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Review on the application of upconversion nanomaterials in heavy metal detection
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作者 Yu-Hong He Xi Yu 《Food and Health》 2024年第3期1-17,共17页
As a widespread element,heavy metals have a significant impact on human health and threaten human health.It is of great significance to develop analytical technologies that can detect heavy metal ions quickly and accu... As a widespread element,heavy metals have a significant impact on human health and threaten human health.It is of great significance to develop analytical technologies that can detect heavy metal ions quickly and accurately.In comparison to conventional fluorescent materials such as organic dyes,quantum dot(QD)labels,and carbon quantum dots(CD),fluorescence detection technology utilizing lanthanide(Ln)ion-doped upconversion nanoparticles(UCNPs)stands out due to its distinctive attributes.These include a notably reduced autofluorescence background,enhanced tissue penetration capabilities,biocompatibility with cellular tissues,and minimal photodamage inflicted on biological samples.The utilization of this technology has garnered considerable attention across multiple fields.In the domain of heavy metal detection,traditional laboratory methods necessitate costly instrumentation and a fully equipped laboratory,involving intricate sample processing procedures and protracted detection periods,as well as a demand for skilled personnel.In contrast,the implementation of this material offers rapid and cost-effective detection,significantly mitigating the technical barriers for operators.Consequently,this represents an exceptional avenue to curtail expenses and broaden the scope of detection within the analytical process.This paper reviews the research progress of UCNPs in the detection of heavy metal ions,encompassing a brief elucidation of the luminescence principle of upconversion nanomaterials and commonly used detection principles.Additionally,it provides a detailed overview of the research status of several common non-metal ions and essential heavy metals.Furthermore,it summarizes the current focal points in UCNP detection and discusses the challenges and prospects associated with it. 展开更多
关键词 heavy metals Upconversion nanoparticles Gold nanoparticles NANOSENSOR Fluorescence detection technology
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THE STUDY ON NOVEL MICROELECTRODE ARRAY CHIPS FOR THE DETECTION OF HEAVY METALS IN WATER POLLUTION 被引量:1
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作者 HUI-XIN ZHAO WEI CAI +2 位作者 DA HA HAO WAN PING WANG 《Journal of Innovative Optical Health Sciences》 SCIE EI CAS 2012年第1期11-17,共7页
Qualitative and quantitative analysis of trace heavy metals in aqueous environment are rapidly assuming significance along with the rapid development of industry.In this paper,gold microelectrode array(MEA)plated with... Qualitative and quantitative analysis of trace heavy metals in aqueous environment are rapidly assuming significance along with the rapid development of industry.In this paper,gold microelectrode array(MEA)plated with mercury film was used for simultaneous voltammetric detection of zinc,cadmium,lead and copper ions in water.The electrochemical behavior and the actual surface area of the MEA were investigated by cyclic voltammetry in K_(3)[Fe(CN)_(6)].Electrochemical impedance spectrum(EIS)was utilized to examine the deposition of mercury on the electrode surface.Based on anodic stripping voltammetry,mercury filmAu MEA was applied to the detection of heavy metals in artificial analyte,where good calibrate linearity was obtained for cadmium,lead and copper ions,but with zinc exhibiting poor linearity. 展开更多
