In precision analysis scenarios such as gas chromatography (GC) and liquid chromatography-mass spectrometry (LC-MS), hydrogen is used as the combustion gas, carrier gas, or exhaust treatment gas for FID, and air is used as the auxiliary gas. The stability, purity, and safety of its supply directly affect the detection limit, reproducibility, and service life of the instrument. The online chromatography dedicated hydrogen air integrated machine integrates hydrogen production, air purification, and intelligent control modules to achieve on-demand supply of "laboratory grade" high-purity gases, becoming a crucial gas assurance equipment for modern analytical laboratories.

　　1、 Core function: Accurately match the gas requirements for chromatography

1. Hydrogen supply module

Using proton exchange membrane (PEM) electrolysis technology, pure water is used as raw material to generate high-purity hydrogen gas (over 99.999%) in real time under the action of direct current. The flow range covers 50-500mL/min, which can accurately match the detector requirements of different types of chromatographs.

2. Air purification module

Through four stages of treatment including oil-free compressor, freeze dryer, activated carbon adsorption tower, and 0.01 μ m precision filter, oil, moisture, and particulate matter in the air are removed, resulting in clean air output and eliminating detector signal drift caused by impurities in the combustion gas. A comparative test conducted by a third-party testing agency showed that after using this module, the repeatability of chromatographic peak area increased from 3.2% to 0.8%.

　　2、 Technical advantages: integration of safety, efficiency, and intelligence

1. Inherent safety design

In response to the flammable nature of hydrogen, the all-in-one machine adopts explosion-proof electrical components, hydrogen leakage sensors, and an automatic shut-off valve linkage system. When a leakage concentration of ≥ 1% LEL is detected, the power is cut off within 0.3 seconds and the nitrogen purging program is started. At the same time, alarm information is pushed to the administrator's mobile phone through the Internet of Things platform.

2. Energy saving and consumption reducing mode

The built-in AI algorithm learns the working cycle of the chromatograph and automatically reduces the gas production to the maintenance pressure threshold during standby mode, saving more than 40% energy compared to traditional continuous operation mode. According to statistics from a university laboratory, a single device can save over 2000 yuan in electricity costs annually, while reducing electrolytic cell losses by 30%.

3. Modular maintenance system

The core components such as PEM electrolysis cell and air filter adopt a quick plug design, and maintenance personnel can replace them without professional training. The single maintenance time is shortened from 2 hours to 15 minutes, and the comprehensive utilization rate of the equipment is increased to 98%.

　　3、 Application value: Full scene coverage from laboratory to production line

In the petrochemical industry, a certain refinery has deployed 10 integrated machines for networked operation, achieving centralized supply of gas chromatography equipment throughout the plant, reducing the risk of steel cylinder transportation accidents by 5 times annually, and reducing gas costs by 55%; In the pharmaceutical field, a certain enterprise successfully passed the FDA audit by integrating the all-in-one machine with the QbD system to control the RSD value between dissolution detection batches from 2.5% to within 1.2%.

With the development of analytical instruments towards miniaturization and high-throughput, online chromatography dedicated hydrogen air integrated machines are evolving towards higher purity, lower power consumption, and greater intelligence, continuously providing "zero interference" gas support for precise analysis.