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.

Microbial testing is of high importance in grassroots disease control centers. Effective microbial testing can ensure the disease prevention ability of grassroots disease control centers. In order to better implement disease control work, grassroots disease control centers attach great importance to the completion of microbial testing work. However, based on the completion of microbiological testing in some grassroots disease control centers in certain regions, there are still some omissions that have not been rationalized in the implementation process, which has had a certain impact on the application value of microbiological testing. Based on the consideration of the importance of microbiological testing in grassroots disease control centers, this article explores common problems and countermeasures in microbiological testing in grassroots disease control centers, in order to promote the improvement of microbiological testing accuracy. Targeted comprehensive analysis work is carried out from multiple aspects such as grassroots disease control center staff, equipment and instruments, and work environment, in order to achieve precise control and effective handling of related issues.

In the process of investigating ecological and environmental pollution cases, problems such as difficulty in identifying the attributes of unknown solid waste, complex identification processes, and slow identification time have always affected the efficiency of case investigation. Through personnel interviews, on-site investigations, and initial screening of on-site rapid detection equipment, comprehensive analysis is conducted to determine the detection indicators for the hazardous characteristics of unknown solid volatile organic compounds. The leaching toxicity and toxic substance content of volatile organic compounds are analyzed to identify unknown solid waste as hazardous waste. Accurate identification of hazardous characteristics greatly saves emergency inspection time and provides scientific basis for emergency disposal of unknown solid waste, improves case handling efficiency, and has guiding significance for similar ecological environment damage cases. At the same time, this article also studies the toxicity detection method of volatile organic compounds in solid waste.

Socialized environmental monitoring, as one of the important approaches for environmental monitoring in China, directly affects the effectiveness of our country's environmental protection efforts. However, at present, there are many quality issues in the socialized environmental monitoring data in China, which need continuous improvement and refinement. Therefore, this paper conducts an in-depth analysis of the existing data quality problems in the domestic socialized monitoring industry through literature research methods, clarifies the main factors affecting the quality of socialized environmental monitoring data in China, and proposes targeted countermeasures from the perspectives of optimizing management systems, improving personnel quality, and upgrading technical equipment. The research conclusions are of great significance for improving the socialized environmental monitoring system in China and enhancing the overall level of environmental protection in our country.

Objective To analyze the microbial detection results of drinking water in a certain area. Methods 77 water samples submitted for inspection in 2022 (including 60 for agricultural drinking water and 17 for urban drinking water) and 88 water samples submitted for inspection in 2023 (including 74 for agricultural drinking water and 14 for urban drinking water) were studied. The total number of bacterial colonies, total coliforms and thermostable coliforms were detected according to the Standard Inspection Method for Drinking water. Compare the relevant differences. Results (1) The qualified rate of microbial indexes in 2022 and 2023 was 73.94%; In 2022, 77 water samples were collected, and the total number of bacteria, total coliform, heat-resistant coliform and three comprehensive passrates were 62.34%, 58.44%, 58.44%, 58.44%, respectively. The total number of bacteria, total coliform, thermostable coliform and the comprehensive pass rates of 88 water samples in 2023 were 87.50%, 87.50%, 88.63% and 87.50%, respectively. The total qualified rate of agricultural drinking water in 2022 and 2023 is 56.67% and 60.81%. The total qualified rate of urban drinking water in 2022 and 2023 is 94.12% and 92.86%; In 2022 and 2023, the total number of bacteria, total coliform, heat-resistant coliform and three total pass rates of agricultural drinking water and urban drinking water were compared, and the difference was statistically significant (P＜0.05). Conclusion According to the results of sampling inspection, the qualified rate of urban drinking water is still not 100%, the qualified rateof rural drinking water is lower than that of urban drinking water, there are serious water pollution problems, relevant departments should strengthen the supervision of water quality in the future, and actively improve the disinfection work.