关键词 Microelectrode array(MEA)chip heavy metals detection water pollution
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Detection and Analysis of Heavy Metal Pollution in Part Poultry Farms in Eastern China
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作者 Pu Junhua Chen Dawei +1 位作者 Liu Yinyin Yang Zhangping 《Animal Husbandry and Feed Science》 CAS 2015年第4期220-222,共3页
Heavy metal contents of water, feed and manure samples in part poultry farms in Eastern China were investigated. In the survey, 49 samples were col- lected including 16 water samples, 24 feed samples and 9 manure samp... Heavy metal contents of water, feed and manure samples in part poultry farms in Eastern China were investigated. In the survey, 49 samples were col- lected including 16 water samples, 24 feed samples and 9 manure samples. The Samples were processed by microwave digestion, the contents of copper (Cu), zinc (Zn), plumbum (Pb), cadmium (Cd) and chromium (Cr) were detected by atomic absorption spectrometry, the contents of arsenic (As) and mercury (Hg) were detected by inductively coupled plasma mass spectrometry(1CP-MS). The Sesults showed that the contents of Cu, Zn, Pb, As, Cd and Cr in water samples were very low, which reached The Standard of Class 111 Water Quality according to Environmental Quality Standard for Surface Water. The contents of Cr and As in part feed samples exceeded National Hygienical Standard, and the exceeding standard rates of Cr and As reached 33.3% and 8.3%, the highest contents of Cr and As were 622.5 mg/kg and 5.8 mg/kg respectively. The contents of all the metals in manures were in the range of the standard except Cu. The study suggested that heavy metal pollution existed in a few poultry farms, the contents of Cu, Cr and As in feeds should be controlled. 展开更多
关键词 Poultry farms heavy metals detection
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Sources, distribution, behavior, and detection techniques of microplastics in soil: A review
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作者 Yu-chen Yan Zhong-fang Yang 《China Geology》 CAS CSCD 2023年第4期695-715,共21页
In recent years, the problem of environmental pollution caused by microplastics has attracted widespread attention. This paper reviews the latest research progress in terms of the source, content and distribution char... In recent years, the problem of environmental pollution caused by microplastics has attracted widespread attention. This paper reviews the latest research progress in terms of the source, content and distribution characteristics, harm, and detection technology of soil microplastics by referring to the relevant literature on soil microplastics worldwide. It concludes that:(1) Existing studies worldwide have detected the presence of microplastics in soil, water, and atmosphere, and the use of agricultural films, sewage sludge,and other man-made activities are the main sources of microplastics in soil;(2) microplastics can adsorb heavy metals, persistent organic pollutants and antibiotics in soil, change the physical and chemical properties of soil. This will result in composite pollution and harm to the ecosystem;(3) microplastics in soil