AIM: To dissociate and determine the chemical components of volatile oil from Salsola col-lina Pall.in Shandong Province METHODS: The chemical components of volatile oil were analyzed by gaschromatography-massspectraphy(GC/MS). RESULTS: Fifty-nine constituents were identified,which accounted for 87.63% of volatile oil,the major chemical componets in the volatile oil were terpenes and terpene ramifications. CONCLUSION: This method is reliable,stable and repeatable.the data can provide resources for expolitation of Salsola col-lina Pall.

Objective Nowadays, radioactive xenon isotopes, including ^131mXe, ^133mXe, ¹³³Xe, and ¹³⁵Xe, are primarily released into the atmosphere through various reactor operation and major accidents of reactors. To improve the online monitoring capability of xenon in nuclear facilities and their gaseous effluents, a highly sensitive online xenon monitoring system was developed to monitor, warn, and alarm the activity concentration of radioactive xenon. Methods The online monitoring system for radioactive xenon gas in nuclear facilities was established using xenon membrane separation and concentration, xenon high-efficiency selective adsorption, and low-background gamma-ray spectrometry analysis methods. Results Under the operation mode of one-hour sampling and one-hour measuring, the minimum detectable activity concentration of the radioactive xenon online monitoring system for ¹³³Xe was approximately (1.43 ± 0.03) Bq/m³. Conclusion This system can be effectively used for online monitoring of xenon activity concentration in nuclear facilities such as nuclear power plants and isotope production reactors, as well as in gaseous effluents. It helps improve the safety level of personnel, the environment, and nuclear facilities.