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基于电沉积富集-LIBS的水中Cd元素高灵敏稳定测量研究

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大气与环境光学学报 2024年第3期19卷 314-321页

作者：疏阳方丽马明俊孟德硕赵南京中国科学院合肥物质科学研究院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室安徽合肥230031 中国科学技术大学安徽合肥230026 安徽省环境光学监测技术重点实验室安徽合肥230031

针对水体痕量Cd元素的高灵敏稳定检测,基于Al片电沉积富集(ED)结合激光诱导击穿光谱(LIBS)检测的ED-LIBS水中Cd分析方法,实验研究了富集时间、富集电压、导电溶质KCl浓度以及电极表面砂纸打磨对Cd元素富集结果的影响。结果表明,经砂纸打... 详细信息

针对水体痕量Cd元素的高灵敏稳定检测,基于Al片电沉积富集(ED)结合激光诱导击穿光谱(LIBS)检测的ED-LIBS水中Cd分析方法,实验研究了富集时间、富集电压、导电溶质KCl浓度以及电极表面砂纸打磨对Cd元素富集结果的影响。结果表明,经砂纸打磨Al片电沉积富集后,Cd元素富集稳定性得到提升,同时优化确定的富集电压、富集时间和KCl浓度分别为−2.4 V、1200 s和2 g/L。利用该方法,Cd元素检测限和相对标准偏差分别为0.0021 mg/L和3.3.%,满足《生活饮用水卫生标准》指标检测需求,为水体中痕量Cd元素的高灵敏稳定分析提供了有力的检测手段。

关键词：电沉积富集激光诱导击穿光谱水体重金属高灵敏稳定测量

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便携式激光诱导击穿光谱仪测定土壤中重金属

中国无机分析化学 2024年第2期14卷 145-152页

作者：马明俊方丽赵南京韩守炉陈富强时晨中国科学院合肥物质科学研究院安徽光学精密机械研究所环境光学与技术重点实验室合肥230031 中国科学技术大学合肥230026 安徽省环境光学监测技术重点实验室合肥230031 合肥学院生物食品与环境学院合肥230601 安徽大学物质科学与信息技术研究院合肥230601

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83.个不同基质土壤的光谱... 详细信息

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83.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6.3.%。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±3.%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。

关键词：激光诱导击穿光谱便携式土壤重金属现场检测

激光诱导击穿光谱(LIBS)法微损快速检测党参中Pb

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中国无机分析化学 2024年第2期14卷 162-167页

作者：陈富强方丽马明俊韩守炉时晨赵南京中国科学技术大学环境科学与光电技术学院合肥230026 中国科学院合肥物质科学研究院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室合肥230031 安徽省环境光学监测技术重点实验室合肥230031 合肥学院生物食品与环境学院合肥230601 安徽大学物质科学与信息技术研究院合肥230601

中药材重金属元素快速检测对污染监控及人们健康具有重要意义。激光诱导击穿光谱技术(Laser induced breakdown spectroscopy,LIBS)属于一种快速检测方法,研磨压片等预处理方法相对样品消解已有所简化,但破坏了样品的物理性质,且不能满... 详细信息

中药材重金属元素快速检测对污染监控及人们健康具有重要意义。激光诱导击穿光谱技术(Laser induced breakdown spectroscopy,LIBS)属于一种快速检测方法,研磨压片等预处理方法相对样品消解已有所简化,但破坏了样品的物理性质,且不能满足中药材大宗品种、大批量检测需求。若进一步简化样品预处理,将更加凸显LIBS快速检测的优势。采用Pb溶液浸泡法获得不同Pb含量的党参切片样品,依次获取Pb LIBS光谱强度,通过排序初步判断Pb含量高低,随机从各含量梯度样品中抽取样品,将其分为三份:3.个A样用于ICP-MS检测,建立定标曲线,从而获取B样和C样中Pb真实含量,10个B样作为Pb浓度已知的参考定标样品,用于待测党参样品中Pb微损检测,19个C样用于验证B样微损检测准确性。建立的微损定标曲线线性相关系数R^(2)为0.7764,可用于切片党参LIBS快速检测,对待测党参切片样品检测平均相对误差为3.74%,与电感耦合等离子体质谱(ICP-MS)法对比,相关系数R^(2)为0.7957,验证了LIBS技术微损检测的可行性。制备的党参参考定标样品可多次重复用于待测样定标和仪器标定等。实验对待测党参样品仅进行切片处理,避免了研磨、压片等预处理,更加充分地体现LIBS快速检测的优势,为LIBS技术应用于中药材重金属元素快检等领域提供了一种新方法。

关键词：激光诱导击穿光谱党参微损快速检测重金属

基于可变荧光统计法的藻类活体细胞密度宽范围检测实验

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光学学报 2024年第12期44卷 164-173页

作者：王勰殷高方赵南京胡翔黄朋马明俊徐敏甘婷婷杨瑞芳方丽张小玲王翔程钊中国科学技术大学安徽合肥230026 中国科学院合肥物质科学研究院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室安徽合肥230031 安徽大学物质科学与信息技术研究院信息材料与智能感知安徽省实验室安徽合肥230601 安徽工程大学电气工程学院安徽芜湖241200