not only can destroy the activity of key soil microorganisms, but also enter the body of crops and soil animals, affecting normal growth of crops and soil animals, and further threaten human health;(4) at present, there is no unified operating standard for the sampling, processing, and detection process of microplastics. Analysis methods such as visual inspection, spectroscopy, and thermal analysis have both advantages and disadvantages, and emerging detection technologies require urgent development.Microplastics have become a new pollutant in soil and their distribution characteristics are closely related to human activities. They pollute the environment and threaten human health through the food chain.Although related research on soil microplastics has just begun, it will become the focus of research in the future. 展开更多
关键词 SOIL microplastic heavy metal organic pollutant antibiotic MICROORGANISM ecological risk composite pollution detection method
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Detection and quantification of Pb and Cr in oysters using laser-induced breakdown spectroscopy
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作者 闫清霞 田野 +7 位作者 李颖 林洪 贾自文 卢渊 俞进 孙琛 白雪石 Vincent DETALLE 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第4期195-203,共9页
The quantitative determination of heavy metals in aquatic products is of great importance for food security issues.Laser-induced breakdown spectroscopy(LIBS)has been used in a variety of foodstuff analysis,but is stil... The quantitative determination of heavy metals in aquatic products is of great importance for food security issues.Laser-induced breakdown spectroscopy(LIBS)has been used in a variety of foodstuff analysis,but is still limited by its low sensitivity when targeting trace heavy metals.In this work,we compare three sample enrichment methods,namely drying,carbonization,and ashing,for increasing detection sensitivity by LIBS analysis for Pb and Cr in oyster samples.The results demonstrate that carbonization can remove a significant amount of the contributions of organic elements C,H,N and O;meanwhile,the signals of the metallic elements such as Cu,Pb,Sr,Ca,Cr and Mg are enhanced by3–6 times after carbonization,and further enhanced by 5–9 times after ashing.Such enhancement is not only due to the more concentrated metallic elements in the sample compared to the dried ones,but also the unifying of the matter in carbonized and ashed samples from which higher plasma temperature and electron density are observed.This condition favors the detection of trace elements.According to the calibration curves with univariate and multivariate analysis,the ashing method is considered to be the best choice.The limits of detection of the ashing method are 0.52 mg kg-1 for Pb and0.08 mg kg-1 for Cr,which can detect the presence of heavy metals in the oysters exceeding the maximum limits of Pb and Cr required by the Chinese national standard.This method provides a promising application for the heavy metal contamination monitoring in the aquatic product industry. 展开更多
关键词 laser-induced breakdown spectroscopy(LIBS) heavy metal detection signal enhancement sample preparation method quantification OYSTERS
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Trends of Laboratory-Detected Heavy Metals in Children: Solutions for Heavy Metal Contamination in Infant Food Products
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作者 Maidah Khan 《Food and Nutrition Sciences》 2023年第9期791-811,共21页
