Ethylene oxide residual gas chromatograph

The ethylene oxide residue gas chromatograph is a specialized instrument used to detect residual ethylene oxide in medical products and devices. Based on gas chromatography technology, this instrument features high precision, high sensitivity, and ease of operation, making it an important testing instrument for the sterilization quality control of medical devices.

Application

Ethylene oxide (EO) is a commonly used sterilizing agent for medical devices. It is characterized by its strong penetrating power and good sterilization effect, and is widely used for the disinfection of supplies. However, ethylene oxide itself is a toxic gas. If the ethylene oxide gas cannot be fully volatilized after sterilization, residual toxicity can reach a certain level and pose a health hazard.

Standards

GB/T 17623- 1998: Determination of componental contents of gases dissolved in insulating oil by gas chromatography method

DL/T 722- 2000: Guide to the analysis and the diagnosis of gases dissolved in transformer oil

GB7252- 2001: Guide to the analysis and the diagnosis of gases dissolved in transformer oil

Feature

1. Large screen with both Chinese and English display, simple and clear screen switching, stylish and beautiful appearance.

2. Rear-opening "intelligent door controller" technology.

3. Comprehensive self-diagnostic function, allowing for easy inspection of fault location and type.

4. Comprehensive overheat protection and platinum wire resistance open/short circuit alarm functions to ensure temperature control.

5. Optional built-in AD conversion circuit for direct digital signal output.

6. Reverse control function can be implemented according to user needs; all parameter settings and analysis can be completed on a PC.

7. Can operate at negative temperatures under dry ice or liquid nitrogen conditions, supporting a wide temperature range of -80℃ to 450℃.

8. Column box control accuracy up to ±0.01℃ within 180℃.

9. Can simultaneously install two packed columns and one capillary column, or two sets of capillary columns simultaneously.

10. Can achieve simultaneous operation of dual thermal conductivity, dual FID, or thermal conductivity and hydrogen flame.

11. Can simultaneously install three detectors and a methane conversion furnace.

12. Features automatic sample acquisition.

13. The instrument has automatic power-off protection in case of gas interruption.

14. Six-channel temperature control, eight-stage programmed temperature rise, independent temperature control for capillary and packed column vaporization chambers, intelligent double rear door opening.

15. The instrument uses a 5.7-inch color screen display, which can be upgraded to display two spectra simultaneously as needed; it has an automatic flow display function.

16. Can be used with external equipment such as headspace samplers, thermal desorption instruments, liquid autosamplers, and gas autosampler valves.

17. Features automatic ignition function.

Parameters

Test Procedures

1. Prepare six standard solutions of ethylene oxide to six different concentrations using an appropriate amount of standard standard. Take 10 ml of each solution and prepare six standard samples of different concentrations.

2. When the standard samples reach gas-liquid equilibrium, different liquid concentrations correspond to different gas concentrations. Take the gas after equilibrium and inject it into the syringe, recording the peak height (or area) of ethylene oxide.

3. Based on the peak heights (or areas) corresponding to the standard solutions of different concentrations, plot the peak height (or area) - concentration = 1.5. Calculate the residual ethylene oxide content using the formula.