MICROCHEMICAL JOURNAL
·
2018
·
IF 2.746
Huimin Yu,Huan Du,Li Wu,Ruolin Li,Qun Sun,Xiandeng Hou
The speciation analysis of arsenic (As) has always received great attention, in which the analysis of complex matrix samples remains challenging, mainly manifested in selection of suitable sample pretreatment methods and sensitive analytical spectrometers. In this work, microwave-assisted extraction of total As and various As species in bones, with their respective determination by ICP-MS and HPLC-ICP-MS, was studied, and was successfully utilized to determine As species in panda and pig bones. The results reveal the content of As ranging from 28 to 75 μg g −1 in the panda bone samples and 0.27 μg g −1 in pig bone, in which >90% is inorganic As V except for little As III and organic As. The method could be applicable to the analysis of diverse bone samples.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL LETTERS
·
2018
·
IF 1.206
Ziwei Li,Dongming Han,Mingchuan Wang,Yuexin Zhang,Yang Wang,Xiufeng Yan,Qiuying Pang
This study aimed to develop a precise and accurate method of sample preparation of Auricularia auricula for inductively coupled plasma-optical emission spectrometry-based trace element determination and to compare concentrations of seven trace elements (Mg, Fe, Mn, Zn, Ni, Cr, Sr) in six A. auricula samples belonging to three varieties with two cultivation substrates. Five sample preparation procedures, microwave-assisted digestion, nitric acid digestion with hot plate heating, nitric acid and perchloric acid digestion with hot plate heating, nitric acid digestion with ash content, and aqua regia digestion with ash content, were compared. The performance of the procedures was determined based on the precision and accuracy of the results and the limits of detection of the elements. The best results, with limits of detection of 0.60–6.60 ng · mL−1 and recoveries for spiked samples between 93.80 and 105.00%, were found using nitric acid digestion with ash content. Six A. auricula samples were analyzed using the proposed procedure. Among the tested elements, the concentration of Fe was highest in all six A. auricula samples up to a maximum concentration of 284.83 µg · g−1. The concentrations of Mn, Cu, and Ni increased in mixed stands (basswood, birch, and mongolica) compared with pine sawdust cultivation.
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2022
·
IF 2.799
Qingxia Ye,Zhen Li,Jin Liu,Di Wang,Ping Wang,Xianbiao Wang,Xianhai Hu
In this paper, the application of zone smelting to remove the trace heavy metal lead from waste acrylonitrile-butadiene-styrene (wABS) plastics was investigated. ABS standard samples with uniform and stable lead content were prepared by the method of lead stearate coupling agent. The structure, thermal stability, morphology and lead content of the standard ABS samples before and after zone smelting were characterized by FTIR, DSC, SEM and ICP-AES. The results showed that the lead content in the front and middle sections of the ABS sample decreased obviously after zone smelting, while the lead content in the tail increased significantly, and the structure, thermal stability and morphology remained basically unchanged.
研究领域:
材料科学
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环境工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Xiao Chaoqiang,Zhu Li,Zhang Xia,Gao Rumeng,He Shuwang,Lv Zhihua,Hu Changqin
Calcium carbonate which is extracted from the Earth in combination with other mineral impurities, is largely used in preparations for pediatric supplements. Elemental impurities in drug products pose toxicological concerns without therapeutic benefits. Thus, it is very urgent to assess the safety of chronic exposure to elements that may be present in trace amounts. In the present study, we developed high throughput ICP-MS method for the quantitative determination of 62 elemental impurities in high matric calcium carbonate samples and validated according to USP 233. Calcium carbonate preparations which state clearly used for child (including neonates, infants, toddlers and children) from 9 manufactures and two types of raw materials (light calcium carbonate and ground calcium carbonate) were investigated in terms of the content and variability of 62 elemental impurities. According to the results, ground calcium carbonate was more suitable to be used in pediatric preparations concerning elemental impurities. Parts of elemental impurities in CaCO3 preparations which are derived from the raw materials and the preparation process, may cause potential risks for children. These results indicate that it is necessary to establish a modern instrumental analysis method to evaluate and control elemental impurities in CaCO3 raw materials and preparations.