In 2019, an investigation by the U.S. House of Representatives revealed major infant food conglomerates had products with high levels of arsenic, lead, cadmium, and mercury, posing concerns for infants’ vulnerability... In 2019, an investigation by the U.S. House of Representatives revealed major infant food conglomerates had products with high levels of arsenic, lead, cadmium, and mercury, posing concerns for infants’ vulnerability to the neurotoxic effects of these metals. Trends of laboratory-detected heavy metals were analyzed in children aged zero to five from 1999-2020, providing insights on heavy metal contamination in infant food products. Utilizing National Health and Nutrition Examination Survey (NHANES) data, mean heavy metal levels in children were calculated, considering gender, race, and income-to-poverty ratio as proxies for assessing associations with increasing heavy metal rates in infant food. Findings indicated an overall decrease in mean concentrations over time, though remaining elevated. Black children exhibited higher lead levels than the overall average, while the Asian subgroup displayed higher levels of total blood mercury and cadmium levels. Lack of internal standards in regulatory bodies, particularly the FDA, exacerbates the issue, with no legally enforceable guidelines or strict maximum levels for heavy metals in infant foods. Urgent FDA interventions are needed, addressing contamination at the sources of raw materials, implementing transparent and extensive product testing, and comprehensive manufacturer labeling to inform consumers about elevated heavy metal levels in infant products. 展开更多
关键词 Infant Nutrition Infant Food Products Laboratory-detected heavy metals Environmental Contaminants Consumer Safety
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Detection and Evaluation of Metals in Tea and Soils of Tea Gardens in Mingshan 被引量:1
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作者 Xianxiang Dai Jia Dou +1 位作者 Yingying Zhang Xianxiang Wang 《Meteorological and Environmental Research》 CAS 2013年第2期26-29,33,共5页
[ Objective] The study aimed to detect and assess metal ions in tea and soil of tea gardens in Mingshan County. [ Method] Seven metals ( including Pb, Cr, Cu, Ca, Mn, Mg and Zn) in soil and tea samples of tea garden... [ Objective] The study aimed to detect and assess metal ions in tea and soil of tea gardens in Mingshan County. [ Method] Seven metals ( including Pb, Cr, Cu, Ca, Mn, Mg and Zn) in soil and tea samples of tea gardens in Mingshan were determined by atomic absorption spectrometry, and the pollution situation of the soil and tea by Pb, Cr and Cu were evaluated using the single factor pollution index and Nemerow pollu- tion index, finally the accumulation of heavy metals in different soils were analyzed by the enrichment factor. I-Result] There was little difference for the same heavy metals in various soils, but different heavy metals had very significant difference. The enrichment factors of metals needed by tea growing, such as Ca, Mn, Mg and Zn, were higher than heavy metals like Pb and Cr. In addition, soils and tea of the six tea gardens were not polluted by Pb, Cr and Cu, and both single factor pollution index and Nemerow pollution index were below 0.7. [ Condusion] The research could provide scientific references for preventing tea from being polluted by heavy metals. 展开更多
关键词 Mingshan TEA SOIL heavy metals detection China