提出区间增益系数动态调整的可变荧光统计学分布检测方法,以可变荧光统计分析法为基础,随机抽样测量,统计可变荧光值的方差σ^(2)。分析不同细胞密度样本的可变荧光值方差σ^(2)与区间增益系数a之间的关系,利用区间增益系数动态调整方... 详细信息

提出区间增益系数动态调整的可变荧光统计学分布检测方法,以可变荧光统计分析法为基础,随机抽样测量,统计可变荧光值的方差σ^(2)。分析不同细胞密度样本的可变荧光值方差σ^(2)与区间增益系数a之间的关系,利用区间增益系数动态调整方法准确测量宽细胞密度范围内的活体藻细胞密度。实验结果表明,该方法对羊角月牙藻细胞密度检测上限达到4640 cells·mL^(-1),较原始方法提高了近200倍;蛋白核小球藻、羊角月牙藻、斜生栅藻和杜氏盐藻检测结果与显微镜分析法的检测结果具有较高的一致性,相关系数R2均在0.999以上,相对误差绝对值均小于20.00%;直接测量楯形多甲藻与羊角月牙藻的混合藻种,检测结果与显微镜分析法的检测结果也具有较高的一致性,相对误差绝对值均小于20.00%。

关键词：海洋光学可变荧光活体藻细胞密度检测区间增益系数动态调整

Online calibration of laser-induced breakdown spectroscopy for detection of heavy metals in water

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Plasma.science and technology 2018年第9期20卷 127-132页

作者： Yao JIA mingjun Jianguo Nanjing ZHAO Li fang mingjun {3.Deshuo MENG Gaofang YIN LIU Wenqing UU Key Laboratory of Environmental Optics and technology Anhui Institute of Optics and Fine MechanicsChinese Academy of Sciences Hefei 230031 People's Republic of China university of science and technology of China Hefei 230026 People's Republic of China Key Laboratory of Optical Monitoring technology for Environment Hefei 230031 People's Republicof China

In order to reduce the fluctuation of LIBS detection spectrum of liquid sample,the full-spectrum sum method and the internal standardization method is adopted,using an equal-RSD norma.ization algorithm to calibrate the detection *** result shows that the full-spectrum sum method reduced the RSD of parallel samples of Cd and Cr to 9.4% and 11.06% from 28.3.% and 3..93. respectively,yielded better overall calibration than the singleelement internal standardization approach,thereby suggesting that the former method is convenient and effective for online calibration of LIBS for detection of aqueous heavy metals.

关键词： LIBS aqueous heavy metals spectroscopic stability spectral calibration full-spectrum sum method equal-RSD norma.ization algorithm

Detection of heavy metals in water samples by laser-induced breakdown spectroscopy combined with annular groove graphite flakes

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Plasma.science and technology 2019年第3期21卷 16-22页

作者： Li fang Nanjing ZHAO mingjun ma.Deshuo MENG Yao JIA Xingjiu HUANG Wenqing LIU Jianguo LIU Key Laboratory of Environmental Optics and technology Anhui Institute of Optics and Fine MechanicsChinese Academy of Sciences Key Laboratory of Optical Monitoring technology for Environment university of science and technology of China Institute of Intelligent ma.hines Chinese Academy of Sciences

The use of laser-induced breakdown spectroscopy(LIBS) for the analysis of heavy metals in water samples is investigated. Some factors such as splashing, surface ripples, extinction of emitted intensity, and a shorter plasma.lifetime will influence the results if the water sample is directly measured. In order to avoid these disadvantages and the ‘coffee-ring effect', hydrophilic graphite flakes with annular grooves were used for the first time to enrich and concentrate heavy metals in water samples before being analyzed by LIBS. The proposed method and procedure have been evaluated to concentrate and analyze cadmium, chromium, copper, nickel, lead,and zinc in a water sample. The correlation coefficients were all above 0.99. The detection limits of 0.029, 0.087, 0.012, 0.083. 0.125, and 0.049 mgl^(-1) for Cd, Cr, Cu, Ni, Pb, and Zn,respectively, were obtained in samples prepared in a laboratory. With this structure, the heavy metals homogeneously distribute in the annular groove and the relative standard deviations are all below 6%. This method is very convenient and suitable for online in situ analysis of heavy metals.

