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Application of ultrasonic to speciation analysis of heavy metals in soil

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Journal of Environmental Sciences 2004年第6期16卷 957-961页

作者： SUNFu-sheng ZHANZhong-ying ZHANGKun-song WANGYi DepartmentofEnvironmentalScienceandEngineering UniversityofScienceandTechnology＂ofSuzhouSuzhou215011China

In order to reduce the operation time and improve the extraction efficiency, ultrasonic energy by means of ultrasonic bath was used to the modified Tessier sequential extraction for speciation analysis of heavy metals in soil. Extractable contents of Cu, Fe, Mn, Ni, Pb and Zn were measured by atomic absorption spectroscopy(AAS). The merit of the ultrasonic extraction(UE) applied to the modified Tessier method is not only that the operation time for the first 4 fractions was reduced from ca.18 h to 8 h, comparing with conventional extraction(CE), but also the extraction efficiency was higher. The results for both of UE and CE were consistent. The extractable Cu, Ni and Zn in the sample No.1 were mainly associated with the third fraction(Fe-Mn oxides fraction), and fourth fraction(organic matter fraction) in the sample No.2. The extractable Fe and Mn were all mainly associated with the third fraction, and Pb the fourth fraction in both of the samples. The effects of concentration of hydroxylamine chloride on the capability for the extraction of studied metals were also studied.

关键词： speciation analysis heavy metal sequential extraction ultrasonic extraction soil atomic absorption spectrometry

毛细管电泳-电感耦合等离子体质谱法测定地下水中不同形态的砷

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分析化学 2013年第11期41卷 1780-1781页

作者：韩梅赵国兴李淑珍孙振华李义贾娜中国地质科学院水文地质环境地质研究所河北省环境地质勘察院

1引言目前砷形态分析主要采用液相色谱(HPLC)分离与电感耦合等离子体质谱(ICP-MS)、原子荧光光谱(AFS)、以及原子吸收光谱(AAS)等联用技术[1]。与HPLC分离技术相比,毛细管电泳(CE)具有分离效率高、样品消耗少、分析速度快的优点[2],而IC... 详细信息

1引言目前砷形态分析主要采用液相色谱(HPLC)分离与电感耦合等离子体质谱(ICP-MS)、原子荧光光谱(AFS)、以及原子吸收光谱(AAS)等联用技术[1]。与HPLC分离技术相比,毛细管电泳(CE)具有分离效率高、样品消耗少、分析速度快的优点[2],而ICP-MS具有元素特异性检测以及检出限极低的优势。因此,CE与ICP-MS联用成为进行包括砷在内的元素形态分析的强有力分析工具。本实验采用CE进行不同砷形态的分离,并与ICP-MS联用,实现了水样中砷形态的测定。

关键词： Capillary electrophoresis Inductively coupled plasma mass spectrometry speciation analysis Arsenic Groundwater

Study of heavy metal speciation in branch sediments of Poyang Lake

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Journal of Environmental Sciences 2008年第2期20卷 161-166页

作者： LUO Mingbiao LI Jianqiang CAO Weipeng WANG Maolan Applied Chemistry Department East China Institute of Technology Jiangxi 344000 China The Key Lab of Poyang Lake Ecology and Bio.resource Utilization Ministry of Education Nanchang 330000 China

This study concentrates on the environmental pollution level of sediments in the six branches of Poyang Lake, the biggest fresh water lake in China. This is the first systematic report on the speciation analysis of heavy metals （Cu, Co, Cd, Pb, and Ni） in the six branches of the lake. A reported analytical procedure involving a five-step sequential extraction is used for the partition of particulating heavy metals. The sediment samples are analyzed using flame atomic absorption spectroscopy （FAAS）. Experimental results obtained from five replicate samples of fluvial bottom surface sediments at the sampling points demonstrated that the relative standard deviation of the sequential extraction procedure was generally better than 10% （Cd except）. The average extracted contents of the five elements, analyzed after all five steps, are found to be （mg/kg） for Cu： 26.89, Co： 16.25, Cd： 1.08, Pb： 37.98, and Ni： 20.46. The content of the exchangeable species was generally lower. Except Cu, the percentage of the species bond to organic matter was lower than 20%. The fractions containing the most metal for Cu, Co, and Ni were the residues （52.26%, 45.28%, and 74.82%, respectively）.