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Improved sensitivity on detection of Cu and Cr in liquids using glow discharge technology assisted with LIBS 被引量:1
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作者 Duixiong SUN Yarui WANG +2 位作者 Maogen SU Weiwei HAN Chenzhong DONG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2022年第8期64-70,共7页
Laser-induced breakdown spectroscopy-assisted glow discharge(LIBS-GD)for analysis of elements in liquid was proposed,and it was applied to detect heavy metals in highly sensitive mixed solutions of Cu and Cr.During th... Laser-induced breakdown spectroscopy-assisted glow discharge(LIBS-GD)for analysis of elements in liquid was proposed,and it was applied to detect heavy metals in highly sensitive mixed solutions of Cu and Cr.During the experiments of GD and LIBS-GD,the experimental parameters have been optimized and the optimal voltage is 450 V,laser energy is 60 mJ,and the delay time is 4000 ns.Furthermore,the calibration curves of Cu and Cr under GD and LIBS-GD experiments have been established,and the limits of detection(LODs)of Cu and Cr were obtained with the method of GD and LIBS-GD,respectively.The LOD of Cu decreased from3.37(GD)to 0.16 mg l(LIBS-GD),and Cr decreased from 3.15 to 0.34 mg l.The results prove that the capability of elemental detection under LIBS-GD has improved compared with the GD method.Therefore,LIBS-GD is expected to be developed into a highly sensitive method for sewage detection. 展开更多
关键词 laser-induced breakdown spectroscopy glow discharge heavy metal limits of detection
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Sign Response Mechanism of TCA Self-assembled Fluorescence Probe for Cu^2+ Detection: FRET Evidence by DFT
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作者 李福君 洒荣健 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第8期1186-1200,共15页
A new type of self-assembled molecule ON-OFF fluorescence probe for toxic transition metal ions, made up of thiacalix[4]arene, micelle and fluorescence group, has been studied by DFT/TDDFT method combined with experim... A new type of self-assembled molecule ON-OFF fluorescence probe for toxic transition metal ions, made up of thiacalix[4]arene, micelle and fluorescence group, has been studied by DFT/TDDFT method combined with experiment spectra. Since the mechanism of the optical quenching signal response of such self-assembled micelle probe has always been a controversial issue of uncertainty, the spatial construction and geometric structures of the functional units of probe in the Cu2+ ion detecting process were calculated and the mechanism was investigated by the molecular transition orbital pairs method to explore the origination of ON-OFF fluorescence sign response. The results presented that the signal response mechanism of the micelle probe is ascribed to F?rster resonance energy transfer(FRET) which provides new sights different from most of the conclusions by the related research work reported. 展开更多
关键词 ON-OFF fluorescence probe density functional theory FOster resonance energytransfer heavy metal ions detection micelle self-assembled complex
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Progress on sensors based on nanomaterials for rapid detection of heavy metal ions 被引量:8
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作者 Yuan Liu Yan Deng +2 位作者 Hongming Dong Keke Liu Nongyue He 《Science China Chemistry》 SCIE EI CAS CSCD 2017年第3期329-337,共9页
