Analytical Methods
·
2015
·Vol. 7
·期 6
·2653-2658
·
IF 1.821
Jing Sun,Zhaoguang Yang,Hsiaowan Lee,Lin Wang
The simultaneous separation and determination of As(III), As(V), monomethylarsenic acid (MMA), dimethylarsenic acid (DMA), Cr(III), Cr(VI) and Cd(II) in water samples have been carried out by anion exchange liquid chromatography with inductively coupled plasma mass spectrometry. Ethylenediaminetetraacetic acid was used to form negatively charged complexes with Cr(III) and Cd(II). For achieving the optimum chromatographic conditions, the effects of competing ion type, mobile phase concentration and pH on speciation have been investigated. By compromising among analysis time, chromatographic resolution and sensitivity, 40 mM ammonium nitrate at pH 8.6 has been selected as the mobile phase for real sample applications. The baseline separation of all the target species has been achieved under isocratic elution conditions. Under the optimized conditions, the limit of detection was in the range of 0.07–0.12 μg L−1 for the various species. The proposed method was applied to the determination of the target species in surface water and drinking water samples. Arsenate was the dominant arsenic species in all the tested samples. Neither MMA nor DMA was detected in real water samples. The recoveries for spikes of individual species in water samples tested ranged from 88% to 116%.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 328
·期 1
·137-147
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IF 1.371
Wang Zhongtang,Xie Yun,Lin Jinxian,Li Zejun,Tan Zhaoyi
New method was developed to analyze Pu and Am sequentially for soil and sediment by inductively coupled plasma mass spectrometry (ICPMS). The developed method uses conc. HNO 3 to leach Pu and Am, Fe(OH) 3 coprecipitation to remove alkali and alkaline metals, extraction chromatographic separation using UTEVA, DGA and TEVA resins to remove interfering elements (IEs) and separate Pu and Am from each other, and sector field-ICPMS to measure Pu and Am. The analysis of four standard reference materials showed that both Pu isotopes and 241 Am were accurately determined by this method, as a result of its excellent decontamination ability of IEs. Especially the high decontamination factor of Pu [DF(Pu), 4.2 × 10 2 ] in Am fraction and high DF(Am) (7.0 × 10 3 ) in Pu fraction sufficiently eliminated the cross interference between 241 Pu and 241 Am in ICPMS measurement. In addition, stable and high chemical recoveries were achieved for Pu (71–91%) and Am (70–88%). The low LODs of Pu isotopes, short analytical time (14 h) and high DFs of IEs allows this method to sequentially analyze Pu and Am, for both global fallout and nuclear accident sourced samples.
研究领域:
环境科学
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分析化学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Tao He,Zhaochu Hu,Wen Zhang,Haihong Chen,Yongsheng Liu,Zaicong Wang,Shenghong Hu
In this study, a simple and effective method for the simultaneous analysis of Cl, Br, and I in geological materials based on NH4HF2 digestion in open vessels (Savillex Teflon vials) is proposed. It is very interesting to note that Cl, Br, and I are not lost during NH4HF2 digestion at temperatures of 200–240 °C for 0.5–12 h in open vessels. This should be related to the alkaline atmosphere environment caused by the NH3 produced during NH4HF2 digestion, which suppresses the volatilization loss of Cl, Br, and I. A 100 mg sample of geological materials can be completely digested by using 400 mg of NH4HF2 at 220 °C for 2 h in Savillex Teflon vials. The use of new Savillex Teflon vials significantly reduced the procedural blanks of halogens compared with the old Savillex Teflon vials. The developed method was successfully applied to the simultaneous determination of Cl, Br, and I in a series of international geological reference materials. Most of the results were found to be in reasonable agreement with values reported in the literature. This simple, rapid, effective, and economical analytical method will significantly promote the development of halogen geochemistry.
