electronic-grade gas analysis, and the detection of complex industrial gases, it is suitable for analyzing high-purity oxygen, ultrapure oxygen, high-purity hydrogen, electronic-grade gases, industrial gases, standard gases, and multi-component gas samples.

The KR-LGS 2032 series features a desktop‑integrated chassis, offering intuitive operation, easy maintenance, robust expandability, and stable performance. To meet the requirements of the new national standard for high‑purity oxygen testing, this platform can be flexibly configured. PDHID, FID, TCD, FPD, ZD and various detectors, combined with a multi-valve, multi-column system, to achieve analysis from major components to Wide-range analysis of trace impurities at the ppb level.

1. Multi-detector configuration, covering the analysis of critical impurities in high-purity oxygen.

The KR-LGS 2032 series can be optionally equipped with a variety of detectors, including TCD, FID, PDHID, ZD, and FPD, and can accommodate up to … simultaneously. 3 A type of detector. For high-purity oxygen detection:

• PDHID detector : Suitable Detection of trace inorganic impurities such as H₂, Ar, N₂, CO, and CO₂;
• FID detector : Suitable for total hydrocarbons, with detection expressed as methane;
• Additional detectors can be added based on the laboratory’s testing requirements, enabling comprehensive multi‑parameter analysis.

2. Multi-valve, multi-column system, suitable for the separation of complex gas mixtures.

In high-purity oxygen samples, the target impurities are present at very low concentrations, and the properties of the various impurity species differ significantly; consequently, a single chromatographic column or a single detector often cannot adequately address all analytes. The KR-LGS 2032 series supports multi-valve, multi-column configurations and can be used for component switching, heart-cutting, purge‑back protection, and multi‑column coupling in complex gas samples.

In the common detection of high-purity oxygen, For parameters such as H₂, Ar, N₂, CO, CO₂, and total hydrocarbons, a multi-valve, multi-column system helps to:

• Enhance the separation efficiency of different impurity components;
• Reduce the impact of the primary oxygen component on the detection system;
• Improve peak shape and retention time stability for trace components;
• Supports the collaborative operation of multiple detectors;
• Enhance the reliability and reproducibility of high-purity oxygen measurement data.

3. Precision temperature control ensures retention time and quantitative stability.

The KR‑LGS 2032 series features stable column oven temperature control, meeting the stringent requirements of trace analysis of high-purity gases for retention time stability and quantitative reproducibility. This robust temperature‑control system delivers superior peak shapes, excellent repeatability, and long-term operational stability, making it particularly well suited for batch analysis of high‑purity oxygen and routine quality‑control applications.

4. Flexible gas‑path control, balancing stability with operating costs.

The KR‑LGS 2032 series supports fully digital electronic pressure control (EPC) and can also be configured to operate in mechanical valve‑based gas‑path control mode, depending on laboratory requirements. A stable, pure, and continuous supply of carrier gas is essential for trace analysis of high‑purity oxygen. The platform‑based gas‑path design enhances instrument operational stability and reduces routine analytical costs.

5. Intelligent Data Processing and Remote Management

The KR-LGS 2032 series supports networked data management and enables remote monitoring over LANs and the Internet via an Ethernet communication interface. The system can acquire signals from multiple detectors, facilitating centralized data management in laboratory settings. The workstation allows direct configuration of instrument parameters—including column temperature, flow rate, detector temperature, and temperature programming—enabling unified control of the instrument and integrated data acquisition.

For laboratories that conduct long-term, high-purity oxygen factory‑outgoing inspections, batch testing, and customer acceptance tests, this feature helps improve testing efficiency and data traceability.

V. Configuration 1: High-sensitivity trace analysis of H₂, Ar, N₂, CO, and CO₂

In high-purity oxygen The concentrations of components such as H₂, Ar, N₂, CO, and CO₂ are low, and the analysis places stringent demands on separation performance, detector sensitivity, and system cleanliness. Corei Chromatography recommends the following configuration:

KR-LGS 2032 L Host +PDHID detector + 5 valves, 6 columns

This configuration is suitable for high-purity oxygen. High-sensitivity analysis of trace inorganic impurities such as H₂, Ar, N₂, CO, and CO₂. The PDHID detector features high sensitivity, a broad response range, and suitability for analyzing permanent gases and trace impurities, making it well suited for applications involving high-purity oxygen, ultra‑pure oxygen, and other high‑purity gas analyses.

Limit of detection Data

Component	Limit of detection ( 3x signal-to-noise ratio )
H₂	3.3  ppb
Carbon dioxide	2  ppb
Ar	11.9  ppb
CO	15.6  ppb
N₂	6.6  ppb

As can be seen from the experimental data, this configuration is effective for… Key impurities such as H₂, CO₂, Ar, CO, and N₂ can all be detected at the ppb level, thereby meeting the requirements for trace‑impurity analysis under the newly implemented national standard for high‑purity oxygen.