The heavy metal ions,especially Cd^(2+),Pb^(2+) and Hg^(2+),show extremely hazard to the environment and human being.The measurement of heavy metal ions using sensors is catching more and more attention for its advant... The heavy metal ions,especially Cd^(2+),Pb^(2+) and Hg^(2+),show extremely hazard to the environment and human being.The measurement of heavy metal ions using sensors is catching more and more attention for its advantages of high sensitivity and selectivity,low-cost,convenience to handle and rapid detection.In recent years,nanomaterials such as gold nanoparticles(NPs),magnetic nanoparticles,graphene and nanocomposite materials are applied in sensors for improving sensitivity and selectivity,making the research on electrochemical(EC) sensors,spectrometric biosensors and colorimetric biosensors become a hot spot in the application to investigate heavy metal ions,in particular,Cd^(2+),Pb^(2+) and Hg^(2+).In this short review,the research of advanced detection of Cd^(2+),Pb^(2+) and Hg^(2+) and its progress based on nanomaterial sensors in recent years is reviewed. 展开更多
关键词 heavy metal ions SENSORS NANOMATERIALS detection PROGRESS
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Electrochemical Sensing of Heavy Metal Ions based on Monodisperse Single-crystal Fe_3O_4 Microspheres 被引量:1
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作者 YAN Haowei HU Shuangqi 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第6期1422-1427,共6页
Single-crystal Fe_3 O_4 with monodisperse microspheres structure has been used for individual electrochemical detection of heavy metal ions. Morphology and structure of the as-prepared Fe_3 O_4 microspheres were chara... Single-crystal Fe_3 O_4 with monodisperse microspheres structure has been used for individual electrochemical detection of heavy metal ions. Morphology and structure of the as-prepared Fe_3 O_4 microspheres were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM) and X-ray diffraction(XRD). Meanwhile the electrochemical properties of the Fe_3 O_4 microspheres modified glass carbon electrodes(GCE) were characterized by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS), and the enhanced electrochemical response in stripping voltammetry for individual detection of Pb(Ⅱ), Hg(Ⅱ), Cu(Ⅱ), and Cd(Ⅱ) was evaluated using square wave anodic stripping voltammetry(SWASV). With high specific surface area and excellent catalytic activity toward heavy metal ions, the as-prepared monodisperse and single-crystal Fe_3 O_4 microspheres show a preferable sensing sensitivity(22.2 μA/μM) and limit of detection(0.0699 μM) toward Pb(Ⅱ). Furthermore, the electrochemical sensor of Fe_3 O_4 microspheres exhibits excellent stability and it also offers potential practical applicability for the determination of heavy metal ions in real water samples. This study provides a potential simple and low cost iron oxide for the construction of sensitive electrochemical sensors applied to monitor and control the pollution of toxic metal ions. 展开更多
关键词 FE3O4 MICROSPHERES electrochemical detection heavy metal ions
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便携式激光诱导击穿光谱仪测定土壤中重金属 被引量:2
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作者 马明俊 方丽 +3 位作者 赵南京 韩守炉 陈富强 时晨 《中国无机分析化学》 CAS 北大核心 2024年第2期145-152,共8页
