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.

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.

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.

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.

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.

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.

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.

Objective To establish a high-performance liquidchromatography method for the detection of dibenzothiazole disulfide(MBTS) in soil. Methods Extract using acetonitrile ultrasound for 30minutes, filter through an organic membrane filter, and purify through aC18 column. Use an HPLC analyzer with set flow rate of ${0.7}\mathrm{\;{mL}}/\mathrm{{min}}$ andcolumn temperature of ${40}^{\circ }\mathrm{C}$ , and the soilsample is separated for qualitative analysis and quantitative analysisusing external standard method at a detection wavelength of ${275}\mathrm{\;{nm}}$ . Results Byoptimizing the pre-treatment and chromatographic conditions for MBTSdetection, acetonitrile was used as the extraction solvent, C18 columnserves as the purification column. An appropriate gradient elutionprogram has a good effect on reducing matrix effects in soil andanalyzing target compounds. Through methodological validation, it wasfound that, the relative standard deviation of MBTS spiked precisionranges from 0.070% to 0.201%. The relative standard deviation of MBTSspiking accuracy ranges from 0.071% to 0.646%, and the spiking recoveryrate ranges from 91.0% to 97.1%, the detection limit of MBTS method is0.003 mg/kg, and the lower limit of determination is ${0.013}\mathrm{{mg}}/\mathrm{{kg}}$ . Conclusion This method has the advantages of simple operation, lowdetection limit, short testing time, low interference, high precisionand accuracy, and can provide technical support for the MBTS insoil.

Based Perchlorate is a new type of pollutant in drinkingwater, which is harmful to human health. The newly promulgated“Standards for Drinking Water Quality”(GB 5749-2022) has been listed asan expanded indicator. The uncertainty of determination of perchloratein drinking water by ion chromatography was evaluated, and the factorsaffecting the accuracy of the result were determined. On the StandardTest Method for Drinking Water Part 5: Inorganic Nonmetallic Indicators(GB/T 5750.5-2023), the perchlorate in drinking water was measured byion chromatography, and the uncertainty introduced in each step wasanalyzed and calculated. And evaluate its expanded uncertainty. Theperchlorate concentration in drinking water was ${0.101}\mathrm{{mg}}/\mathrm{L}$ and theextended uncertainty was ${0.005}\mathrm{{mg}}/\mathrm{L}\left({k =2}\right)$ . The measurement uncertainty is mainly introducedfrom six aspects, namely, the standard material itself, the preparationof standard working fluids, the preparation of series of standardworking fluids, the determination of sample repeatability, the recoveryrate and the main equipment. The most important factor affecting thetotal uncertainty is the uncertainty introduced in the preparationprocess of standard series working fluids.