TALANTA
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2018
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IF 4.244
Chao Wang,Man He,Beibei Chen,Bin Hu
In this work, ethylenediamine modified poly(glycidyl methacrylate-ethylene dimethacrylate)(poly(GMA-EDMA-NH 2 )) was prepared for highly selective extraction of Se(VI) with high adsorption capacity of 0.825 mg m −1 (530 µm i.d.). Based on it, a novel method of polymer monolithic capillary microextraction (CME) on-line coupling with inductively coupled plasma-mass spectrometry (ICP-MS) was developed for the determination of inorganic selenium species (Se(IV)/Se(VI)) in natural waters. Under the optimized conditions, the analytical performance of the proposed on-line CME-ICP-MS method was evaluated for Se(VI). The limit of detection for Se(VI) was 14.2 ng L −1 , and the enrichment factor was 50-fold with the sample throughput of 5 h −1 . For Se(IV), the concentration was obtained by subtracting Se(VI) from the total Se(VI) obtained by the proposed method after oxidation of Se(IV) to Se(VI). The accuracy of the method was validated by the analysis of a Certified Reference Materials of GBW(E)080395. The proposed method was applied for the analysis of inorganic selenium species in natural waters with good recoveries. The developed method of monolithic CME-ICP-MS is sensitive, simple and rapid for the analysis of inorganic selenium species in natural waters.
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
PubMed
高影响因子
Food Analytical Methods
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2021
·Vol. 14
·期 11
·2420-2429
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IF 3.366
Cao Jinping,Cheng Yuanzhi,Xu Bocheng,Wang Yizhen,Wang Fengqin
To ensure reasonable intake of selenium for humans and provide insights on the development and nutritional analysis of high-quality selenium-enriched food, we established a reliable and highly sensitive method for the determination of selenium species in Z0206 selenium-enriched polysaccharide (Se-EPS). By optimizing the pre-treatment conditions (different enzymes, enzyme combinations, enzymatic time, concentration of enzymes, and centrifugation time), we found that Se-EPS can be effectively hydrolyzed by proteinase K for 18 h, followed by HPLC-ICP-MS determination. The developed method presented high sensitivity with the limit of detection and quantitation in the range of 0.44–2.35 μg L −1 and 1.54–7.21 μg L −1 . The relative standard deviation (RSD) was all less than 10% and recovery was greater than 80% except for SeCys2, which further validated the repeatability and accuracy of the proposed method. Under the optimized conditions, we could determine 4 selenium species: elemental selenium (78.37%), seleno-methionine (14.27%), selenocystine (0.03%), and Se-methylselenocysteine (5.22%) in Se-EPS. This work provides new insights into the determination of different selenium species in selenium-enriched food.
研究领域:
分析化学
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营养科学
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食品科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2020
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IF 3.594
Xiaofang Jiang,Jing Hu,Yajun Zhang,Xiaoliang Zeng,Zhou Long
Dielectric barrier discharge (DBD) has recently been validated by us as a fast, facile and green strategy for the preparation of metal-organic frameworks (MOFs), while the so-prepared MOFs still await further application as functional materials. Moreover, bimetallic MOFs have been reported to be advantageous over their single-metal counterparts for diverse applications, which were for the first time synthesized based on DBD in this work, with UiO-66(Zr/Ce) and Tb 1.7 Eu 0.3 (BDC) 3 (H 2 O) 4 obtained within 20 min, much shorter than that for the conventional methods. The UiO-66(Zr/Ce) showed highly selective absorption of Se(IV), and the determination and speciation analysis of Se by atomic spectrometry were accomplished with improved sensitivity and good selectivity if using UiO-66(Zr/Ce) as the absorbent for Se(IV) preconcentration prior to the measurement. The Tb 1.7 Eu 0.3 (BDC) 3 (H 2 O) 4 acted as the probe for ratiometric fluorescent sensing of dipicolinic acid (DPA), with the performance similar to other Tb-Eu MOFs synthesized by the conventional methods. This work demonstrated that bimetallic MOFs could be efficiently synthesized by the DBD-based strategy and further applied to spectrometric analysis, with similar performance to or even expanded application scope of the previously reported.
研究领域:
材料科学
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分析化学
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环境科学
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DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2025
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IF 6.6
Lingyang Yao,Huan Tian,Zhengyu Bao,Shuyun Xie,Tao Feng,Min Sun,Hui Ma,Lingyun Yao,Qiangjun Lang
In this study, four Se species including selenite [Se (VI)], selenate [Se (VI)], potassium,2-selenocyanatoacetate (PSeCA), and selenium ore powder (SeOP) were used for biofortification of Pleurotus geesteranus to obtain Se-enriched mushroom. Based on their effects on mycelium growth of P. geesteranus Jinxiu, [Se (VI)] in the concentration range of 100–1000 μg/kg and other three Se species in the range of 100–2000 μg/kg were adopted in spawn running and fruiting body growth stage, with their effects on production yield and elements accumulation evaluated. The results revealed that PSeCA treatment (200 μg/kg) had the highest fruiting body production (290.61 g/bag), followed by 2000 μg/kg of SeOP treatment (286.24 g/bag). SeMet revealed to be dominant species detected in mushroom, with [Se (VI)] exhibited the highest biological efficiency among the four Se species, and 2000 μg/kg of PSeCA treatment exhibited the highest Se content (10.25 mg/kg) in terminal phase of fruiting body. The results suggested that high concentration of PSeCA would be more favored for the Se biofortification. Moreover, Se treatment could greatly alter the mineral elements content of fruiting bodies, both synergistic and antagonistic relationships on accumulation of mineral elements were observed for each tested Se species.
研究领域:
真菌学
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农业生物技术
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环境科学
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营养科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）