土壤重金属污染对农作物生长和人体健康都有严重危害,现场快速检测对土壤重金属污染调查、应急监测具有重要意义。采用自主研发的土壤重金属激光诱导击穿光谱现场快速检测仪对矿区周边土壤进行现场检测分析,以835个不同基质土壤的光谱... 土壤重金属污染对农作物生长和人体健康都有严重危害,现场快速检测对土壤重金属污染调查、应急监测具有重要意义。采用自主研发的土壤重金属激光诱导击穿光谱现场快速检测仪对矿区周边土壤进行现场检测分析,以835个不同基质土壤的光谱数据建立定标数据库,通过支持向量机建立回归模型对土壤重金属元素含量进行定量反演。现场检测获取的全波段光谱波动在15%以内,Cd、Cr、Cu、Ni、Pb和Zn等6种元素光谱强度相对标准偏差平均值为6.31%。将检测结果与实验室电感耦合等离子体质谱法分析对比,6种元素的皮尔逊相关系数r在0.8501~0.9829,检测结果80%以上处于±30%相对误差区间分布。对比结果表明自主研发的土壤重金属激光诱导击穿光谱现场检测仪可以满足现场快速检测需求。 展开更多
关键词 激光诱导击穿光谱 便携式 土壤重金属 现场检测
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Fluorogenic detection of mercury ion in aqueous environment using hydrogel-based AIE sensing films
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作者 Shujun Wu Yujiao Yang +9 位作者 Yao Cheng Shuodong Wang Zhibiao Zhou Pei Zhang Xinqi Zhu Baodui Wang Hua Zhang Sheng Xie Zebing Zeng Ben Zhong Tang 《Aggregate》 2023年第3期94-101,共8页
A“turn-on”fluorescent sensing strategy was developed for ultrasensitive detection of heavy metal mercury ion(Hg2+)directly in water.It utilized an aqueous soluble aggregation-induced emission(AIE)-active probe,named... A“turn-on”fluorescent sensing strategy was developed for ultrasensitive detection of heavy metal mercury ion(Hg2+)directly in water.It utilized an aqueous soluble aggregation-induced emission(AIE)-active probe,named 1,1,2,2-tetrakis(4-(1Htetrazol-5-yl)phenyl)ethene(TPE-4TA),composing of a luminescent tetraphenylene core and multiple anionic tetrazolate spawns.The probe retained dark when molecularly dissolved in water.However,mercury ions can ligate with multiple tetrazolate groups to form infinite coordination polymer particles spontaneously,thus inducing a fluorogenic AIE response for in situ analysis.Moreover,by embedding this AIE sensing molecules in a hydrophilic polyvinyl alcohol substrate,the resulting hydrogel film allowed in situ detection of Hg^(2+)on a laser-induced fluorescence analysis setup in aqueous environment.This strategy worked effectively in common aqueous environments with pH from 4 to 7.5 and showed high sensitivity(limit of detection down to 0.38 ppb/1.9 nM),good selectivity and a wide linearity range for quantification.This work may lead to a reliable and promising platform for on-site environmental water analysis. 展开更多
关键词 aggregation-induced emission heavy metal detection HYDROGEL
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纳米材料在食品重金属离子快速检测中的应用研究进展 被引量:1
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作者 王义平 苏淑芳 +1 位作者 袁亚兰 毛宁 《食品与机械》 CSCD 北大核心 2024年第4期233-240,共8页
纳米材料因具有比表面积大、良好稳定性、特殊的结构、易于修饰、良好的生物相容性等优点,已被广泛应用于食品中重金属离子检测领域。文章重点综述了碳纳米管、石墨烯、碳量子点、金属有机骨架、纳米酶等纳米材料在食品中重金属离子检... 纳米材料因具有比表面积大、良好稳定性、特殊的结构、易于修饰、良好的生物相容性等优点,已被广泛应用于食品中重金属离子检测领域。文章重点综述了碳纳米管、石墨烯、碳量子点、金属有机骨架、纳米酶等纳米材料在食品中重金属离子检测方面的研究与应用现状,并展望了纳米材料在食品中重金属离子检测领域面临的挑战和应用前景。 展开更多
关键词 纳米材料 食品 重金属离子 检测
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微波消解-电感耦合等离子体质谱法测定有机肥中镉、砷、汞、铅、铬含量
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作者 官迪 陈山 +3 位作者 田发祥 纪雄辉 龙世平 吴家梅 《中国土壤与肥料》 CAS CSCD 北大核心 2024年第1期226-231,共6页
采用电感耦合等离子体质谱法(ICP-MS)测定,比较湿法消解30 min,湿法消解至近干和微波消解等不同前处理方法对有机肥料中镉、砷、汞、铅、铬元素的提取效果,建立了一种基于ICP-MS测定有机肥料多种重金属元素含量的方法。结果表明:湿法消... 采用电感耦合等离子体质谱法(ICP-MS)测定,比较湿法消解30 min,湿法消解至近干和微波消解等不同前处理方法对有机肥料中镉、砷、汞、铅、铬元素的提取效果,建立了一种基于ICP-MS测定有机肥料多种重金属元素含量的方法。结果表明:湿法消解至近干和微波消解法对有机肥多元素成分分析标准物质(RMH-F001)中5项重金属含量的测试结果均满足标准要求,方法定量值、标准值偏差分别低于6.3%、5.7%;硝酸/过氧化氢体系-微波消解处理下,样品结果稳定性最佳,相对标准偏差为0.8%~6.8%,相对偏差为1.1%~9.0%,相对相差为2.2%~18.0%,加标回收率为99.4%~102.9%。硝酸/过氧化氢体系-微波消解-ICP-MS法可作为有机肥中5项重金属统一化测定的常规方法。 展开更多
关键词 湿法消解 微波消解 重金属 有机肥 统一化测定
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甜玉米自交系重金属Pb、Cd积累差异及分子检测
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作者 李淑君 刘娅娟 +3 位作者 张扬 蒲汝民 袁亮 廖长见 《福建农业学报》 CAS CSCD 北大核心 2024年第3期251-258,共8页
