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Asian agricultural Research 2024年第8期16卷 29-32页

作者： Junxia LUO Qianqian ZHAO Lumei DUAN Yanzhen LI Huifang QIAO Zhipei DOU Jianbo ZHAO Zhengzhou Product quality inspection and testing center Zhengzhou 450006China Jiaozuo Product quality inspection and testing center Kaifeng 454000China Kaifeng Product quality inspection and testing center Kaifeng 454000China Zhengzhou agricultural Technology Extension center Zhengzhou 450002China

[Objectives]To fully understand the quality of commercial enzyme inhibition-colorimetric pesticide residue rapid detection kits,so that they can play a greater role in the detection and supervision of agricultural products.[Methods]The sensitivity of 28 kinds of pesticides was determined by using the commercially available enzyme inhibition colorimetric rapid detection kit with Hendu brand.[Results]There was a significant difference in the sensitivity of the kit to each pesticide,and the kit was more sensitive to dichlorvos among the 28 pesticides *** sensitivity to methyl isosalifos,dimethoate,isocarbophos,fenthion and phorate was poor,and the sensitivity to quinalphos was different between 3.0 and 2.5 mL.[Conclusions]The large difference of the sensitivity of the enzyme inhibition-colorimetric rapid detection kit for pesticide residues to different kits is a reason for the false positive and false negative test results of the kit,which needs to be considered by relevant personnel.

关键词： Enzyme inhibition-colorimetry Reagent kit Pesticide Inhibition rate Sensitivity

Development and validation of an analytical method for detecting chlorantraniliprole residues in fresh tea leaves

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Food Science and Human Wellness 2019年第4期8卷 362-367页

作者： Tengfei Liu Minghui Dong Fengjie Zhou Daifeng Yang Xueming Zhang Jiangsu Taihu Area Institute of agricultural Sciences Suzhou 215155China Suzhou Agro-products quality and safety inspection and test center Suzhou 215128China

An efficient method using multiwalled carbon nanotubes(MWCNTs)as dispersive solid-phase extraction sorbent was established for determining chlorantraniliprole residues in fresh tea leaves,which are known to be a troublesome matrix containing abundant pigments,via gas chromatography with an electron capture *** was used as the extraction solvent,with sodium chloride enhancing the analyte partition in the organic *** optimal mixture of MWCNTs and primary secondary amine(PSA)was based on the distribution of the target analyte recovery and on the clean-up efficiency;while matrix-matched calibration was recommended to combat the matrix *** recoveries of 95.2%–108.8%were obtained with intraday and interday precisions of less than 7.9%and 10.3%,*** linearity was observed for concentrations of 0.02–1.0 mg/kg with a correlation coefficient of *** limits of detection and quantification were 0.005 mg/kg and 0.02 mg/kg,*** method was employed to investigate the dissipation dynamics of chlorantraniliprole in fresh tea leaves with real field ***,the dissipation rates of chlorantraniliprole in fresh tea leaves followed pseudo-first-order kinetics with a half-life of 1.9 d,and the average chlorantraniliprole residue content was below 0.02 mg/kg with a harvest withholding period of 14 d.

关键词： Multiwalled carbon nanotubes Fresh tea leaves Chlorantraniliprole Dispersive solid-phase extraction Gas chromatography

Multi-mycotoxin exposure and risk assessments for Chinese consumption of nuts and dried fruits

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Journal of Integrative Agriculture 2018年第7期17卷 1676-1690页

作者： WANG Yu-jiao NIE Ji-yun YAN Zhen LI Zhi-xia CHENG Yang Saqib Farooq Institute of Pomology Chinese Academy of Agricultural Sciences Laboratory of quality and safety Risk Assessment for Fruit (Xingcheng) Ministry of Agriculture quality inspection and test center for Fruit and Nursery Stocks (Xingcheng) Ministry of Agriculture

