当前位置: X-MOL 学术Environ. Sci.: Nano › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Coupling single particle ICP-MS with field-flow fractionation for characterizing metal nanoparticles contained in nanoplastic colloids
Environmental Science: Nano ( IF 7.3 ) Pub Date : 2019/12/19 , DOI: 10.1039/c9en00637k
Angela Barber 1, 2, 3, 4, 5 , Sun Kly 1, 6, 7, 8 , Matthew G. Moffitt 1, 6, 7, 8 , Logan Rand 1, 2, 3, 4 , James F. Ranville 1, 2, 3, 4
Affiliation  

Use of nano-enabled products increases the potential for release of engineered nanoparticles (ENP) into the environment. Product weathering and further environmental transformations can create composite particles (CPs) that may contain multiple ENPs, a residual product matrix (e.g. polymer), or transformed/added surface coatings. Methodology that uses transmission electron microscopy (TEM), single particle ICP-MS (spICP-MS) and field-flow fractionation (FFF) was developed to facilitate the investigation of metallic ENPs associated with CPs. In this study, colloidal-sized nanoplastic CPs consisting of a gold–polymer nanocomposite (polystyrene-block-poly(acrylic acid)) were examined to reveal how combining FFF with spICP-MS can be used to characterize CPs. Metal NP size and particle number concentration is obtained by spICP-MS. Asymmetric flow field-flow fractionation (AF4) and centrifugal field-flow fractionation (CFFF) separate and size the CPs based on their hydrodynamic diameter and buoyant mass, respectively. Off-line spICP-MS analysis of fractions obtained by the FFF separations facilitated measurement of the mass and number of Au–PS (gold–polystyrene) ENPs (from 1 to >8) contained in the CPs. In particular, CFFF utilizing a carrier that was density-matched to the polymer proved very successful in measuring multiple gold ENPS in the CPs. The developed methodology can be applied to investigate ENP properties in environmental systems.

中文翻译:

耦合单粒子ICP-MS与场流分馏以表征纳米塑料胶体中包含的金属纳米粒子

纳米产品的使用增加了将工程纳米颗粒(ENP)释放到环境中的潜力。产品风化和进一步的环境转化会产生复合颗粒(CP),其中可能包含多个ENP,残留的产品基质(例如聚合物)或转化/添加的表面涂层。开发了使用透射电子显微镜(TEM),单颗粒ICP-MS(spICP-MS)和场流分级分离(FFF)的方法,以促进与CP相关的金属ENP的研究。在这项研究中,胶体大小的纳米塑料CP由金聚合物纳米复合材料(聚苯乙烯嵌段)组成。-聚(丙烯酸))进行了检查,以揭示如何结合使用FFF和spICP-MS来表征CP。金属NP大小和颗粒数浓度通过spICP-MS获得。非对称流场流分馏(AF4)和离心场流分馏(CFFF)分别根据CP的流体动力学直径和浮力来分离CP和确定CP的大小。通过FFF分离获得的馏分的离线spICP-MS分析有助于测量CP中包含的Au-PS(金-聚苯乙烯)ENP(1至> 8)的质量和数量。特别是,CFFF利用与聚合物密度匹配的载体成功地测量了CP中的多种金ENPS。所开发的方法可用于研究环境系统中的ENP特性。
更新日期:2020-02-20
down
wechat
bug