The gas chromatograph uses gas as the mobile phase, and the sample to be measured is brought into the column by the carrier gas after gasification in the gasification chamber, and the components are separated in the column and detected by the detector. The baseline is the comprehensive performance of the performance of the gas chromatograph in operation, and the failure of each part of the instrument, the change of operating conditions and external conditions and other factors will be reflected on the baseline, so the cause and location of the fault can be judged according to the baseline.

Objective To investigate the content of pesticide residues and exogenous heavy metal pollutants in 10 commonly used Chinese crude drugs (Morindae officinalis radix; Citri grandis exocarpium; Polygoni multiflori radix; Amomi Fructus; Pogostemonis Herba; Baphicacanthis Cusiae Rhizoma et Radix; Radix Kadsurae Coccineae; Bruceae Fructus; Arecae Semen; Alpiniae Oxyphyllae Fructus) from 200 batches from different regions in Lingnan, in order to provide a basis for quality control of southern medicine. Methods The content of the exogenous pollutants such as heavy metals, harmful elements, pesticides in 10 commonly used Chinese crude drugs was measured according to Pharmacopoeia of The People's Republic of China (2020 edition)(hereinafter referred to as Chinese Pharmacopoeia), in order to determine and analyze the measurement results. Result The pesticide residues and limits of lead, arsenic, cadmium, mercury, and copper in Polygoni multiflori radix, Baphicacanthis Cusiae Rhizoma et Radix, Radix Kadsurae Coccineae, Arecae Semen and Alpiniae Oxyphyllae Fructus all meet the requirement of the Chinese Pharmacopoeia. Morindae officinalis radix, Citri grandis exocarpium, and Amomi Fructus all have heavy metal non-compliance, while Pogostemonis Herba has pesticide residue non-compliance. Conclusion For the studied varieties, pesticide residue control is good, and it is necessary to focus on monitoring lead and mercury elements.

Objective To improve temperature check technology for resistance to thermal shock of ceramic cookware products and to enhance the work efficiency. Methods By using different temperature testing tools of infrared thermometer and compact spot finder infrared camera to test resistance to thermal shock of samples, and the experimental steps and results were compared and analyzed. Results For infrared thermometer, manual handheld operation is required to detect the bottom temperature of a sample, which has low safety and poor detection repeatability; For the compact spot finder infrared camera, it can be connected to a computer for automation to detect temperature of sample, which can achieve the temperature visualization, easy to operate, more safety and reliable. Conclusion The experimental data shows that the compact spot finder infrared camera provides safe and reliable technical support for the detection of resistance to thermal shock of ceramic cookware. This experiment provides technical guidance for improving the quality of ceramic cookware products.

College pharmacy teaching laboratory is an important place to train pharmaceutical technology practical talents, involving many disciplines, equipment and chemicals, which will bring a large number of unsafe factors, and a little carelessness will cause personal, property and environmental safety accidents. Therefore, safety management should be strengthened. Based on the practice of laboratory safety management, this paper analyzes the current situation and problems of safety management, and believes that it can be improved from the aspects of safety system, safety education, hardware construction and targeted management of each laboratory, so as to effectively improve the safe operation of the laboratory.

The types and characteristics of hazards in university environmental laboratories are diverse, and the risk classification and prevention network barrier construction of hazards have a significant promoting effect on the management of hazards in university laboratories. The article adopts the method of system engineering to classify and statistically analyze the hazards in environmental laboratories; Based on the theory of accident risk chain, multi-level comprehensive evaluation method, and Murphy's law, a risk classification index system and prevention network barrier for environmental laboratory hazards have been constructed. The results indicate that: (1) The hazards in the laboratory are divided into two levels: risk factors and risk units. The risks of risk factors and risk units are divided into five levels: extreme danger, severe danger, significant danger, potential danger, and slightly dangerous. (2) Experimental materials, process equipment, environment, personnel, and safety management constitute the risk chain of experimental accidents. The occurrence of accidents is a chain event, and is greatly reduced by building layers of defense barriers. Building a prevention network barrier based on experimental projects, with division of labor and responsibility among all experimental personnel, interlocking of material, environmental, human and management, grading and precise supervision of hazardous units throughout the entire cycle, in all aspects, is a strong guarantee for laboratory safety.