研究领域:
地球化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2019
·
IF 4.916
Danyu Zhang,Shiwei Yang,Heyong Cheng,Yuanchao Wang,Jinhua Liu
Multi-elemental speciation analysis in a single run reduces costs, waste and time, and also sample consumption, which is favorable to a large set of instable samples. This work demonstrates mercury and arsenic speciation in a single run using high performance liquid chromatography with inductively coupled plasma mass spectrometric detection (HPLC/ICP-MS). Thiol compounds in mobile phases interfered with the elution of arsenite because of coordination action, which was overcome by gradient elution (elution of As(III) by thiol-free mobile phases at first). Four arsenic forms (As(III), DMA , MMA and As(V)) and three mercury species (Hg(II), MeHg and EtHg) were separated and detected by HPLC/ICP-MS using 4 mM tetrabutylammonium hydroxide (TBAH) (pH 6.0) in the first 1.0 min and 4 mM TBAH + 20 mM L -cysteine (pH 6.0) in the next 9.0 min. The detection limits were obtained at 0.078 for As(III), 0.081 for DMA, 0.078 for MMA and 0.15 μg L −1 for As(V), and 0.016 for Hg(II), 0.027 for MeHg and 0.032 μg L −1 for EtHg, and the reproducibilities (50 μg L −1 for each As-species and 10 μg L −1 for each Hg-species) were all lower than 3.7%. The proposed method was successfully applied for speciation analyses of arsenic and mercury in five lotus roots, which indicated DMA (3.5–7.9 μg kg −1 ) as the only arsenic species and MeHg (0.6–1.0 μg kg −1 ) as the only mercury species. Analyses of two certified reference materials demonstrated good agreement between determined values and certified values. All results prove its advantages including high sensitivity and high analytical efficiency, which are beneficial for routine speciation analyses of arsenic and mercury in a single run in environmental and food fields.
研究领域:
环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL SCIENCES
·
2023
·
IF 1.6
Zhou Shaomin,Wang Heng,Tang Jun,Wang Heng,Yan Jianbo
A high-performance liquid chromatography-inductively coupled plasma mass spectrometry-based method was developed for the simultaneous determination of four iodine species (i.e. iodate, 3-iodo-tyrosine, 3,5-diiodo-tyrosine, and iodide) and six arsenic species (i.e. arsenobetaine, arsenite, dimethylarsinic acid, arsenocholine, methylarsonic acid, and arsenate) in human urine. The chromatographic separation was performed on a Dionex IonPac As7 anion exchange column. The mobile phase was initiated with 0.5 mmol/L ammonium carbonate solution, followed by 50 mmol/L ammonium carbonate/100 mmol/L ammonium nitrate solution (with 4% methanol). The limits of quantification of the analytes ranged from 0.045 to 2.26 μg/L. At three spiked levels (10.0, 20.0, 50.0 μg/L), the average recoveries (%) ranged from 87.4 to 113.1%, and the relative standard deviations (RSD, %) ranged from 0.4 to 17.2%. The ratio of the sum of six arsenic species to the total arsenic measured by ICPMS ranged from 77.4 to 121.2%, and the ratio of the sum of the four iodine species to the total iodine ranged from 70.7 to 114.7%, indicating a good agreement between these two methods for both arsenic and iodine. Graphical abstract
研究领域:
分析化学
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环境科学
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医学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Pingxiu Zeng,Feng Guo,Yuanchao Wang,Hongmei Hu,Jinhua Liu,Heyong Cheng
Cadmium, tin, mercury, and lead are four widespread metals in our environment from natural sources and human activities, and their toxic, metabolic, and bioavailable properties are chemical form-dependent. Considering large sample capacity in food, environmental and related fields, efficient, sensitive, inexpensive, and green methodologies are preferred for quantifying cadmium, tin, mercury, and lead compounds in an analytical trial. Herein we proposed a tetra-elemental method for simultaneous measurement of Cd, Sn, Hg, and Pb compounds by interfacing high-performance liquid chromatography with inductively coupled plasma mass spectrometry. The tetra-elemental method measured 12 metal compounds within 24 min in satisfactory precisions (<4.3 %) and low detection limits (0.022, 0.011–0.15, 0.016–0.028, and 0.013–0.021 μg L −1 for Cd(II), five tin compounds, three mercury compounds, and three lead compounds, respectively). By applying the proposed tetra-elemental speciation method to shrimp and fish, we found Cd(II) (0.043 mg kg −1 ) presented only in shrimp and methylmercury (0.8–4.6 μg kg −1 ) in both shrimp and fish with the absence of all targeted Sn and Pb compounds, which were far below the maximum limits by China GB 2762-2022. Overall, the proposed method offered significant advantages in analytical, economic and environmental aspects with good applicability to a wide range of food, environmental, and biological samples.
