Objective To establish an optimal method for thedetermination of available copper, iron, manganese and zinc in soil inSanpu. Methods AB-DTPA leaching and inductively coupled plasmaspectrometry were used to determine the available $\mathrm{{Cu}},\mathrm{{Fe}},\mathrm{{Mn}}$ and $\mathrm{{Zn}}$ in soilsimultaneously. Results The detection limit and precision met theanalysis requirements, and the high accuracy of copper, iron andmanganese were in the concentration range of ${0.50}\sim {100}\mathrm{{mg}}/\mathrm{L}$ ,and zinc was in the concentration range of ${0.25}\sim {10.0}\mathrm{{mg}}/\mathrm{L}$ .The linear relationship was good, and the correlation coefficients wereall above 0.999 . The detection range of the method was in the range of ${0.06}\sim {0.69}\mathrm{{mg}}/\mathrm{{kg}}$ ,and the blank test results were stable. The precision of the methods wasless than 5.0%, and the parallel differences of the samples were allwithin the qualified range. The available iron, manganese and copper,zinc in the sample are different by one to two orders of magnitude, andthe determination can still obtain accurate results. Conclusion Thedetection limit and precision of this method meet the requirements ofanalysis, and the accuracy is high, which is suitable for the detectionof available copper, iron, manganese and zinc in soil.

With the rapid development of China's automobile industry, vehicle engineering talents are in great demand. College vehicle engineering laboratory is an important place for vehicle engineering specialty to carry out basic and critical education and teaching work, so it is increasingly important to improve the construction level of vehicle engineering specialty laboratory. At present, equipment maintenance and management measures are not in place in vehicle engineering laboratories, which leads to high failure rate and low utilization rate of laboratory equipment. Based on the analysis of equipment failure in the laboratory of vehicle engineering specialty, this paper puts forward the strategy of periodic maintenance, equipment maintenance and management measures such as preventive maintenance strategies, building equipment management systems, and improving use specifications provide ideas for further improving the construction level of vehicle engineering professional laboratories.

Information management is an inevitable trend in the management of monitoring laboratories, more and more environmental monitoring institutions are starting to build LIMS, promote the development of environmental monitoring towards automation, standardization, and effectiveness. Analyses the current status of LIMS construction in various industries in China, taking Chongqing ecological environment monitoring business management system as an example, propose the design of system functional, summarize the experience of successful system implementation, provide references measures for vertical management of environmental monitoring institutions.

Objective To study the bacteriological test method ofsputum samples and the effect of clinical infection. Methods A total of240 samples were collected from May 2019 to May 2020. After the twogroups, the conventional test samples were collected by sputum culture,and the test sample was improved by bacteriology and sputum culture,comparing the sample quality and test results. Results According to thecomparison analysis, the sample quality, disease detection rate andstrain positive rate of the study group were ideal, and the group weredominant $\left({P<{0.05}}\right)$ . Conclusion The implementation ofbacteriological test of sputum specimens can accurately detect patients,and the proportion of clinical infection is ideal, so it has goodimplementation effect and clinical application value.

In modern society, food and drug safety is a major issue related to public health and social stability. With the progress of science and technology, the application of information technology in food and drug inspection and testing has become the key to improve the efficiency and accuracy of testing. This paper aims to discuss the specific application and role of information technology in food and drug inspection and testing. From automated detection to advanced data analysis, from remote monitoring to the application of blockchain technology, information technology is gradually changing the face of food and drug inspection and testing, providing strong technical support to ensure product quality and public health and safety. Through comprehensive analysis of these technologies, this article aims to provide reference and guidance for the research and practice of informationization in the field of food and drug testing.

Objective To develop a scientific method for identifyingsea sand to differentiate it from river sand. Methods Qualitative andquantitative analysis of sea sand is conducted through its sensorycharacteristics, microscopic features, chemical and physical properties,and volumetric measurement methods. Results The chemical analysis showsthat sea sand is different from river sand with high chloride content(≥0.01%) and high shell content (≥0.1%). The electrical conductivity ofsea sand is significantly higher than that of river sand. In terms ofquantitative analysis, the relative deviation of the sea sand weightcalculation method proposed in this study is ${0.25}\%\sim {0.87}\%$ , which is close tothe allowable error of $\pm {0.3}\%$ of the truck scale. Conclusion The identification method proposed inthis study can quickly and effectively distinguish sea sand, which is ofgreat significance in ensuring the safety of building materials.

Objective To understand the water quality and health status of swimming pools in Banan District of Chongqing, and to provide scientific basis for further strengthening the health management of swimming places, so as to ensure the health of swimming enthusiasts. Methods The total bacterial count and coliform microbial index of swimming pool water in Banan District of Chongqing were monitored. Results A total of 384 swimming pool water samples were monitored in Banan District of Chongqing from 2018 to 2022, and the overall qualified rate was ${97.12}\%$, the lowest qualified rate was ${90.70}\%$ in 2020, and there was no significant difference in 5-year qualified rate $\left({{\chi }^{2}= {6.395}, P >{0.05}}\right)$. There was no significant difference in the qualified rate of microbial detection in swimming pool water between different seasons $\left({{\chi }^{2}= {4.899}}\right.$, $P >{0.05})$. There was significant difference in the qualified rate of microorganism monitoring in swimming pool water of different types of swimming pool venues $\left({{\chi }^{2}= {17.361}, P <{0.01}}\right)$. Conclusion The microbial detection of swimming pool water in Banan District of Chongqing from 2018 to 2022 is generally good, but there are still some unqualified samples. It is necessary to strengthen the supervision and management of microorganism detection in swimming pool water and relevant technical guidance.

With the rapid development of information technology and the deepening implementation of digital transformation, digital management has been applied to various fields and industries. To meet the quality requirements regardless of improvement, third-party inspection and testing institutions are constantly trying innovative digital management methods to improve the efficiency and accuracy of their equipment management and monitoring. This paper deeply discussed the current situation and existing problems of equipment management in third-party inspection and testing institutions, and proposed feasibility analysis and application scenarios for the intelligent management and application of equipment numbers in third-party inspection and testing institutions. This paper improved the efficiency of equipment management by automating intelligent equipment and implementing data monitoring, and integrated and analyzed equipment data by using data intelligent management to provide data support for accurate decision-making.

With the development of higher education and the improvement of scientific research level, university laboratories have become an important place for cultivating talents and conducting scientific research. The cross-integration of discipline development puts forward higher requirements for the construction of laboratory safety education system. Therefore, it is very important to establish a perfect laboratory safety education system in colleges and universities. This paper focuses on the construction and practice of laboratory safety education system in colleges and universities, and constructs a standardized safety education system from eight elements: educational objectives, educational models, educational objects, teaching staff, educational content, educational methods, assessment and conditions guarantee. Through the system construction and practice, it aims to improve the safety awareness and coping ability of laboratory personnel, reduce the incidence of safety accidents and provide a strong guarantee for the safe operation of university laboratories.

Surface water is an indispensable and important resource in human life and production. However, the existence of trace metal elements in surface water poses a potential threat to the safety of water quality. Therefore, it is important to perform accurate and rapid monitoring of trace metal elements in surface water. This article reviews the application of ICP-MS in monitoring trace metal elements in surface water, analyzes the challenges and countermeasures in its application process, and provides accurate data reference for the comprehensive development of surface water protection work. Reference for the comprehensive development of surface water protection work.