Objective To supervise and evaluate the rapid testing laboratory of edible agricultural products, and to check the implementation of local rapid testing. Methods On the basis of the relevant evaluation rules of Guangdong administration for market regulation, combined with the relevant requirements of the government's rapid inspection laboratory operation and management, a comprehensive evaluation of the rapid inspection laboratory was conducted from the aspects of laboratory site, rapid inspection system establishment, completion situation, sampling situation, original records, follow-up treatment, quick inspection products and equipment management. Results The supervision and evaluation of 12 government rapid inspection laboratories for edible agricultural products was carried out, and the comprehensive scores were all above 89 points. Each government rapid inspection laboratory assessed 6 blind samples, only E government rapid inspection laboratory blind sample assessment accuracy rate did not reach 100%. The results of supervision and evaluation were satisfactory. Conclusion The rapid inspection laboratory of local edible agricultural products has achieved certain results in giving play to the 'firewall' of rapid inspection and screening, but there are still some problems and risk points. It is suggested to start with personnel training, original records, rapid inspection products and equipment management, rapid inspection quality control, supervision and assessment, so as to promote the continuous improvement of the detection ability of the rapid inspection laboratory.

Objective To determine the content of inorganic arsenic inshellfish and aquatic products by high performance liquidchromatography-inductively coupled plasma mass spectrometry, and toevaluate the food safety according to the content level of inorganicarsenic. Methods Four kinds of shellfish products were randomlypurchased from local markets and extracted by soaking in acid solution.After separation and filtration, the content of inorganic arsenic in theextracted solution was determined. Results The average inorganic arseniccontent of the 4 kinds of shellfish products were 0.067 ~0.140 mg/kg forPaphia undulata, 0.120 ~0.470 mg/kg for clam Philippines, 0.061 ~0.140mg/kg for clam white, and ${0.056}\sim {0.190}\mathrm{{mg}}/\mathrm{{kg}}$ for Sinonovacula constricta, respectively. The highest content ofinorganic arsenic was found in Philippinarum clam. Conclusion Thecontent of inorganic arsenic in shellfish products sold in Foshan Cityin 2023 does not exceed the limit value of ${0.5}\mathrm{{mg}}/\mathrm{{kg}}$ ofChina’s national food safety standard. Common shellfish aquatic productsare generally safe to eat. However, it is still necessary to be cautiousabout eating high-risk shellfish products and pay attention to thoroughcooking and processing. At the same time, it is necessary to strengthenthe awareness of food safety, strengthen the supervision and managementof such aquatic products, and carry out food safety knowledge publicityand health education.

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.

Objective Goal by verifying the performance indicators of16 items such as alanine aminotransferase (ALT), the performance of thedetection system of BS-2800M, a fully automatic biochemical analyzerproduced by Mindray manufacturer, which was newly put into use in thislaboratory was evaluated, so as to improve the work quality of thelaboratory and ensure the accuracy and reliability of the test results. Methods According to the accuracy, precision, linear range and referenceinterval of the test items, the performance of 16 test items such asalanine aminotransferase (ALT) was evaluated. No unacceptableperformance was found in the evaluation process, indicating that theanalytical performance of the test method was accepted and met therequirements of clinical specimen detection. The entire validationprocess is based on the Requirements of the Guidelines for theAccreditation of Quality and Competence of Medical Laboratories in theField of Clinical Chemistry Examination, referring to the requirementsof CLSI EP15-A3, EP6, C28-A2 and EP15-A23 documents. Results Therelative bias of 16 items was $<1/2$ total allowable error (TEa). The coefficient of variation(CV) in precision batch was $<1/4$ tea, the total CV was $<1/3$ tea, the b values of 16 items were in the range of ${1.00}\pm {0.03}$ , and ${r}^{2}$ was $\geq {0.95}$ . The maximum dilution andclinical reportable range were verified and met the requirements. Conclusion The accuracy, precision, linearity and clinical reportablerange of the 16 tested items meet the requirements of quality objectivesand can be used for clinical detection.

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.

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.