研究领域:
分析化学
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食品科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Ying Yu,Yutao Jia,Zeming Shi,Youliang Chen,Shijun Ni,Ruilin Wang,Yurong Tang,Ying Gao
An enhanced photochemical vapor generation (PVG) sample introduction procedure is developed for the determination of trace Bi with inductively coupled plasma mass spectrometry (ICP MS) by the addition of iron. Gas chromatography mass spectrometry (GC–MS) reveals that (CH3)3Bi is the major component of the volatile Bi species formed in the presence of 20% (v/v) acetic acid, 5% (v/v) formic acid, and 60 μg mL–1 Fe3+ under UV irradiation. The addition of Fe3+ not only largely increases the PVG efficiency of Bi3+ but also accelerates the reaction kinetics of photochemical reduction of Bi3+. The analytical sensitivity was enhanced 30-fold using PVG for sample introduction compared to that for direct solution nebulization detection by ICP MS detection. Furthermore, the proposed method shows much better tolerance of interference from Cu2+ and Ni2+ than that from conventional hydride generation (HG). Under the optimized conditions, a detection limit of 0.3 ng L–1 was obtained for Bi by ICP MS determination. The relative standard deviation (RSD) was 2.5% for seven replicate measurements of 0.5 ng mL–1 Bi3+ standard solution. The proposed method has been successfully applied for the determination of Bi in environmental samples, including water samples, and certified reference material of soil (GSS-1) and sediments (GSD-5a and GSD-10) with satisfying 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
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Qing Yang,Hanjiao Chen,Jing Hu,Ke Huang,Xiandeng Hou
Efficient simultaneous photochemical vapor generation (PVG) of ruthenium (Ru) and osmium (Os) in the medium of formic acid was demonstrated. A flow-through photoreactor hyphenated to an inductively coupled plasma-mass spectrometer (ICP-MS) was used for the PVG and subsequent detection of the two elements. A similar synergistic enhancement from cobalt and cadmium ions on the PVG efficiency of both Ru and Os was discovered. Following the critical evaluation of the impacts of various transition metal ions, the concentrations of formic acid, cobalt, and cadmium ions, the flow rate of carrier gas, and the UV irradiation time, impressive limits of detection (LODs) of 5 and 0.5 ng L–1 were achieved for Ru and Os, respectively. The accuracy of the proposed PVG-ICP-MS method was validated by the analysis of several water samples with desirable spike recoveries obtained. Furthermore, the volatile compounds of Ru were directed and cryogenically trapped in acetonitrile and generation of carbonyls of Ru was verified by high-resolution electrospray ionization-mass spectra (ESI-MS).
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Xiao-Xia Zhou,Quanzhi Xiao,Kena Zhang,Yan Gao,Jie Zhang,Liping Fang,Bing Yan,Fangbai Li
The uptake, translocation, and transformation of engineered nanoparticles (ENPs) in plants present significant challenges due to the lack of effective determination methods. This is especially true for selenium nanoparticles (SeNPs), which hold promise for Se-biofortified agriculture and exhibit dynamic behaviors within plant system. Herein, we proposed a novel approach that incorporates enzymic digestion and membrane filtration to selectively extract SeNPs and dissolved Se from plant tissues, employing rice (Oryza sativa) plant as a model. Subsequently, the SeNPs retained on the membrane were quantified using inductively coupled plasma mass spectrometry (ICPMS), while the dissolved Se in the filtrate, including selenite (Se(IV)), selenate (Se(VI)), and seleno amino acid, were analyzed by liquid chromatography coupled with ICPMS (LC-ICPMS). Recoveries of 83.5–91.4% for SeNPs and 73.6–99.4% for dissolved Se at a spiking level of 8 μg/g in quality control samples were obtained. With the established method, it was discovered that SeNPs taken up by rice leaves can transform into Se (IV) and organic Se, and all the Se species could be translocated downward, but only Se (IV) and SeNPs could be excreted through the roots. These findings provide valuable insights into the fate of SeNPs in plants and their related biological responses.