VI. Configuration 2: Total Hydrocarbons, expressed as methane

Total hydrocarbons are a critical parameter for assessing hydrocarbon contamination and residual organic impurities in high-purity oxygen. In applications involving electronic-grade, industrial-grade high-purity oxygen, and ultrapure oxygen, controlling total hydrocarbon levels directly impacts product grade, operational safety, and process stability.

Korei Chromatography recommends the following configuration:

KR-LGS 2032 L Host +FID detector+ 2 Valve 2 column

The FID detector exhibits sensitive and stable responses to hydrocarbon compounds, making it well suited for the detection of total hydrocarbons. By… 2 Valve 2 The column system enables the efficient separation and quantitative analysis of total hydrocarbons in high-purity oxygen samples.

Limit of detection Data

Component	Limit of detection ( 3x signal-to-noise ratio )
Total hydrocarbons, expressed as methane	21  ppb

 

VII. System Repeatability Performance

High-purity oxygen detection not only requires a low detection limit but also demands excellent reproducibility of the measurement results. Corey Chromatography The repeatability of the high-purity oxygen detection system is as follows:

Project	Repeatability
Qualitative repeatability	RSD≤1.5%
Quantitative repeatability	RSD≤3%

Stable repeatability facilitates batch sample analysis, long-term quality monitoring, and traceability of test results, while also enabling laboratories to establish standardized testing procedures that meet the new national standard for high-purity oxygen regarding the stability of quality control.

8. Why is a multi-valve, multi-column system required for high-purity oxygen analysis?

High-purity oxygen samples are characterized by a high content of the main component, low levels of impurities, and distinct differences in the properties of the target components. When only a single chromatographic column or a single detector is used, issues such as insufficient separation, interference from the main component, and inadequate detection sensitivity are likely to arise.

The value of a multi-valve, multi-column system in high-purity oxygen analysis is primarily reflected in:

1. Achieve Effective switching and separation of various components, including H₂, Ar, N₂, CO, CO₂, and total hydrocarbons;
2. Reduce the impact of the primary oxygen component on the detector and the chromatographic column system.
3. Enhance the separation efficiency of trace permanent gases and inorganic impurities;
4. Support PDHID, FID, and other detectors operate in concert;
5. Enhance the stability and accuracy of analyzing complex, high-purity gas samples.
6. It helps meet the long-term quality-control requirements of high-purity and ultrapure oxygen laboratories.

Adopted by Core Chromatography 5 valves, 6 columns and 2 Valve 2 column The configuration is specifically designed to address the separation characteristics of various impurity components in high-purity oxygen, thereby enhancing detection efficiency and data reliability.

Nine Who is this solution suitable for?

Liaoning Kerui Chromatography GB/T 14599—2025 High-Purity Oxygen Testing Solution is applicable to:

Customer Type	Typical Requirements
High-purity oxygen production enterprise	Factory inspection, batch quality control, product grading
Gas company	High-purity oxygen filling, sales, and customer acceptance
Third-party testing agency	Establish testing capabilities that meet the requirements of the new national standard for high-purity oxygen.
Electronic specialty gas user	Incoming inspection of high-purity oxygen and impurity control
Medical and industrial oxygen enterprises	Product Quality Verification and Safety Compliance Testing
Research institutes and university laboratories	Quality Verification of High-Purity Oxygen for Experimental Use
Equipment integrator	Complementary testing for air separation, purification, and filling systems

X. Conclusion

The promulgation and implementation of GB/T 14599—2025 will drive the transition of purity‑based testing for pure oxygen, high‑purity oxygen, and ultrapure oxygen—from conventional purity assessments to more refined control of trace impurities and comprehensive quality management throughout the entire process. For manufacturers of high‑purity oxygen, gas suppliers, third‑party testing laboratories, and end‑use facilities with demanding oxygen requirements, proactively establishing testing capabilities that comply with the new national standard will help enhance product quality, meet customer acceptance criteria, and strengthen market competitiveness.

Liaoning Kerui Chromatography Technology Co., Ltd. is based on KR-LGS 2032 Series Gas Chromatography Analysis Platform , combined with PDHID, FID, multi-valve multi-column system , can be GB/T 14599—2025, the new national standard for high-purity oxygen, offers systematic solutions and instrument configuration recommendations, covering key impurity parameters such as H₂, Ar, N₂, CO, CO₂, and total hydrocarbons, thereby providing reliable technical support for quality control of high-purity oxygen.