Objective To investigate the effects of enrofloxacin andciprofloxacin residues in hot processed shrimp and to provide referencefor dietary risk assessment. Methods The shrimp (Penaeus indicus) afterdrug administration was selected as raw material, and a detection methodbased on RP-HPLC-FLD was established. The shrimp was processed by twohot processing methods: boiling and drying. The effects of water-shrimpratio (proportion of water to shrimp), boil holding time, dryingtemperature and drying time on residual concentrations of enrofloxacinand ciprofloxacin in shrimp were evaluated. Results During the boilingprocess, the residual concentrations of enrofloxacin and ciprofloxacinin shrimp decreased with the increase of water-to-shrimp ratio andboiling retention time, and the residual concentrations reached theminimum when the water-to-shrimp ratio was 5 . Under this condition, theeffect on the residual concentrations was significantly reduced afterthe boiling retention time reached ${20}\mathrm{\;{min}}$ . During the dryingprocess, the residual concentrations of enrofloxacin and ciprofloxacinincreased with increasing drying temperature and remained basicallyunchanged between 150 and ${180}^{\circ }\mathrm{C}$ . When thedrying temperature was set at ${150}^{\circ }\mathrm{C}$ , the residualconcentration increased with the increase of drying time and remainedbasically unchanged between 5 and 8 min. Studies have shown that boilingcan significantly reduce the residual concentrations of enrofloxacin andciprofloxacin in shrimp, while drying can cause the residualconcentrations to increase on the basis of boiling. The overallprocessing factor of enrofloxacin and ciprofloxacin was less than 1 ,indicating that the residual concentrations of enrofloxacin andciprofloxacin in dried shrimp were lower than those in raw shrimp. Conclusion The study in this paper can help processing enterprises orquality supervision departments to effectively evaluate the impact ofantibiotic residues in hot processing shrimp, and put forward relevantsuggestions on food safety.

The quality of urban sewage discharge affects the protection of urban water resources, ecological environment and so on, and has an impact on urban economic development and civilization construction. Therefore, it is very important to do a good job in water quality monitoring and management of drainage pipe network. This paper briefly describes the importance of water quality monitoring and water quality management, analyzes the factors that affect the quality of water quality monitoring, including human causes and monitoring equipment, and puts forward measures to improve the quality of water quality monitoring results. Finally, it puts forward measures such as building an information management system of drainage pipe network and perfecting the water quality monitoring management system to ensure the quality of urban sewage discharge.

In order to build a comprehensive and in-depth university laboratory safety management system and systematically eliminate laboratory safety hazards, this article takes 259 core literature on university laboratory safety management systems collected from "China National Knowledge Infrastructure" from 2008 to 2024 as the basic data, and uses Cite Space software to visualize the research authors, research institutions, keywords, and other aspects, further analyzing the research status and development trends. The results indicate that the number of publications in this field has been increasing year by year, but there is relatively little interaction among researchers, and research institutions are relatively independent with unclear collaborative relationships. Research hotspots mainly focus on safety awareness, system construction, risk assessment, safety culture, emergency management, security system, and other aspects. In the future, emphasis should be placed on building laboratory safety management systems from these hotspots.

Objective In order to prevent the volatilization loss of volatile oil components such as bornyl acetate in Amomum villosum powder during storage, a reasonable and effective storage conditions and storage validity period of Amomum villosum powder were developed, so as to improve the quality stability and food efficiency of terminal products. Methods The samples of Amomum villosum powder in different storage environments [high temperature (35°C), cool (10~15°C) and cold storage (0~5°C)] were sampled every week, and the contents of bornyl acetate and volatile oil were determined respectively. Finally, the trend analysis was carried out according to the content results. Results According to the experimental results, the contents of bornyl acetate and volatile oil in Amomum villosum powder under different storage conditions were quite different. The contents of bornyl acetate and volatile oil in Amomum villosum powder under cold storage conditions were slightly higher than those under shade conditions, but they were significantly higher than those under high temperature storage conditions. Conclusion The research results provide an in-depth analysis of the changes in the main components of Amomum villosum powder under different storage conditions, providing important reference for enterprises to choose the storage method of Amomum villosum powder.