研究领域:
药学
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毒理学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2015
·
IF 1.03
Xiaojun Wang,Jingjing Chen,Ying Zhou,Xiaoyi Liu,Hongzhou Yao,Farooq Ahmad
A rapid and novel two-step dispersive liquid–liquid microextraction and dispersive micro-solid phase extraction method was established for the separation and enrichment of trace cadmium, nickel, and copper in food and environmental water prior to determination by inductively coupled plasma-mass spectrometry (ICP-MS). In the first microextraction step, carbon tetrachloride was employed to extract metal-diethyldithiocarbamate chelates from aqueous solution with ultrasound. In the following step, Fe3O4 magnetic nanoparticles were added and used to collect the analytes in the organic solvent. The sample pH, type and volume of extraction solvent, mass of magnetic nanoparticles, concentration of the chelating agent, concentration of sodium chloride, and sonication time were optimized. The linear dynamic range was from 0.01 to 20 micrograms per liter with correlation coefficients between 0.9990 and 0.9992. Enrichment factors were 78, 79, and 81 for cadmium, nickel, and copper, respectively. The limits of detection for cadmium, nickel, and copper were 0.007, 0.009, and 0.017 micrograms per liter, with relative standard deviations from 1.1 to 2.6 percent. The developed method was validated by the determination of cadmium, nickel, and copper in rice and mussel certified reference materials, food, and environmental water with satisfactory results.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Yafei Zhen,Tao Lin,Hanjiao Chen,Jing Hu,Xiandeng Hou
This technical note reports for the first time the simultaneous vapor generation of 16 rare-earth elements (REEs) via reaction with sodium tetrahydroborate (THB). Significant improvement in REE vapor generation efficiency was discovered in the presence of arsenazo III (ARS). Subsequent to a critical evaluation on the impacts of various experimental variables, including the concentrations of acids, THB, and ARS, blank-limited (reagent contamination and impurity from ARS) detection limits (LODs) in the range of 0.004–0.15 μg L–1 were achieved based on three times the standard deviation of the method blank by the proposed vapor generation inductively coupled plasma mass spectrometry (ICP-MS). The nature of released REE species was studied by various approaches and identified to be REE nanoparticles and REE-ARS chelates; a dual-route mechanism for the vapor generation of REEs was thereby proposed.
研究领域:
分析化学
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Long Zhang,Haonan Liu,Qi Xin,Lijuan Tang,Jie Tang,Yin Liu,Le Hu
Concerns regarding the environmental hazards and health risks of nanoplastics (NPs) are increasing. However, quantifying of NPs in vivo remains challenging. In this study, we propose a strategy for using magnetic resonance imaging (MRI) to quantify NPs internalized by mouse macrophages. Model NPs (Fe 3 O 4 @PS) with more homogeneous sizes and morphologies were obtained by encapsulating Fe 3 O 4 in polystyrene . A standard curve was generated by linearly fitting the intensity and concentration charts to the Fe 3 O 4 @PS MRI data. The mass of Fe 3 O 4 @PS captured by the mouse macrophages was estimated using a standard curve. An explanation of how the standard curves were created and used is provided in the text. The accuracy of the MRI results was demonstrated using, inductively coupled plasma (ICP). Quantitative results from MRI and ICP revealed that the mouse macrophage uptake increased as NPs concentrations decreased. According to the ICP results, when the NPs exposure concentration was 10 μg/mL, the uptake rate by mouse macrophages was 63.0 %. The quantitative MRI results were slightly lower than those for ICP, with an uptake rate of 57.7 % in mouse macrophages at the same concentration. Therefore, MRI provides a new perspective for quantitative NPs analysis.
研究领域:
环境科学
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医学影像
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2016
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IF 4.052
Li Ma,Zhaoguang Yang,Qian Kong,Lin Wang
Extraction of arsenic (As) species in leafy vegetables was investigated by different combinations of methods and extractants. The extracted As species were separated and determined by HPLC-ICP-MS method. The microwave assisted method using 1% HNO 3 as the extractant exhibited satisfactory efficiency (>90%) at 90 °C for 1.5 h. The proposed method was applied for extracting As species from real leafy vegetables. Thirteen cultivars of leafy vegetables were collected and analyzed. The predominant species in all the investigated vegetable samples were As(III) and As(V). Moreover, both As(III) and As(V) concentrations were positive significant ( p < 0.01) correlated with total As (tAs) concentration. However, the percentage of As(V) reduced with tAs concentration increasing probably due to the conversion and transformation of As(V) to As(III) after uptake. The hazard quotient results indicated no particular risk to 94.6% of local consumers. Considerably carcinogenic risk by consumption of the leafy vegetables was observed.
