Development of reusable magnetic chitosan microspheres adsorbent for selective extraction of trace level silver nanoparticles in environmental waters prior to ICP-MS analysis
文献类型：期刊论文
| 作者 | Amde, Meseret; Tolessa, Tesfaye; Zhou, Xiao-Xia; Liu, Jing-Fu |
| 刊名 | TALANTA
 |
| 出版日期 | 2017-06-20 |
| 卷号 | 169期号:0页码:91-97 |
| 关键词 | Chitosan Microspheres Cross-linking Technique Selectivity Reusability |
| 英文摘要 | Solid-phase extraction (SPE) based on reusable magnetic chitosan microspheres was coupled with ICP-MS for separation and quantification of silver nanoparticles (AgNPs) in the presence of silver ions in environmental water samples. The monodisperse magnetic chitosan microspheres with an average size of 2 mu m were engineered using suspension cross-linking technique, and characterized and investigated for its application as SPE adsorbent. Parameters affecting the SPE were optimized, and the best performance was achieved by extracting a 20 mL sample (pH 4.5) with 10 mg adsorbent for 90 min, followed by elution with 1 mL 1% (w/v) thiourea in 10% (v/v) nitric acid for 10 min. The detection limit, calculated as 3 s (s, standard deviation for 11 blank readings), for three AgNPs coated with polyvinyl pyrrolidone (PVP), citrate and polyvinyl alcohol (PVA) and sizes of 31, 40, 46 nm, respectively, were in the range of 0.016-0.023 mu g/L. The repeatability and reproducibility (RSD, n=7) at a spiking level of 0.1 mu g/L AgNPs were 4.2% and 8.1%, respectively. The developed method has been applied in the analysis of AgNPs in river, lake and wastewater samples, with excellent extraction efficiencies (84.9-98.8%) for AgNPs at spiking levels of 0.86 and 8.70 mu g/L. The cationic chitosan microspheres showed good species selectivity and reusability for extraction of AgNPs in the presence of Ag+, and hence the proposed method is simple, cost effective and environmentally friendly. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39293]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Amde, Meseret,Tolessa, Tesfaye,Zhou, Xiao-Xia,et al. Development of reusable magnetic chitosan microspheres adsorbent for selective extraction of trace level silver nanoparticles in environmental waters prior to ICP-MS analysis[J]. TALANTA,2017,169(0):91-97. |
| APA | Amde, Meseret,Tolessa, Tesfaye,Zhou, Xiao-Xia,&Liu, Jing-Fu.(2017).Development of reusable magnetic chitosan microspheres adsorbent for selective extraction of trace level silver nanoparticles in environmental waters prior to ICP-MS analysis.TALANTA,169(0),91-97. |
| MLA | Amde, Meseret,et al."Development of reusable magnetic chitosan microspheres adsorbent for selective extraction of trace level silver nanoparticles in environmental waters prior to ICP-MS analysis".TALANTA 169.0(2017):91-97. |
入库方式： OAI收割
来源：生态环境研究中心
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