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.

Laser surface acoustic wave technology is an emerging non-destructive testing method that exhibits unique advantages in surface damage assessment during material processing. This article focuses on the application of this technology in the quantitative characterization of surface cracks, roughness, and thermal damage. High sensitivity and strong quantification ability for damage detection have been achieved through laser excitation of surface waves and analysis of their propagation characteristics. Optimizing the incentive reception scheme and signal processing algorithm can further improve detection performance. Experimental studies have shown that there is a deterministic correlation between the time-frequency domain characteristic parameters of surface waves and the damage dimension, laying the foundation for engineering applications.

Safety is the basic guarantee for university laboratories to carry out teaching and research. The dual prevention mechanism with risk classification control and hidden danger investigation and management as the core can effectively curb the occurrence of laboratory safety accidents. This paper describes the four stages of building a dual prevention mechanism, and uses the operating condition risk assessment method (LEC) to evaluate and grade laboratory risks, moving the threshold of laboratory risk management and control to the risk point classification management and control, and building a solid laboratory safety defense line.

Objective The article studies the determination of ${\mathrm{{COD}}}_{\mathrm{{Mn}}}$ and ${\mathrm{{COD}}}_{\mathrm{{Cr}}}$ inwater using microwave digestion spectrophotometry. Methods Explore thisdetection method from multiple perspectives such as detection limit,precision, accuracy, linear range, analysis speed, and testing cost, andcompare it with traditional national standard methods. Results Theexperimental results show that the detection results of this method aresimilar to those of the national standard method, with a high recoveryrate of sample spiking, a lower detection limit, and a lower relativestandard deviation. Conclusion It can be seen that the method is easy and fast to operate, with good detection accuracy, high precision, wide detection range, and reduces time and material costs, reducing secondary pollution. It is suitable for the detection of different types of water bodies such as surface water, groundwater, and sewage.

Objective To optimize the detection method and explore thedetection method with stable strength data and small relative standarddeviation of Curdlan. Method Using Curdlan as the material, compare theglue making methods, optimize the sampling amount, heating temperature,ice water bath cooling time, and parallel measurement times based onsingle factor experiments, and analyze the optimal combination of eachfactor condition through orthogonal experiments. Result The determineddetection method is to take a sample of ${0.30}- {0.31}\mathrm{\;g}$ , add ${15}\mathrm{\;{mL}}$ of freshly prepareddegassed water, stir with a trace sampling spoon to evenly disperse thesuspension, heat in a boiling water bath and maintain its uniformity,heat in a water bath for 10 minutes, then remove and cool in an icewater bath for 50 minutes, and conduct three parallel experiments. Conclusion This method has a small relative standard deviation andstable data. The column heads with diameters of ${0.4}\mathrm{\;{cm}},{0.5}\mathrm{\;{cm}}$ and ${0.6}\mathrm{\;{cm}}$ forproducts with gel strength greater than ${600}\mathrm{\;g}\cdot {\mathrm{{cm}}}^{-2}$ can be used for determination.

This paper investigates the development direction, scale and new material inspection and testing ability of Chongqing's material industry, analyzes the current situation and existing problems of the new material inspection and testing industry, and puts forward the development path of focusing on the differentiated development of the testing industry and building a perfect testing public service sharing platform.

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 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.

Colleges and universities incorporate the evaluation system into the laboratory safety management, which is very important for carrying out the laboratory safety management works effectively. It is not only meets the objective requirements of the state, but also is contribute to guide teachers and students to establish correct safety awareness and create great laboratory safety culture atmosphere. Based on the college safety requirements of the Ministry of Education, we could create an open, fair and equitable evaluation contents and selection process on the laboratory safety, and set up awards and rewards foe excellent laboratories. In this way to arouse the enthusiasm of teachers and students for the laboratory safety works, and gradually form laboratory safety culture.

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.