ANALYTICAL LETTERS
·
2020
·
IF 1.467
Shuangyang Chen,Benard Muinde Kimatu,Donglu Fang,Xin Chen,Guitang Chen,Qiuhui Hu,Liyan Zhao
A study on the transformations of six arsenic species (arsenocholine (AsC), arsenobetaine (AsB), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), arsenite (As(III)), and arsenate (As(V))) was carried out in aqueous solution by ultrasonic treatment. The transformations of arsenic species increased with time. As the ultrasonic power or temperature was increased, transformations of arsenic species were at first enhanced and then decreased. AsC, AsB, As(III) were the most unstable at 600 W and 20 °C. DMA and MMA were stable; AsC was partially transformed to AsB, trimethylarsinic oxide (TMAO), and the more toxic tetramethylarsonium ion (TMA+); AsB was partially transformed to TMAO; and As(III) was easily oxidized to As(V). The reduction of As(V) to As(III) was only observed when the temperature was over 60 °C. The ultrasound treatment conditions with relatively stable arsenic species were 150 to 300 W, 40 to 80 °C, and 0 to 10 min. The relatively stable (150 W, 10 min, 80 °C) and unstable (600 W, 60 min, 20 °C) ultrasonic condition were applied to mushrooms and the transformations of AsC, AsB, and As(III) were observed. Currently, ultrasound-assisted extraction methods have only focused on the extraction efficiency of arsenic species and ignored their transformations. This study may serve as a guide for improving extraction efficiency without minimal transformation of the arsenic forms to reflect the actual contents in edible mushrooms. The study also provides a theoretical basis for making an accurate risk evaluation of human exposure by taking account of possible arsenic transformations during processing prior to consumption.
研究领域:
食品科学
·
环境毒理学
·
分析化学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Fan Du,Peng Liu,Kai Wang,Zhaoguang Yang,Lin Wang
Different ionomic profiles of plants are associated with different external stresses to which they are exposed. Investigation of ionomic variation is necessary for understanding the migration and detoxification of toxic elements in plants. In the current study, rice plants were treated with arsenite , arsenate, monomethylarsonic acid and dimethylarsinic acid in hydroponics. The ionomic responses of the rice plants to different arsenic (As) species stresses were measured and analyzed. The multielement approach is more sensitive at detecting significant variations from external environmental stresses than the consideration of several individual elements. The pairs of significant correlations between elements varied based on the rice tissues and As species used in treatment, resulting in specific correlation networks. However, some pairs of correlations existed regardless of As species treatment used in this study. Positive correlations between P and Fe were observed in rice roots treated with any of the As species, implying that P and Fe share similar biological processes. The heatmap from hierarchical cluster analysis (HCA) agreed with the principal component analysis (PCA) results in ionomic differentiation between roots and shoots. Furthermore, ionomic differences between rice plants treated with different As species were identified through PCA. This study revealed that the ionomic profiles in rice plants are sufficient to detect responses to environmental perturbations. Association studies between ionomics and genomics are necessary to further understand the potential mechanisms that promote uptake or exclusion of elements in plants.
研究领域:
植物学
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环境科学
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 10
·10148-10158
·
IF 2.914
Du Fan,Wang Lin,Yang Zhaoguang,Liu Peng,Li Deliang
Freshwater aquatic environment close to cities and industrial areas is more sensitive than marine environment. The freshwater shellfish Semisulcospira cancellate was introduced as a bioindicator to monitor the heavy metal contamination in the river through ionomic profiles and arsenic speciation. The shellfish samples were collected near four cities along the Xiang River in China. The concentrations of elements including Mg, Al, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, As, Sr, Cd, Sn, Sb, Ba, and Pb were determined using ICP-MS. Multivariate statistical analyses such as Pearson’s correlation analysis and principle component analysis (PCA) were employed to identify the possible sources of the elements in the shellfish samples. Three principle components were extracted from the ionomic matrix and were associated with natural existence, biological pathways, and mining and smelting activities, respectively. The ionomic profiles of the shellfish samples were evaluated through hierarchical cluster analysis (HCA) which was exhibited in the form of heatmap. The shellfish samples were categorized according to the sampling sites with different contamination levels. Six As species including arsenite [As(III)], arsenate [As(V)], monomethylarsonic acid (MMA), dimethylarsinic acid (DMA), arsenobetaine (AsB), and arsenocholine (AsC) were separated and quantified using HPLC-ICP-MS. The concentrations of As(III) and As(V) were linearly increased with total As concentration increasing. However, the proportion of AsB was decreased with total As while the AsB concentration was irrelevant to total As.
