Objective Clarify and optimize the detection methods for 9antioxidants in oil samples. Methods After dissolving the oil sample in $3\mathrm{\;{mL}}$ of n-hexanesolution saturated with acetonitrile, repeat the extraction 5 times with $3\mathrm{\;{mL}}$ of n-hexanesaturated acetonitrile containing AP, and merge the 5 extractionsolutions. Purify with a C18 solid-phase extraction column, collect andconcentrate all extraction and eluent together to ${0.2}\mathrm{\;{mL}}$ , and finally make upto $2\mathrm{\;{mL}}$ withacetonitrile. Results 9 antioxidants linear relationship is good withinthe range of 1.0 to ${60.0}\mathrm{{\mug}}/\mathrm{{mL}}$ , and the correlation coefficients are allgreater than 0.99 ; the recovery rate ranges from 91.2% to 108.8%, witha relative standard deviation (RSD) of 0.6% to 10.0%; the detectionlimit is within the range of ${0.2}\sim {2.0}\mathrm{{mg}}/\mathrm{{kg}}$ ,and the quantitative limit is within the range of ${0.6}\sim {6.0}\mathrm{{mg}}/\mathrm{{kg}}$ . Conclusion This method optimizes the extraction frequency, purification method, and elution volume, and significantly improves the recovery rates of 9 antioxidants. The extraction frequency has a significant impact on the recovery rate of BHT and DG.

Objective Determination of silicon dioxide in fluorite byalkali fusion-molybdenum blue spectrophotometry. Methods The method ismelted with potassium hydroxide, extracted with water and acidified withsulfuric acid, then, in a weak acidic solution, silicic acid andammonium molybdate form soluble yellow silicomolybdic heteropoly acids,to improve acidity, reduce silicomolybdate yellow to silicomolybdateblue by reducing agent, the absorbance was measured at ${700}\mathrm{\;{nm}}$ and the silicondioxide content was measured. A large number of fluoride interference,the addition of aluminum salt to eliminate. Results Determination ofsilicon dioxide in fluorite by alkali fusion-molybdenum bluespectrophotometry, the silicon dioxide has good calibration curvelinearity, the linear regression equation is $\mathrm{Y}= {0.34733}\mathrm{p}+{0.00228}$ , the correlation coefficient was 0.999; the precisionof the method is less than 1.5%, the accuracy was measured with thenational reference materials, and the relative standard deviation (RSD)was less than 2%. Conclusion It was found that the precision andaccuracy of this method for the determination of silicon dioxide influorite samples were satisfactory and met the requirements of relevantstandards.

With the development of social economy and the improvement of living standards, drinking water quality and safety issues have attracted much attention. Therefore, it is necessary for relevant department staff to pay more attention and reasonably apply gas chromatography technology to detect drinking water quality, so as to reduce the adverse effects of drinking water pollution as much as possible. In this case, this article studies and analyzes the application effect of gas chromatography technology in drinking water quality testing, in order to provide valuable reference opinions for relevant staff, protect people's health, and promote the harmonious and stable development of society.

Objective To explore the effectiveness of gas chromatography-mass spectrometry in detecting volatile organic compounds in soil. Methods Gas chromatography-mass spectrometry was used to detect 24 groups of soil samples from a certain factory. Results There are certain differences in the types and concentrations of VOCs in soil from different regions. The soil of this factory contains volatile organic compounds such as benzene series, chlorinated hydrocarbons, and esters, which meet the monitoring requirements for VOCs in soil. Conclusion Experimental results have shown that gas chromatography-mass spectrometry can accurately detect the types, components, and contents of volatile organic compounds in soil, with high accuracy in the detection results. It is worth promoting and applying.