关键词： laser-induced breakdown spectroscopy quantitative analysis heavy metals graphite flake

A Hu sheep genome with the first ovine Y chromosome reveal introgression history after sheep domestication

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science China(Life sciences) 2021年第7期64卷 1116-1130页

作者： Ran Li Peng Yang Ming Li Wenwen fang Xiangpeng Yue Hojjat Asadollahpour Nanaei Shangquan Gan Duo Du Yudong Cai Xuelei Dai Qimeng Yang Chunna Cao Weidong Deng Sangang He Wenrong Li Runlin ma.mingjun Liu Yu Jiang Key Laboratory ofAnima. Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China State Key Laboratory of Grassland Agro-ecosystems Key Laboratory of Grassland Livestock Industry InnovationMinistry of Agriculture and Rural AffairsEngineering Research Center of Grassland IndustryMinistry of EducationCollege of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730020China State Key Laboratory of Sheep Genetic Improvement and Healthy Production Xinjiang Academy of Agricultural and Reclamation SciencesShihezi 832000China Faculty of Anima. science and technology Yunan Agricultural UniversityKunming 650201China Key Laboratory of Genetics Breeding and Reproduction of Grass feeding Livestock Ministry of AgricultureAnimal Biotechnology Research InstituteXinjiang Academy of Animal ScienceUrumqi 830026China State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China

The Y chromosome plays key roles in ma.e fertility and reflects the evolutionary history of paternal ***,we present a de novo genome assembly of the Hu sheep with the first draft assembly of ovine Y chromosome(o MSY),using nanopore sequencing and Hi-C *** o MSY that we generated spans 10.6 Mb from which 775 Y-SNPs were identified by applying a large panel of whole genome sequences from worldwide sheep and wild Iranian *** ma.or paternal lineages(HY1a,HY1b and HY2)were defined across domestic sheep,of which HY2 was newly ***,HY2 forms a monophyletic clade with the Iranian mouflons and is highly divergent from both HY1a and *** analysis of Y chromosomes,mitochondrial and nuclear genomes confirmed that HY2 and the ma.ernal counterpart of lineage C represented a distinct wild mouflon population in Iran that diverge from the direct ancestor of domestic sheep,the wild mouflons in Southeastern *** results suggest that wild Iranian mouflons had introgressed into domestic sheep and thereby introduced this Iranian mouflon specific lineage carrying HY2 to both East Asian and Africa sheep populations.

关键词： Y chromosome sheep paternal lineage introgression de novo assembly

Characteristics of optical emission during laser-induced dama.e events of fused silica

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Chinese Optics Letters 2019年第12期17卷 92-97页

作者： Chao Shen Nanjing Zhao Jaka Pribosek mingjun ma.Li fang Xingjiu Huang Yujun Zhang Key Laboratory of Environmental Optics&technology Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031China Key Laboratory of Optical Monitoring technology for Environment Hefei 230031China Carinthian Tech Research 9524 VillachAustria Institute of Intelligent ma.hines Chinese Academy of SciencesHefei 230031China State Key Laboratory of Pulsed Power Laser technology National University of Defense TechnologyHefei 230037China

Spontaneous optical emission properties of laser-produced plasma.during laser dama.e events at input and exit surfaces of fused silica were retrieved and *** show that plasma.at the input surface is much larger in size and exhibits significantly higher electron number density and excitation temperature,even when sma.ler laser energy was *** effect was attributed to the stronger laser–plasma.coupling at the input *** addition,a strong continuum background containing three peaks at 1.3.V,1.9eV,and 2.2eV was observed at the exit surface,and possible origins for this effect are also discussed.

关键词： laser optical surface.

基于LIBS技术的水体重金属连续在线检测方法

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中国激光 2018年第6期45卷 270-275页

作者：贾尧赵南京刘文清方丽马明俊孟德硕中国科学院安徽光学精密机械研究所环境光学与技术重点实验室安徽合肥230031 中国科学技术大学安徽合肥230026 安徽省环境光学监测技术重点实验室安徽合肥230031

针对工业废水重金属原位在线监测的需求,提出了基于激光诱导击穿光谱(LIBS)技术的水体重金属连续在线检测方法。采用石墨基底蒸干的富集方式,通过研究样液富集模式、样液定量添加方式、样液蒸干富集方式等,实现了水体中重金属元素的快... 详细信息

针对工业废水重金属原位在线监测的需求,提出了基于激光诱导击穿光谱(LIBS)技术的水体重金属连续在线检测方法。采用石墨基底蒸干的富集方式,通过研究样液富集模式、样液定量添加方式、样液蒸干富集方式等,实现了水体中重金属元素的快速自动检测,提高了检测效率和检测能力。对含有Cd、Cr、Cu、Ni、Pb、Zn重金属元素的不同质量浓度的标准溶液进行检测,分别建立了这6种元素的定标曲线,并得到了相应的检测限。多次测量光谱强度相对标准偏差分别为9.24%、10.45%、12.59%、11.58%、15.24%、6.87%,检测限分别为0.03.0.012,0.0047,0.03.,0.071,0.03.6mg/L。该方法为水体重金属的在线监测提供了一种有效手段。

关键词：光谱学环境监测激光诱导击穿光谱水体重金属在线稳定性检测限