研究领域:
环境科学
·
生物学
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产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2019
·
IF 3.579
Jun Chen,Wenqi Cao,Peixiao Wei,Ting Li,Wuyin Weng
Speciation transformation of arsenic in the abalone viscera hydrolysate fraction (AVHF) was evaluated using in vitro and in vivo methods to determine its safety given that AVHF is rich in arsenic. The dimethylarsinic acid (DMA) proportion and some free amino acid contents increased, whereas arsenobetaine (AB) proportion decreased when AVHF was digested by pepsin. However, molecular weight distribution was unchanged, and no obvious changes were found in the intestinal medium. In the single-dose experiment, the AB concentration on the mouse plasma rapidly increased, which reached up to 12.53 ng/mL in 2 h after the administration of AVHF (10 g/kg body weight) and reduced to half of the maximum at 8 h after administration. Furthermore, alanine (Ala) content in the urine of mice increased at 8 h after AVHF administration, suggesting that Ala might be chelated with arsenic and could not be absorbed well. Long-term experiments showed that AB was not accumulated in mice tissue/organ. However, some AB could be converted into DMA, which was mainly accumulated in mice hair. The in vivo experiments also suggested that the AVHF is safe as health food.
研究领域:
营养学
·
毒理学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 29
·期 4
·5043-5051
·
IF 4.223
Xu
Jing,Wu Yi,Ma Mengling,Luo Tao,Xia Jun,Zhang Xiang
Iron species that occur in natural surface water could affect the photochemical behavior of pollutants. Complexation between iron species and polycarboxylate or heavy metals has been widely reported, where the ligands could be oxidized via ligand-to-metal charge transfer (LMCT) by light inducement. Such complexation and photochemical reactions might also occur for low valance metal-containing organic compounds, which is worthy of investigation. This work studied the phototransformation of p -arsanilic acid (ASA), an organic arsenic compound that is widely used as a feed additive in the poultry industry, by colloidal ferric hydroxide (CFH) using black light lamps ( λ = 365 nm) as the light source. The results revealed the contribution to ASA transformation at circumneutral conditions by CFH through an LMCT process, which is the same as that for As(III). The complexation between ASA and CFH was investigated using UV–vis spectroscopy. The estimated equilibrium constant for the CFH–ASA complex was log K f271 = 4.22. The analysis of the photoproducts found the generation of both inorganic and organic arsenic. Our findings confirmed the similarities in the photochemical mechanisms of ASA and As(III) in the presence of CFH. The results help in further understanding the fate of organoarsenicals in the surface water environment.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2019
·
IF 1.248
Zhipeng Wang,Jie Xu,Yanjun Liu,Zhaojie Li,Yong Xue,Yuming Wang,Changhu Xue
This study aimed at developing an accurate method for determining the levels of total arsenic (As) and arsenic species in edible shrimp with the collision/reaction cell (CRC) in the O2 mass-shift mode to remove interferences. The microwave-assisted extraction method demonstrated satisfactory efficiency (86.9%), and As species were separated rapidly within 11 min when the optimized chromatographic conditions were adopted. During the study, the limits of detection, precision, and spike recovery for six arsenic species were in the ranges from 0.010 to 0.028 μg/L, 1.89 to 3.14%, and 96.9 to 103.2%, respectively. The analytical methods were successfully applied to determine the concentrations of total arsenic and As species in eight shrimp samples. The results showed that arsenobetaine was the predominant As species, and inorganic arsenic contents were below 0.5 mg/kg in the shrimp samples analyzed. The health risk assessment indicated that the shrimp samples detected posed no particular risk of As to local consumers.