关键词： Poyang Lake speciation analysis heavy metal sequential extraction

Selenium nanoparticles in aquaculture:Unique advantages in the production of Se-enriched grass carp(Ctenopharyngodon idella)

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Animal Nutrition 2024年第1期16卷 189-201页

作者： Chao Zhu Zifang Wu Qimin Liu Xiaolin Wang Lijuan Zheng Shuyang He Fangxia Yang Hong Ji Wuzi Dong College of Animal Science and Technology Northwest A&F UniversityYanglingShaanxi712100China College of Forestry Northwest A&F UniversityYanglingShaanxi712100China Biology Research Centre of Qin Mountains Wildlife Northwest A&F UniversityYanglingShaanxi712100China

The production of selenium-enriched fish can contribute to alleviating selenium deficiency in human ***,it is still unclear which selenium source,as an additive,can efficiently and costeffectively produce high-quality selenium-enriched *** study evaluated the effects of selenium nanoparticles(SeNP),selenite,and selenomethionine(SeMet)on the growth,antioxidant capacity,selenium content,selenium speciation,and meat quality of grass *** diets were prepared,including a basal diet(BD)and three concentrations(0.1,0.3,and 0.9 mg/kg)of SeNP,selenite,and SeMet.A total of600 fish(250.79±1.57 g)were randomly assigned to 30 tanks(3 tanks/group).Fish were fed the experimental diet three times daily for 60 *** this study,SeNP most significantly promoted the growth and antioxidant capacity of grass carp,with 0.3 mg/kg SeNP identified as the optimal additive ***,SeNP demonstrated equally excellent bioavailability as SeMet and significantly increased the content of SeMet in grass carp(Ctenopharyngodon idella)***,compared to SeMet and selenite,dietary SeNP could more significantly enhance the content of selenocysteine(SeCys2)and methylselenocysteine(MeSeCys)in grass carp muscle *** addition,we have demonstrated that SeCys2and MeSeCys promote apoptosis of cancer cells(HeLa)through the mitochondrial apoptotic pathway(involving Bax and Bcl-2).Furthermore,as an additive,0.3 mg/kg SeNP significantly improved the flesh quality of grass carp by reducing crude fat and heavy metal content,as well as increasing the levels of eicosapentaenoic acid(EPA)and docosahexaenoic acid(DHA)and the ratio of n-3/n-6 polyunsaturated fatty acid(PUFA).In summary,SeNP is the most suitable additive for producing selenium-enriched fish.

关键词： Selenium nanoparticle speciation analysis Grass carp Selenium additive

Advances in selenium supplementation:From selenium-enriched yeast to potential selenium-enriched insects,and selenium nanoparticles

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Animal Nutrition 2023年第3期14卷 193-203页

作者： Luca Ferrari Donata M.I.R.Cattaneo Rossella Abbate Michele Manoni Matteo Ottoboni Alice Luciano Christoph von Holst Luciano Pinotti Department of Veterinary Medicine and Animal Sciences(DIVAS) Universita degli Studi di Milano26900 LodiItaly European Commission Joint Research Centre(JRC)2440 GeelBelgium CRC I-WE(Coordinating Research Centre:Innovation for Well-Being and Environment) Universita degli Studi di Milano20133 MilanItaly

Selenium(Se)is an essential micronutrient that plays an important role in animal and human development and physiological *** review surveys the role of Se in the environment,plants and animal bodies,and discusses data on Se biofortification with different sources of supplementation,from inorganic to organic forms,with special focus on Se-enriched yeast(Se-yeast).Although Se-yeast remains one of the main sources of organic Se,other emerging and innovative sources are reviewed,such as Se-enriched insects and Se-nanoparticles and their potential use in animal ***-enriched insects are discussed as an option for supplying Se in organic form to livestock ***-nanoparticles are also discussed,as they represent a more biocompatible and less toxic source of inorganic Se for animal organisms,compared to selenite and *** also provide up to date information on the legal framework in the EU,USA,and Canada of Se that is contained in feed *** the scientific evidence available in the literature,it can be concluded that among the inorganic forms,sodium selenite is still one of the main options,whereas Se-yeast remains the primary organic ***,other potential sources such as Se-enriched insects and Se-nanoparticles are being investigated as they could potentially combine a high bioavailability and reduced Se emissions in the environment.