Objective In chemical analysis, the focus used to be on theprecision and accuracy of detection results. However, many testingactivities currently require establishing the credibility of theresults. Especially by measuring the credibility of the results to provetheir suitability, this generally includes the degree to which oneoutcome is expected to match other outcomes, which is also thesignificance of exploring uncertainty. Methods According to theCNAS-GL06 Guidelines for Evaluation of Uncertainty in Chemical Analysis,this article detected the content of phosphate ions in a certainindustrial wastewater and studied and analyzed the components thataffect measurement uncertainty during the experimental process. ResultsThrough calculation, it can be concluded that when the result ofphosphate ion is ${3.00}\mathrm{{mg}}/\mathrm{L}$ , theconfidence interval is ${2.86}-{3.14}\mathrm{{mg}}/\mathrm{L}\left({\mathrm{k}= 2}\right)$ . Conclusion The main factor affecting its measurement uncertainty is theuncertainty introduced by the calibration curve fitting. In order tomake the detection results more scientific and accurate, it is necessaryto pay attention to the maintenance and upkeep of the ion chromatographin daily work, minimize the background noise of the instrument, andimprove the sensitivity and accuracy of the instrument.

In order to accurately and efficiently determine the purityof ethyl acetate refined products, the separation was carried outaccording to the programmed heating method based on the analysiscondition of gas chromatograph. The initial temperature was set at ${80}^{\circ }\mathrm{C}$ , and after $4\mathrm{\;{min}}$ , the heating ratestarted at ${20}^{\circ }\mathrm{C}/\mathrm{{min}}$ ,and the termination temperature was ${140}^{\circ }\mathrm{C}$ . The analysisshowed that the separation degree of each peak was greater than 2.0, andthe peak shape was symmetrical, sharp and the baseline was stable.Effective separation is possible. After the quantitative analysis ofarea normalization method, correction factor method and internalstandard curve method, the correction factor method has thecharacteristics of high accuracy, strong stability and economy, and itis more suitable for the determination of ethyl acetate purity than thecorrection factor method.

Objective To analyze coal mine occupational health detection and occupational hazard prevention methods. Method The basic concepts of coal mine occupational health detection were expounded, the main methods and processes of occupational health detection were discussed, and occupational disease prevention and control strategies in technology and management were proposed. Results The incidence of occupational diseases in coal mines can be reduced through the comprehensive application of occupational health detection methods and effective prevention and control measures. Conclusion Coal mine occupational health detection and occupational hazard prevention are of great significance to protect the health of miners and improve the level of coal mine safety production.

Objective Exploring the effect of nicotinamide concentration on skin melanin transfer and its mechanism of action, to provide a scientific basis for the development and application of related skin care products and beauty technology. Methods The mechanism of nicotinamide inhibiting the formation of melanin was elucidated, and the main influencing factors of the formation of black spots were analyzed, so as to control the formation and transfer of melanin. The researchers then combined a variety of substances, including arbutin, phenylresorcinol, and vitamin C and its derivatives, to study. Results Nicotinamide was able to effectively inhibit the diffusion rate of melanin by blocking the transfer process of melanin particles to epidermal cells. When used in combination with arbutin, phenylethyresorcinol and vitamin C, its inhibitory effect is more obvious. Conclusion Niacinamide and its synergistic effect with other substances can effectively inhibit the transfer and diffusion of melanin, providing a new way for skin whitening. This discovery provides an important reference for the application and development of related skin care products and beauty technologies.

Ultrasonic flaw detector itself has the characteristics of high detection accuracy, fast detection speed, small size, light weight, and its own ultrasonic non-destructive testing, so it has been widely used in many fields. The measurement accuracy of ultrasonic flaw detector has a non-negligible impact on its function, and it will be affected by various factors in the use process, leading to the deviation of the measurement results. Therefore, it is necessary to do a good job of the measurement verification of ultrasonic flaw detector regularly. The metrological verification of ultrasonic flaw detector is studied and discussed from the Angle of ensuring the performance and measurement accuracy of ultrasonic flaw detector and giving full play to the function of the instrument. In the study, the metrological verification process and precautions of ultrasonic flaw detector are defined, and its dynamic range, horizontal linearity, vertical linearity, sensitivity, false positive rate and resolution are verified. The measurement accuracy of ultrasonic flaw detector has been significantly improved before and after comparative verification, and its own performance can be fully brought into play.