With the rapid development of information technology, laboratory information management has become a key means to improve research efficiency and quality. This article delves into the application and significant benefits of laboratory information management in data processing, resource utilization, team collaboration, and research innovation. By implementing electronic data management, online resource scheduling, cross regional collaboration platforms, and advanced data analysis, information management not only improves research efficiency, but also promotes the improvement of research quality and innovation capabilities. The further development of information technology will make laboratory management more efficient, secure, and collaborative, providing strong support for scientific research.

Fluorescence probe technology refers to a technical means of labeling the substance to be measured with fluorescence probe, enabling qualitative and quantitative analysis of the measured substance. Fluoride ion is one of the important trace elements in human body, proper intake of fluoride ion can help prevent tooth decay and osteoporosis, while excessive intake of fluoride ion can cause a variety of diseases. Therefore, it is of great significance to develop fluorescence probes that can detect fluoride ions in organisms. The latest scientific research results were converted into comprehensive designing experiment "the synthesis of fluorescence probe and detection of fluorine ions in aqueous phase". Through the implementation of the experiment, the students' ability of organic synthesis, the operation of optical analytical instruments and the analysis of experimental data will be greatly improved.

College electrical and electronic laboratories play a crucial role in conducting fundamental and advanced education and teaching activities. In order to improve the overall safety of electrical and electronic laboratories in colleges and universities, eliminate safety hazards and prevent safety accidents. This paper analyzes and summarizes the common unsafe factors in electrical and electronic laboratories in colleges and universities. These unsafe factors include physical unsafe factors and human unsafe factors. Physical related unsafe factors involve experimental equipment and experimental environment, while human related unsafe factors involve laboratory managers, experimental instructors and students. Based on an analysis of these unsafe factors, this paper puts forward specific measures for electrical and electronic laboratory safety management, including strengthening the safety management of experimental equipment and experimental environment, improving the safety management level of laboratory staff, enhancing the awareness of safety responsibility of experimental instructors, and eliminating unsafe behavior of students. These measures provide a certain security guarantee for the construction and development of electrical and electronic laboratories.

Objective To analyze the impact of microbial detection technology on food inspection results. Method 100 samples of food to be tested from a testing institution between January 2023 and December 2023 were selected as the research subjects, all of which underwent fluorescence PCR and traditional national standard methods. The microbiological testing techniques were observed and recorded in the food inspection results. Result Among the 100 food samples to be tested, 52 were fruits, 34 were vegetables, and 14 were meat. Among the 10 food samples sampled, 4 were Escherichia coli, followed by 3 Staphylococcus aureus and 2 were Salmonella. According to the traditional national standard method, 4 were Escherichia coli, and 3 were Salmonella and Staphylococcus aureus; Among the 100 food samples from 3 categories, the highest contamination rates were found in raw animal meat, raw poultry meat, and aquatic products. A total of 17 samples were contaminated, and the most pathogenic bacteria detected were Escherichia coli, Staphylococcus aureus, and Salmonella. Conclusion Microbial detection technology can detect pathogenic microorganisms in food, distinguish specific types, and has good application value.

In order to better achieve the population health goals in the 14th Five-Year Plan, the information system of the centers for Disease Control and prevention at all levels from the national to the local level is constantly upgraded and improved, and the continuous improvement of information technology and the sharing of various types of data will promote the integration and application of emerging technologies, thus accelerating the development of information technology in the centers for disease control and prevention to intelligence. This paper explored the development path from digitization to intelligence in the information construction of disease prevention and control institutions (abbreviated as a disease control institution), analyzed the existing digitization and intelligent application of disease control institution, and provided solutions for the high-quality intelligent transformation of disease control institution; put forward that the information construction and development of disease control institution should be guided by the combination of digital innovation technology and expert experience, seized the current technological development opportunities, gave full play to their own professional and technical advantages, focused on improving their own technological transformation strength, uphold the characteristics of disease control, made up for functional defects, and achieve high-quality development of public health.