研究领域:
环境科学
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食品安全
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Zhongtang Wang,Zhaoya Huang,Yun Xie,Zhaoyi Tan
Plutonium has been extensively studied in the environment, for the purpose of radiological assessment, environmental behavior study and nuclear emergency response. To determine Pu isotopes in environmental soil and sediment, a novel analytical method was established in this study using a new type of extraction resin, TK200 resin. Firstly an investigation was performed to study the extraction behaviors of Pu, U, Th, Hg, Tl, Pb, Bi and Hf on TK200 resin. On the basis of the results, a new chromatographic procedure was then proposed to separate Pu from the elements that interfere the accurate determination of Pu isotopes by mass spectrometry. Owing to the excellent separation efficiency between Pu and interfering elements (IEs) of the developed procedure, high decontamination factors (DFs) were obtained for IEs, e.g. the DF(U) (>7.5 × 10 7 ) was the highest reported value. The separation procedure was finally combined with HNO 3 leaching, CaF 2 /LaF 3 coprecipitation and sector field-inductively coupled plasma mass spectrometry (SF-ICPMS) measurement to establish a complete method. The established method was evaluated by analyzing four standard reference materials (soil, sediment), and the results showed that both 239+240 Pu activity and 240 Pu/ 239 Pu isotopic ratio were accurately determined, with stable and high Pu chemical recoveries (81–91%). The whole analytical method only took about 15 h, and the limits of detection were calculated to be 0.13–0.24 fg g −1 for Pu isotopes (for 2 g soil or sediment), guaranteeing the rapid determination of ultra-trace level Pu in soil and sediment samples.
研究领域:
环境科学
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核化学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Dandan Wang,Bowen Yang,Yuxuan Ye,Weiming Zhang,Zhongbo Wei
The electroless nickel (EN) industry has suffered from the reduction in Ni concentration to lower than 0.1 mg/L. Hence, Ni speciation along a typical sequential treatment scheme has important implications to optimize the design of advanced treatment. For the first time, we revealed the Ni speciation in segmented EN outfall effluents by virtue of multiple analytical methods. After ensuring all the Ni-bearing complexes were completely dissolved by size-fractioned ultrafiltration trials, customized mass spectra analysis was conducted. In a series of ICP-MS assays, the potential polyatomic interfering species was primarily excluded. The chromatography hyphenated IC-ICP-MS and SEC-ICP-MS results demonstrated that the dominant Ni species in the EN effluents was similar to EDTA-Ni but with a smaller size. The LC-MS experiment further distinguished several typical Ni-bearing complexes. Although Ni concentration declined continuously along the treatment scheme, the number of detected Ni-bearing complexes gradually increased but with lower molecular weights . Most of the detected mononuclear complexes had higher indexes of hydrogen deficiency (IHD) than EDTA-Ni, whereas it was believed that the similar stereo ring shape was widespread in the EN effluent. Considering the efficient Ni decrease after the Fenton unit, further post-treatment approaches featuring higher active radical yields were suggested.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2022
·
IF 2.731
Quan Zeng,Ting Xu,Qinshu Kang,Shengqing Li
The existence of inorganic elements in natural water is heterogeneous due to the suspended micro colloidal and nanoparticles. In this work, the signals of Fe, Cu, Cd, Pb content in natural water samples collected from a city lake were examined using the single-particle inductively coupled plasma mass spectrometry (ICP-MS) under the time resolved detection mode. Total numbers, data distributions and central values of the detected signals were obtained based on statistical analysis using the Excel and the Origin software. Both fractionation filtration (0.22, 0.45 and 3.0 µm membranes) and centrifugation (2000, 4000, 6000 and 8000 rpm rotating speed) have a significant effect on the detection of metals coexisted in the natural colloidal particles (NCPs) in water. Notable number of single-particle signals still presents in the lake water samples even after the pretreatment of 0.22 µm filtration or 8000 rpm centrifugation, which reveals the ubiquitous existence of micro aggregates or colloids in natural water. Sampling with online dilution is proved to be a direct, simple and effective method for the implementation of time resolved analysis of metallic micro NCPs in lake water by ICP-MS, especially for elements with high dissolved concentration. The results enhance the knowledge of how-to evaluation of the quantity and chemical stability of metal-containing aggregates, colloids and nanoparticles that may exist in natural water.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 316
·期 1
·411-417
·
IF 1.181
Wang Zhongtang,Wen Wei,Quan Wei,Du Liang,Wang Ping,Lin Jinxian,Xie Yun,Tan Zhaoyi
Plutonium is one of the key radionuclides in nuclear decommission. In this study, a rapid method was developed to analyze Pu for concrete samples using total digestion, CaF 2 /LaF 3 coprecipitation, extraction chromatography using TEVA and DGA resins, and ICP-MS measurement. The whole analytical process can be achieved within 2 days, with sufficiently high decontamination factors of interfering elements and high Pu chemical recovery (57–93%). The high throughput (22 samples/2 days) and low LODs (0.008 mBq g −1 for 239 Pu and 0.02 mBq g −1 for 240 Pu) allow this method to effectively detect low level Pu contamination in concrete samples.
研究领域:
分析化学
·
核科学与技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）