研究领域:
分析化学
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食品安全
·
环境科学
✓ 已验证
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Kai Nan,Man He,Beibei Chen,Yujie Chen,Bin Hu
A method based on ion-pair reversed phase high performance liquid chromatography (HPLC) hyphenated with inductively coupled plasma mass spectrometry (ICP-MS) was developed for arsenic speciation in extract of tree moss. Under the optimal conditions, the limit of detection of eight arsenic species including arsenite (As III ), arsenate (As V ), monomethylarsonic acid (MMA), dimethylarsonic acid (DMA), trimethylarsinoxide (TMAO), tetramethylarsonium (Tetra), arsenocholine (AsC) and arsenobetaine (AsB) is between 0.04 and 0.07 ng/mL, with a linear range of 0.2 − 500 ng/mL. Three unknown arsenic species (Unk1, Unk2 and Unk3) and six specific arsenic species (As III , As V , DMA, TMAO, Tetra and AsB) were detected in the extract of tree moss. Unk3 was identified as a kind of arsenosugars (2,3-dihydroxypropyl-5-deoxy-5(dimethylarsenoso)furanoside, arsenosugar X) by electrospray ionization quadrupole time-of-flight mass spectrometry (ESI-qTOF-MS).
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 111
·110247-110254
·
IF 3.289
Xiaojun Wang,Guoliang Xu,Peng Chen,Xueying Liu,Ye Fang,Siyu Yang,Guozhen Wang
A novel magnetic ionic liquid-based air-assisted liquid–liquid microextraction (MIL–AALLME) technique was developed for highly selective separation of trace amounts of arsenite and arsenate species in various environmental water, sediment and soil samples prior to its determination by graphite furnace atomic absorption spectrometry (GFAAS). This highly efficient separation method combines the advantages of magnetic ionic liquid (MIL) and air-assisted liquid–liquid microextraction (AALLME) for the first time. The MIL, 1-butyl-3-methylimidazolium tetrachloroferrate ([C4mim][FeCl4]), was used as the extractant to simplify the microextraction procedure by magnetic separation. The variables of interest in the MIL–AALLME method, such as pH values, amounts of chelating agent, types and amounts of MIL, salt effect and number of extraction cycles were assessed and optimized systematically. Under optimal extraction conditions, the MIL–AALLME method provided a good linear dynamic range (LDR) in the range of 0.04–10.0 μg L−1 and the determination coefficient was 0.9991. Using the present method, the limit of detection (LOD) and the relative standard deviation (RSD) for seven replicate measurements of 2.0 μg L−1 of As(III) was 0.029 μg L−1 and 2.5%, respectively. The developed methodology was successfully used for inorganic arsenic speciation studies in different environmental water, sediment and soil samples with satisfactory results ranging from 93.0 to 108.5% for the spiked samples. In order to confirm the accuracy of MIL–AALLME, five standard reference materials such as GBW08605 simulated natural water and GBW07309 sediment were analyzed, and the analyzed values found by using the present methodology were in statistic agreement with the certified values.
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 Aquatic Food Product Technology
·
2019
·
IF 0.707
Wuyin Weng,Jieyu Li,Ting Li,Yanjun Ye
A fraction with molecular weight of 0.2–1.0 kDa was prepared from abalone viscera hydrolysate by ultrafiltration and nanofiltration. The contents of protein, carbohydrate, and fat in abalone viscera were 45.75%, 18.19%, and 13.60%, respectively. The protein in abalone viscera hydrolysate faction (AVHF) reached up to 75.73%, while carbohydrate and fat fell to 1.80% and 0.20%, respectively. The leucine (Leu) content was the highest in the AVHF. On the other hand, the hydroxyl and 2,2-diphenyl-1-picrylhydrazyl radical scavenging activities and reducing power increased with increased concentration of AVHF. The inhibiting ability of AVHF on lipid peroxidation was higher than that of ascorbic acid. The total content of K, Na, and P in AVHF was 9.78 g/100 g, and total arsenic content reached 16.23 mg/kg. The proportion of arsenobetaine and arsenocholine accounted for more than 96%, while the proportion of arsenate was 0.47%, and arsenite was not detectable. It is concluded that the AVHF from abalone viscera is a safe natural antioxidant.