In this study, 15 mycotoxins were detected in 233 nut and dried fruit samples from China. The 15 mycotoxins included aflatoxins （AFs： AFB1, AFB2, AFG1 and AFG2）, trichothecene toxins （TCs： T-2, ZEA, ENA, ENA1, ENB, ENB1 and BEA）, Alternaria toxins （ATs： TEN, AOH and AME） and ochratoxin A （OTA）. The mycotoxins were detected in 47.6% of the samples and all 15 of the mycotoxins were found. Two samples were positive for AFB1 and exceeded the maximum tolerable levels allowed in China. The contamination levels of the mycotoxins found in nuts, dried jujubes, raisins, dried figs and dried Iongans were in the ranges of 0.1-462.7, 0.2-247.3, 0.8-10.1,0.2-384.1 and 0.1-89.2 μg kg^-1, respectively. Dried figs （80.0%） had the highest incidence of mycotoxins, followed by dried Iongans （60.0%）, dried jujubes （57.1%）, nuts （43.6%） and raisins （26.7%）. The estimated daily intake （EDI） values of each individual mycotoxin and all of the mycotoxins collectively were calculated by both the deterministic approach （DA） and the probability approach （PA）. For risk characterization, dietary exposure to TCs, ATs and OTA through consumption of nuts and dried fruits according to both approaches, showed no health risk to Chinese adults by exposure to either individual mycotoxins or in combination. To the best of our knowledge, this is the first work in which risk assessment of multimycotoxins is performed, specifically including the emerging ENNs and BEA, in nuts and dried fruits of China.

关键词： mycotoxins risk assessment deterministic analysis probabilistic analysis nuts dried fruits

Analysis of Heavy Metal Content in Organic Fertilizers and Evaluation of Its Accumulation in Soil and Vegetable

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agricultural Science & Technology 2019年第3期20卷 39-46页

作者： HAO Hui-juan CHEN Wan-ming LV Yun-tao LIAO Zhong-jian changsha center for inspection and test for quality and safety of agricultural products Ministry of Agriculture and Rural AffairsChangsha 410005PRC

The heavy metal contents of 54 organic fertilizer samples from Hunan Province were detected;meanwhile,through field plot experiments,the accumulations of heavy metals from chicken excrement-based organic fertilizer in soil and vegetables under different fertilization methods were *** experiment results indicated that:(1)The average contents of Pb,Cd,Cr,As,Hg,Cu,Zn and Ni in the sampled fertilizers were 8.18,0.77,17.80,2.80,0.83,70.36,198.84 and 81.48 mg/kg,respectively;Cu and Zn exceeded the most than their standards,followed by As,Hg,Cd and Cr.(2)Among the organic fertilizers produced by different raw materials,industrial sludge contained the highest content of heavy metals,followed by the livestock excrements,oil-seed-meals and crop straw.(3)Only applying chemical fertilizer had a relatively small in fluence on the accumulation of heavy metal in soil while decreasing its pH value;the mixture of chemical fertilizer and chicken manure could increase the pH value in soil while accumulating little heavy *** is recommended that the mixture of chemical fertilizer and chicken manure should be a prior choice so as to improve soil property and ensure the safety of agricultural ***,when applying double amount of chicken manure,the contents of 8 heavy metals in soil were increased,among which Cd,Cu,Zn had obtained obvious accumulation effects,which were higher than applying a single portion of chicken manure fertilizer.(4)After two years of the field plot experiments,the accumulation of heavy metal in vegetables was not obvious under all designed fertilization modes,though increasing slightly.

关键词： Organic fertilizers Heavy metal Soil-vegetable Accumulation

Apple microbial communities and differences between two main Chinese producing regions

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Food quality and safety 2022年第1期6卷 34-44页

作者： Youming Shen Jianyi Zhang Jiyun Nie Hui Zhang Syed Asim Shah Bacha College of Horticulture Qingdao Agricultural University/Laboratory of Quality&Safety Risk Assessment for Fruit(Qingdao)Ministry of Agriculture and Rural Affairs/National Technology Centre for Whole Process Quality Control of FSEN Horticultural Products(Qingdao)/Qingdao Key Lab of Modern Agriculture Quality and Safety EngineeringQingdaoChina Institute of Pomology Chinese Academy of Agricultural Sciences/Laboratory of Quality&Safety Risk Assessment for Fruit(Xingcheng)Ministry of Agriculture and Rural Affairs/Quality Inspection and Test Center for Fruit and Nursery Stocks(Xingcheng)Ministry of Agriculture and Rural AffairsXingchengChina

Microbes on fresh apples are closely associated with fruit disease,preservation,and quality *** into the microbial commu-nities on apples from different producing regions could reveal the microbial specificity and help disease prevention and quality *** this paper,the apple surface microbes of 44 samples from two main Chinese apple-producing regions,Bohai Bay(BHB)and the Loess Plateau(LP),were investigated by sequencing fungal internal transcribed spacer and bacterial 16s rRNA hypervariable *** and LP apples con-tained significantly different bacterial and fungal *** apples had a higher fungal diversity than LP apples.A total of 102 different fungal and bacterial taxonomies were obtained between apples from the two regions,in which 24 genera were *** apples had higher phytopathogenic fungal genera,such as Tilletiopsis,Acremonium,Candida,and Phoma,indicating the higher phytopathogenic risks of apples from the humid climate of the BHB *** apples contained more bacterial genera identified as gut microbes,indicating the potential risks of contaminating apples with foodborne pathogens in the arid environment of the LP This study highlighted the environment-oriented mi-crobial specificity on apples from two main apple-producing regions,and provided a basis for further investigation.