【目的】筛选获得在重金属Pb、Cd单一污染及复合污染下Pb、Cd低积累的优良甜玉米自交系,以及可用于甜玉米重金属Pb、Cd积累早代鉴定的分子技术。【方法】以10个甜玉米自交系为供试材料,通过盆栽试验研究重金属Pb、Cd单一污染及Pb、Cd复... 【目的】筛选获得在重金属Pb、Cd单一污染及复合污染下Pb、Cd低积累的优良甜玉米自交系,以及可用于甜玉米重金属Pb、Cd积累早代鉴定的分子技术。【方法】以10个甜玉米自交系为供试材料,通过盆栽试验研究重金属Pb、Cd单一污染及Pb、Cd复合污染下,玉米根系、茎叶和籽粒中Pb、Cd含量的积累差异;同时对供试材料ZmHMA2 InDel位点进行Pb、Cd积累差异分子检测,综合分子标记检测与重金属Pb、Cd在不同材料间的积累结果,筛选甜玉米重金属低积累自交系。【结果】无论是单一污染还是复合污染,重金属Pb、Cd的积累规律均表现为根系>茎叶>籽粒;在复合污染下,玉米不同组织对重金属Pb、Cd的积累无明显竞争与协同效应,表明玉米Pb、Cd的积累机制存在一定差异。通过鉴定,获得籽粒Pb低积累玉米自交系2份,籽粒Cd低积累玉米自交系3份,仅有一份材料闽甜系X901表现出籽粒Pb、Cd均低积累。利用InDel位点(InDel2307)对供试材料进行分子检测,结果发现供试材料中有4份存在该位点,含有该位点的材料中根系、茎叶和籽粒Cd含量平均值较其他材料平均值分别低1.801、0.64、0.131 mg·kg^(-1)。【结论】InDel2307位点能将不同玉米自交系按Cd累积量进行区分,对甜玉米Cd含量的区分具有特异性标记。综合分子标记检测与Pb、Cd含量积累结果,筛选出自交系闽甜系X901为Pb、Cd低积累材料。 展开更多
关键词 重金属 PB污染 CD污染 甜玉米 积累特征 分子检测
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微波消解-电感耦合等离子体质谱法测定食用菌中的重金属含量
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作者 刘佳 陈瑞琦 +2 位作者 何丰瑞 赵桂鹏 秦国富 《中国食用菌》 2024年第4期65-69,共5页
利用微波消解-电感耦合等离子体质谱仪法建立同时测定食用菌中砷(As)、铅(Pb)、镉(Cd)、铬(Cr)和汞(Hg)含量的方法。在测食用菌样品中As、Pb、Cd和Cr的质量浓度为0.5~20.0μg·L^(-1),Hg的质量浓度为0.05~2.00μg·L^(-1)时,线... 利用微波消解-电感耦合等离子体质谱仪法建立同时测定食用菌中砷(As)、铅(Pb)、镉(Cd)、铬(Cr)和汞(Hg)含量的方法。在测食用菌样品中As、Pb、Cd和Cr的质量浓度为0.5~20.0μg·L^(-1),Hg的质量浓度为0.05~2.00μg·L^(-1)时,线性相关系数(r)均大于或等于0.9991,检出限分别为0.0010、0.0010、0.0020、0.0020、0.0003 mg·kg^(-1)。其中,Pb、Cd、Cr、As和Hg的加标回收率分别为93.5%~100.0%、94.2%~98.6%、97.00%~101.4%、90.1%~99.5%和90.0%~99.5%,相对标准偏差分别为0.86%~1.58%、0.18%~6.45%、0.39%~3.77%、0.27%~1.98%和0.39%~3.27%。说明该方法具有操作简单、重复性好、灵敏度高等优点,可以适用于食用菌中的As、Pb、Cd、Cr、Hg共5种重金属含量的分析检测。 展开更多
关键词 食用菌 微波消解-电感耦合等离子体质谱法 重金属 含量检测
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氨基化石墨烯电化学传感器在重金属离子检测中的运用分析
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作者 文艳清 龙倩 +1 位作者 肖跃龙 胡晞 《当代化工研究》 CAS 2024年第12期95-97,共3页
本研究旨在探讨氨基化石墨烯电化学传感器在重金属离子检测中的应用,特别是针对Cd^(2+)和Pb^(2+)的检测。研究内容主要包括氨基化石墨烯(NH_(2)-rGO)、壳聚糖(CS)和聚谷氨酸(Glu)复合材料修饰电极的制备,以及其在电化学检测中的性能评... 本研究旨在探讨氨基化石墨烯电化学传感器在重金属离子检测中的应用,特别是针对Cd^(2+)和Pb^(2+)的检测。研究内容主要包括氨基化石墨烯(NH_(2)-rGO)、壳聚糖(CS)和聚谷氨酸(Glu)复合材料修饰电极的制备,以及其在电化学检测中的性能评估。通过对不同修饰电极的表征与性能分析,本研究揭示了NH_(2)-rGO/CS/Glu复合材料修饰电极在提高检测灵敏度和选择性方面的显著效果。研究结果表明,相比于裸电极和单一材料修饰电极,NH_(2)-rGO/CS/Glu修饰电极对Cd^(2+)和Pb^(2+)展现出了更高的灵敏度和优异的选择性。此项研究为开发新型高效电化学传感器提供了有价值的参考,对于环境监测和重金属污染控制具有重要意义。 展开更多
关键词 氨基化石墨烯 电化学传感器 重金属离子 检测结果
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肥料中重金属含量现状、限量和检测标准的研究进展
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作者 刘丽华 《当代化工研究》 CAS 2024年第16期15-17,共3页
肥料中含有Cd、Hg、Pb、Cr、As等重金属元素,是影响土壤生态和农产品质量安全的重要因素。本文综述了近年来我国肥料重金属含量现状、限量标准和检测标准的研究进展,对国内外肥料中重金属检测方法(如AAS、AFS、ICP-AES、ICP-MS)进行总结... 肥料中含有Cd、Hg、Pb、Cr、As等重金属元素,是影响土壤生态和农产品质量安全的重要因素。本文综述了近年来我国肥料重金属含量现状、限量标准和检测标准的研究进展,对国内外肥料中重金属检测方法(如AAS、AFS、ICP-AES、ICP-MS)进行总结,对肥料中重金属检测前处理方法(如电热板消解、高压密闭消解、微波消解等)分析比较,同时进一步指出肥料重金属检测的未来发展趋势和研究方向,以期为相关领域的应用和研究提供参考。 展开更多
关键词 肥料 重金属 检测 研究
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原位快速检测重金属镉的研究进展 被引量:1
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作者 闵建锋 方梦旗 栾云霞 《粮油食品科技》 CAS CSCD 北大核心 2024年第2期127-135,共9页
镉是一种对环境和人体健康有害的重金属,虽然基于原子吸收光谱仪和电感耦合等离子体质谱仪等大型仪器的常规检测方法准确度高,但不能满足快速现场检测和高通量筛查的需求。镉的原位快速检测技术,可以在粮食安全、农业物联网、生物育种... 镉是一种对环境和人体健康有害的重金属,虽然基于原子吸收光谱仪和电感耦合等离子体质谱仪等大型仪器的常规检测方法准确度高,但不能满足快速现场检测和高通量筛查的需求。镉的原位快速检测技术,可以在粮食安全、农业物联网、生物育种和环境监测等领域提供一种新型、高效、实时的方法,特别是在筛选不同镉吸收和积累特性的植物品种方面具有很大的应用潜力。本文从检测技术原理和特点入手,总结了针对动植物体内重金属镉的快速原位检测的不同技术,如电化学传感技术、荧光传感技术、光学传感器技术等,及其在食品安全监测、风险评估和在生物体内的迁移、转化和积累等领域的研究进展、应用前景和发展方向,以期为相关的科研工作提供技术参考。 展开更多
关键词 重金属 原位 快速检测
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