研究领域:
环境科学
·
植物科学
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分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2022
·
IF 6.556
Wenxin Cui,Zhaoqing Cai,Qing Li,Haiyun Qu,Jiaqian Zheng,Dengguang Yu,Junfeng Chen,Zheng Wang
In this study, a laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) method for in-situ determination of yttrium and trace elements in yttrium-doped barium fluoride (BaF 2 : Y) crystals was proposed. A facile, micro-damage procedure for quantifying the segregation coefficient of doping elements was investigated, and it was found that the actual yttrium doping concentration increases from the seed end to the tail end in BaF 2 : Y crystals. In micro-area analysis, this method has higher mass sensitivity which was applied to quantify the impurity content and distribution during the growth of BaF 2 : Y crystals. Regression coefficient of calibration curve for each element ranged from 0.9918 to 0.9995. Detection limits (DLs) were 0.05, 0.03, 0.01 and 0.01 μg g −1 for Mg, Zn, Sr and Pb, respectively. The accuracy of the proposed method was verified by inductively coupled plasma mass spectrometry/atomic emission spectroscopy (ICP-MS/AES) with wet-chemical pretreatment. The objective of the presented work was to provide a less damaging and more novelty approach for crystal sample analysis.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
·
2014
·
IF 3.15
Xiaolan Liu,Man He,Beibei Chen,Bin Hu
A novel method based on on-line polymer monolithic capillary microextraction (CME)-inductively coupled plasma mass spectrometry (ICP-MS) was developed for the determination of trace Au and Pd in biological samples. For this purpose, poly(glycidyl methacrylate-ethylene dimethacrylate) monolith was prepared and functionalized with mercapto groups. The prepared monolith exhibited good selectivity to Au and Pd, and good resistance to strong acid with a long life span. Factors affecting the extraction efficiency of CME, such as sample acidity, sample flow rate , eluent conditions and coexisting ion interference were investigated in detail. Under the optimal conditions, the limits of detection (LODs, 3σ) were 5.9 ng L − 1 for Au and 8.3 ng L − 1 for Pd, and the relative standard deviations (RSDs, c = 50 ng L −1 , n = 7) were 6.5% for Au and 1.1% for Pd, respectively. The developed method was successfully applied to the determination of Au and Pd in human urine and serum samples with the recovery in the range of 84–118% for spiked samples. The developed on-line polymer monolithic CME-ICP-MS method has the advantages of rapidity, simplicity, low sample/reagent consumption, high sensitivity and is suitable for the determination of trace Au and Pd in biological samples with limited amount available and complex matrix.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2013
·
IF 4.387
Xiaopan Chen,Chao Han,Heyong Cheng,Jinhua Liu,Zigang Xu,Xuefeng Yin
This work demonstrated the feasibility of mercury speciation analysis by anion exchange chromatographic separation with inductively coupled plasma mass spectrometry detection. For the first time, by complexing with the mobile phase containing 3-mercapto-1-propanesulfonate into negatively charged complexes, fast separation of inorganic mercury (Hg 2+ ), monomethylmercury (MeHg), ethylmercury (EtHg) and phenylmercury (PhHg) was achieved within 5 min on a 12.5-mm strong anion exchange column. The detection limits for Hg 2+ , MeHg, EtHg and PhHg were 0.008, 0.024, 0.029 and 0.034 μg L −1 , respectively. The relative standard deviations of peak height and peak area (5.0 μg L −1 for each Hg species) were all below 3%. The determined contents of Hg 2+ , MeHg and total Hg in a certified reference material of fish tissue by the proposed method were in good accordance with the certified values with satisfactory recoveries. The relative errors for determining MeHg and total mercury were −2.4% and −1.2%, respectively, with an acceptable range for spike recoveries of 94–101%. Mercury speciation in 11 fish samples were then analyzed after the pretreated procedure. The mercury contents in all fish samples analyzed were found compliant with the criteria of the National Standards of China.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
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