关键词： Selenium Selenium-enriched yeast Selenium nanoparticle Selenium-enriched insect speciation analysis

Chemical degradation of platinum oncolytics in urine and speciation of the inorganic contaminants cisplatin and carboplatin relevant in waste water

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Emerging Contaminants 2024年第1期10卷 47-53页

作者： Karel Folens Janis Baeten Karen Couvreur Gijs Du Laing Laboratory of Analytical Chemistry and Applied Ecochemistry(ECOCHEM) Department of Green Chemistry and TechnologyGhent UniversityFrieda Saeystraat 19052ZwijnaardeBelgium Center for Microbial Ecology and Technology(CMET) Department of BiotechnologyGhent UniversityCoupure Links 6539000GentBelgium Medical Oncology AZ GlorieuxGlorieuxlaan 559600RonseBelgium

Understanding the prevalent form of platinum(Pt)based antineoplastic agents,used in chemotherapy,is of importance to develop a remediation strategy that restricts aquatic *** speciation of Pt-based compounds was measured in actual patients’urine using hydrophobic interaction liquid chromatography(HILIC)equipped with an ICP-MS *** showed poor metabolization and intact excretion 11 h after administration,whereas cisplatin underwent a rapid aquation in the first 7 *** compare,the in vitro degradation rate of cisplatin,carboplatin and oxaliplatin was determined in synthetic human urine,mimicking true environmental *** fraction of intact molecules was measured at regular intervals following incubation at 37°C,resulting in degradation rate *** chemical stability was highest for carboplatin(k=0.0143±0.0012 min−1),versus faster degradation of oxaliplatin and cisplatin by exponential decay with k1 of 0.0026±0.0001 min−1 and k_(2)=5.59±0.46×10^(−6) min−1,*** kinetic parameters can serve as input to further expand modelling databases and improve the predictive power of speciation software to estimate eco-toxicity *** the strong residual cytotoxicity of the platinum antineoplastic molecules following renal clearance and human excretion,the contaminants are of high environmental concern and offer potential for metal recovery using advanced treatment *** such water treatment processes,especially carboplatin,above all cancerostatic platinum compounds,should be addressed since it is more persistent in the aquatic environment.

关键词： Pharmaceuticals Inorganic contaminants speciation analysis Ecotoxicity

Studies on the Simultaneous Determination of Cr(Ⅲ)and Cr(Ⅵ)by Ion Chromatography(IC)

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Asian Agricultural Research 2017年第5期9卷 56-62页

作者： Guangmin LIU Xin LIU Feng GAO Na SUN Liping HU Yaqin WANG Hongju HE Vegetable Research Center of Beijing Academy of Agriculture and Forestry Sciences Beijing 100097China Key Laboratory of Urban Agriculture(North China) Ministry of AgricultureBeijing 100097China Beijing Entry-Exit Inspection and Quarantine Bureau Beijing 100026China

The research aimed to develop and validate an ion chromatography method for the simultaneous analysis of Cr(Ⅲ) and Cr(Ⅵ)from pumpkin. A new analytical method based on ion chromatography techniques was developed by the Cr(Ⅲ) pre-column derivatization and Cr(Ⅵ) post-column derivatization. The ion chromatography condition was optimized and the detection sensitivity was improved. Cr(Ⅲ) and Cr(Ⅵ) were determined by 365 and 530 nm,respectively. The temperature of water bath,the heating time for pre-column derivatization,and the flow rate of post-column derivative liquid were screened on the basis of single factor experiment,the effects of various factors were determined by the method of L16( 43) orthogonal experiment design. Considering the results of orthogonal experiments and the variation tendency of peak area under different factors,the optimum derivatization conditions were chose as follows: the flow rate of post-column derivative liquid is0. 5 m L/min,the temperature of water bath for pre-column derivatization is 100 ℃ and the heating time is 5 min. The conditions were optimized by means of orthogonal experiments under the p H of leacheate ranged from 6. 5 to 6. 8 and the I-concentration of 5 mmol/L. Under optimized derivatization conditions,the detection limits for Cr(Ⅲ) and Cr(Ⅵ) were 0. 17 and 0. 019 mg,respectively. And the average recoveries of Cr(Ⅲ) in pumpkin were in the range of 82%-85%. Results indicated that pumpkin does not contain Cr(Ⅵ) according to this ion chromatography method of simultaneously determination for Cr(Ⅲ) and Cr(Ⅵ).

关键词： Pumpkin Cr speciation analysis Ion chromatography