关键词： Apple regional climate microbiome metagenomics next generation sequencing

Research progress on the origin traceability of edible oils

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Oil Crop Science 2020年第4期5卷 194-197页

作者： Qian Zhou Xinjing Dou Liangxiao Zhang Wei Fan Shiyin Guo Weiguo Wu Zhonghai Tang College of Food Science and Technology Hunan Agricultural UniversityChangsha410128China Oil Crops Research Institute Chinese Academy of Agricultural SciencesWuhan430062China Laboratory of quality and safety Risk Assessment for Oilseeds products(Wuhan) Ministry of Agriculture and Rural AffairsWuhan430062China quality inspection and test center for Oilseeds products Ministry of Agriculture and Rural AffairsWuhan430062China Hunan Engineering Technology Research center for Rapeseed Oil Nutrition Health and Deep Development Changsha410128China

The origin traceability of edible oil is an effective way to protect the legitimate rights and interests of producers and *** review briefly summarizes research progress on origin traceability technologies for edible oils including stable isotope ratio mass spectrometry,mineral element fingerprint analysis,organic component fingerprint analysis,near-infrared spectroscopy,nuclear magnetic resonance technology and biochemical ***,the development trends in edible oil origin traceability technology were proposed.

关键词： Edible oil Origin traceability Stable isotope ratio Mineral element fingerprint Organic composition

Effects of 105 traditional Chinese medicines on the detection ofβ-agonists in medicine extracts and swine urine based on colloidal gold immunochromatographic assay

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Journal of Integrative Agriculture 2021年第6期20卷 1626-1635页

作者： WANG Zi-lin FENG Ke-ying GE Xiu-feng MAI Jia-cheng WANG Han-chuan LIU Wen-zi ZHANG Jia-hui SHEN Xiang-guang Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and safety Evaluation South China Agricultural UniversityGuangzhou 510642P.R.China Animal and Poultry products quality Control Inspection and Testing CenterMinistry of Agriculture and Rural AffairsGuangzhou 510642P.R.China

Colloidal gold immunochromatographic assay(CGIA)is commonly used for the on-site detection ofβ-agonists that are sometimes used illegally as feed additives in swine ***,few studies have evaluated the causes of false-positive results that sometimes occur when applying CGIA in agricultural *** this study,we investigated if this false-positive phenomenon is related to the addition of certain traditional Chinese medicines(TCMs)to swine *** established and verified an extraction method for TCMs,and then applied CGIA to detectβ-agonists in the extracts of 105 TCMs and in the urine of swine dosed with TCMs,*** chromatography-tandem mass spectrometry was used to validate the results of the urine samples tested positive forβ-agonists using *** results were also verified using TCMs and colloidal gold test strips produced by different *** extracts of Citri Reticulatae Pericarpium Viride,Citri Reticulatae Pericarpium,Magnoliae Officinalis Cortex,Chaenomelis Fructus,and Rhodiolae Crenulatae Radix Et Rhizoma were tested positive forβ-***,the addition of Citri Reticulatae Pericarpium Viride and Citri Reticulatae Pericarpium to swine feed resulted in false-positive results forβ-agonists in swine *** results provide a new way to explain false-positive CGIA results and provide valuable information for livestock feeding programs.

关键词： colloidal gold immunochromatographic assay false positive traditional Chinese medicine β-agonists swine urine

Evaluation of Uncertainty in Determination of Reducing Sugar Content in Sugarcane

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agricultural Biotechnology 2015年第4期4卷 72-76页

作者： Jie LIAO Feiyan YAN Leixing MO Tianshun WANG Yu YA Yegeng FAN Fang HUANG Bo LIN Li TANG agricultural Product quality safety and Detection Technology Research Institute Guangxi Academy of Agriculture Sciences quality inspection and test center for Sugarcane and Its products Ministry of Agriculture

[ Objective] This study aimed to establish an effective method for evaluating uncertainty in determination of reducing sugar content in sugarcane with Lane-Ernon method. [ Method] Based on analysis of the main sources of uncertainty in determination of reducing sugar content in sugarcane and mathematical model construction, combined uncertainty and expanded uncertainty were determined to establish the method for evaluation of uncertainty in determination. [ Result] Among uncertainties in determination of reducing sugar content in sugarcane with Lane-Ernon method, the greatest uncertainty was introduced by duplicate determination. According to results of statistical analysis, the expanded uncertainty in determination of reducing sugar content was 0.012%. [ Conclusion] This study provided theo- retical reference for evaluation of uncertainty in determination of reducing sugar content in sugarcane.