研究领域:
食品科学
·
营养学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Jingjing Wang,Wenhui Zhang,Yuxia Zheng,Nan Zhang,Changsen Zhang
Multi-functionalized magnetic graphene was prepared by surface-initiated initiators for continuous activator regeneration atom transfer radical polymerization (ICAR ATRP) mediated by polydopamine chemistry . The obtained multi-functionalized magnetic graphene was used as an adsorbent for application in adsorption and speciation of arsenic. Adsorption kinetics and isotherms of arsenic were investigated by batch adsorption experiments. The adsorbent displayed simultaneous or selective removal ability for As(III) and As(V) within different pH ranges. The adsorption of both As(III) and As(V) agreed well with the Freundlich isotherm model, and they were effectively adsorbed through chelation and electrostatic interaction, respectively. Moreover, the functionalized magnetic graphene was examined as a column packing material for speciation analysis of arsenic using solid phase extraction technique. As(III) and As(V) could be effectively separated through a sequential elution strategy. An alkaline solution was firstly employed to selectively elute As(V), and then an acidic solution was utilized to elute As(III). The developed adsorbent in the present study was successfully applied to the determination of As(III) and As(V) in natural and environmental water samples with satisfactory results.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2019
·
IF 3.481
Gengxin Hao,Wenqi Cao,Ting Li,Jun Chen,Jinli Zhang,Wuyin Weng,Kazufumi Osako,Huifeng Ren
The effect of temperature on the main components and antioxidant activities of abalone viscera subcritical water extract (AVSWE) was investigated. With the increase in temperature from 110 °C to 230 °C, the protein content in AVSWE increased from 57.4% to 68.5%, while the carbohydrate content decreased from 17.9% to 0.8%. The highest percentage of 1000–5000 Da peptide fraction and total essential amino acid content was found in the AVSWE extracted at 170 °C. The transformation rate of arsenobetaine into dimethylarsinic acid in AVSWE increased dramatically with the increase subcritical water temperature from 170 °C to 200 °C. The results of DPPH and hydroxyl radical scavenging activity, reducing power and lipid peroxidation inhibition effect showed that AVSWE with the highest antioxidant activities was extracted at 170 °C. However, the subcritical water temperature for AVSWE extraction should not exceed 140 °C according to arsenic speciation.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Haimin Zou,Chen Zhou,Yongxin Li,Xiaosong Yang,Jun Wen,Shaojie Song,Changxiong Li,Chengjun Sun
Some varieties of edible mushrooms can accumulate high contents of arsenic, which is a public health concern. In this study, we developed a high-performance liquid chromatography method linked to inductively coupled plasma triple quadrupole mass spectrometry (HPLC-ICP-MS/MS) for sensitive and accurate determination of arsenite, arsenate, monomethylarsonic acid, dimethylarsinic acid, arsenocholine and arsenobetaine in edible mushrooms. The six arsenic species were extracted ultrasonically from mushrooms using ultrapure water at 60 °C as the solvent, separated on a PRP-X100 anion exchange column (4.1 × 250 mm, 10 µm), with 20 mmol/L NH 4 HCO 3 and 50 mmol/L (NH 4 ) 2 CO 3 as the mobile phase, and quantified using ICP-MS/MS in the oxygen reaction mode. The linear range of the method was 0.5 µg/L–100 µg/L with detection and quantification limits of 2.5 µg/kg–10 µg/kg (S/N = 3), and 8 µg/kg–33 µg/kg (S/N = 10), respectively. This method was applied successfully to the detection and speciation of arsenic in eight varieties (266 samples) of mushrooms. Our results indicated that most wild edible mushrooms contained organic arsenic, mainly arsenobetaine and arsenocholine. However, the inorganic arsenic content of Armillariella tabescens (3.63 mg/kg) and parts of the cultivated Agaricus blazei murrill (up to 4.50 mg/kg) were relatively high, which is potential risk to the health of consumers.
研究领域:
食品科学
·
分析化学
·
环境毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）