Objective To establish an inductively coupled plasma massspectrometry (ICP-MS) method for the determination of $\mathrm{{Pb}},\mathrm{{As}},\mathrm{{Hg}},\mathrm{{Cd}},\mathrm{{Hg}}$ in astragali radix, crataegi fructus, lycii fructus, lonicerae japonicaeflos and glycyrrhizae radix et rhizome. Methods After microwavedigestion of forty-five batches of samples, the contents of five heavymetals in commom TCM decoction pieces were determinationed by ICP-MS.The RF power is 1550 W. Kinetic Energy Discrimination mode is used. Thecollisional gas was Helium.The carrier gas was Argon with ${0.8}\mathrm{\;L}/\mathrm{{min}}$ , theplasma gas flow rate was ${14.0}\mathrm{\;L}/\mathrm{{min}}$ . Results Five heavy metal elements showed a good linear relationships $\left({r >{0.999}}\right)$ , whoserecoveries were 84.6%~115.3%, the detection limit was ${0.0001}\sim {0.0140}\mathrm{{mg}}/\mathrm{{kg}}$ .Among the 45 batches of samples, there were individual samples oflonicerae japonicae flos that exceeded the limit. Conclusion This methodis simple, efficient, stable and reliable, which can be used for thequality study of a variety of heavy metals, and provides more basis forits quality control and scientific supervision.

This paper aims to discuss the key points of quality control of on-site testing in mine safety inspection laboratory, including the quality and skills of analysts, the management and maintenance of instruments and equipment, the specification of sample management, and the condition control of environmental facilities. Through the implementation of a strict quality control system and the application of highly automated inspection technology, the accuracy and trust of inspection data can be significantly improved. Formulate specific requirements and implementation strategies for laboratory personnel training, instrument maintenance system, sample management process and environmental condition control, so as to comprehensively improve the quality of on-site testing work.

In education and teaching, university laboratories have a dual function of carrying teaching and research, and providing social services. The safety management of university laboratories has also attracted people's attention. Therefore, this article conducts research and analysis on the "6S Management" and "dual prevention mechanism" in the safety management of university laboratories. By focusing on the management of 6S and introducing the "dual prevention mechanism" approach, it can better achieve on-site operations, graded management and control, and safety hazard investigation in university laboratories, thereby avoiding physical injuries to students caused by the use of physical, chemical and other experimental equipment in university laboratory teaching. Based on the research of "6S" and dual prevention mechanism in laboratory safety management, the goal of comprehensively improving laboratory safety management level can be achieved through measures such as optimizing laboratory equipment and establishing effective emergency prevention plans, laying a solid foundation for ensuring the safe operation of university laboratories and protecting personnel and equipment safety.

High school physics laboratory is an important place for science education, but it is also a concentrated point of potential risks. With the increasing complexity of experimental content and the continuous update of experimental instruments, laboratory safety management and risk prevention are particularly important. In recent years, with the emphasis on safety education, how to effectively prevent and deal with experimental accidents has become the focus of attention of school administrators. Based on this, this study systematically combs the current status of laboratory safety management, analyzes existing problems, and puts forward feasible improvement measures, aiming at providing theoretical support and practical guidance for building a safe and standardized experimental teaching environment.

The article conducted a study on the optimization of standardized processes, focusing on the problems in the maintenance and repair of laboratory testing equipment, as well as the shortcomings in the current process. An analysis was conducted on the types, functions, current problems, and challenges faced by laboratory testing equipment. And the necessity of developing standardized maintenance and upkeep processes was proposed, including principles, methods, and design points for optimizing the process. A standardized plan for maintaining laboratory testing equipment, including process construction, time nodes and frequency settings, as well as quality control and acceptance standards, was provided. Through this study, the operational efficiency and stability of laboratory testing equipment can be improved, ensuring the normal operation of various laboratory tasks.

With the rapid development of medical education, medical laboratory plays a crucial role in cultivating medical talents and scientific research innovation. However, due to the complexity and specificity of laboratory management, traditional management methods are no longer able to meet the needs of modern laboratory management. This article aims to explore the application of standardized management measures in the management of medical school laboratories. Through in-depth analysis of the current situation of medical school laboratory management, a series of standardized management measures are proposed to improve the efficiency of laboratory management, ensure the safe and stable operation of laboratories, and provide strong guarantees for medical education and scientific research innovation.