关键词： Sugarcane quality testing Reducing sugar Lane-Ernon method Error Uncertainty

Virulence changes in Vibrio parahaemolyticus during the freezing of Penaeus chinensis

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Food Science and Human Wellness 2023年第6期12卷 2362-2368页

作者： Zenghui Gao Heer Ding Ke Li Qiang Zhang Xubo Zhao Bin Liu Tianli Yue College of Food Science and Engineering Northwest A&F UniversityYangling 712100China Laboratory of quality&safety Risk Assessment for Agro-products Ministry of Agriculture and Rural AffairsYangling 712100China National Engineering Research center of Agriculture Integration test Yangling 712100China Zhejiang Academy of Science&Technology for inspection&Quarantine Hangzhou 310051China

Although Vibrio parahaemolyticus has become the most common pathogen in fresh and frozen seafood,its virulence changes have often been ignored during the processing of *** investigate these potential risks,we used frozen Penaeus chinensis as examples,and the most virulent factors of ***,including amounts,viable but nonculturable(VBNC)status,toxins TDH and TRH,and virulence genes tdh and trh,were *** quantities were signifi cantly reduced during drain and sprinkling phases,but caused by different *** SYTO9 and PI staining showed that washing was the main reason for the bacterial reduction at the drain phase,while the strain entering VBNC state was another reason at sprinkling *** hemolysis toxicity,produced by TDH and TRH,became stronger after inoculation on shrimp,and could be detected throughout the ***,tdh and trh also exhibited trends similar to that of the hemolysis toxicity *** was almost to a two-fold expression level during ice-glazing phase,while trh only express at a low level,less than half of the expression level before *** results demonstrated that the strains were not dead during freezing process,but became VBNC cells,which still produced and accumulated toxins,especially TDH,the most virulent factor.

关键词： Vibrio parahaemolyticus Penaeus chinensis Frozen processing Viable but nonculturable tdh

Simultaneous Determination of Plant Growth Regulators in Fruits Using a Modified Qu ECh ERS Procedure and UPLC–MS/MS

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Horticultural Plant Journal 2016年第4期2卷 203-208页

作者： YAN Zhen NIE Jiyun XU Guofeng LI Haifei LI Jing LI Zhixia WU Yonglong KUANG Lixue Institute of Pomology Chinese Academy of Agricultural SciencesQuality Inspection and Test Center for Fruit and Nursery StocksLaboratory of Quality and Safety Risk Assessment for Fruit (Xingcheng)Ministry of Agriculture

Six plant growth regulators frequently used in fruit were detected using UPLC–MS/MS including chlormequat chloride, GA3, forchlorfenuron,paclobutrazol, thidiazuron and 2,4-D. A modified Qu ECh ERS method was used in pretreatment: each compound was extracted with acetonitrile containing 1% acetic acid and cleaned with a mixture of ostade-cylsilane(ODS) and Mg SO_4. The detection was performed using electrospray ionization(ESI) and multiple reaction monitoring mode(MRM) and quantified using the external standard method. Results indicated that the calibration curves of six plant growth regulators were linear within the range of 1–100 μg·kg^(-1) with correlation coefficients over 0.999. The recovery at four spiked concentrations, 1, 20, 50, and 100 μg·kg^(-1), ranged from 60.77% to 119.43% and relative standard deviation(RSD) were between 0.18% and 32.94%. The limits of detection(LOD) and limits of quantitation(LOQ) were 0.01–0.14 μg·kg^(-1) and 0.02–0.46 μg·kg^(-1), respectively, for apples, 0.01–0.18 μg·kg^(-1) and 0.03–0.59 μg·kg^(-1) for grapes, 0.01–0.08 μg·kg^(-1) and 0.04–0.28 μg·kg^(-1) for kiwis, 0.003–0.110 μg·kg^(-1) and 0.01–0.38 μg·kg^(-1) for peaches, and 0.01–0.08 μg·kg^(-1) and 0.03–0.25 μg·kg^(-1) for oranges.

关键词： fruit plant growth regulator Qu ECh ERS UPLC–MS/MS