采用 ICP-MS 法测定 PM2.5 中可溶和不可溶元素。
Determination of water-soluble and insoluble elements in PM2.5 by ICP-MS.
机构信息
Department of Chemistry, University of Patras, 265 00 Rio-Patras, Greece.
Department of Chemistry, University of Patras, 265 00 Rio-Patras, Greece.
出版信息
Sci Total Environ. 2014 Sep 15;493:694-700. doi: 10.1016/j.scitotenv.2014.06.043. Epub 2014 Jul 1.
The elemental composition of water-soluble and acid-soluble fractions of PM2.5 samples from two different Greek cities (Patras and Megalopolis) was investigated. Patras and Megalopolis represent different environments. Specifically, Patras is an urban environment with proximity to a large port, while Megalopolis is a small city located close to lignite power plants. Both cities can serve as a representative example of European cities with similar characteristics. The concentration of 14 elements (As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Fe, Sr, Ti, V and Zn) was determined in each fraction by ICP-MS. Microwave assisted digestion was used to digest the samples using a mixture of HNO3 and HF. For the determination of the water soluble fraction, water was chosen as the simplest and most universal extraction solvent. For the validation of the extraction procedure, the recoveries were tested on two certified reference materials (NIST SRM 1648 Urban Particulate Matter and NIST 1649a Urban Dust). Results showed that Zn has the highest total concentration (273 and 186 ng/m(3)) and Co the lowest (0.48 and 0.23 ng/m(3)) for Patras and Megalopolis samples, respectively. Nickel with 65% for Patras and As with 49% for Megalopolis displayed the highest solubility, whereas Fe (10%) and Ti (2%) the lowest ones, respectively.
研究了来自两个不同希腊城市（帕特雷和迈加拉）的 PM2.5 样品中水溶性和酸溶性部分的元素组成。帕特雷和迈加拉代表不同的环境。具体来说，帕特雷是一个靠近大型港口的城市环境，而迈加拉是一个靠近褐煤发电厂的小城市。这两个城市都可以作为具有类似特征的欧洲城市的代表。通过 ICP-MS 测定了每个部分中 14 种元素（As、Cd、Co、Cr、Cu、Fe、Mn、Ni、Pb、Sr、Ti、V 和 Zn）的浓度。采用 HNO3 和 HF 的混合物，使用微波辅助消化对样品进行消解。对于水溶性部分的测定，选择水作为最简单和最通用的提取溶剂。为了验证提取程序，在两种认证参考物质（NIST SRM 1648 城市颗粒物和 NIST 1649a 城市粉尘）上测试了回收率。结果表明，对于帕特雷和迈加拉样品，Zn 的总浓度最高（分别为 273 和 186 ng/m(3))，Co 的总浓度最低（分别为 0.48 和 0.23 ng/m(3))。镍在帕特雷的溶解率为 65%，砷在迈加拉的溶解率为 49%，而铁的溶解率最低（10%），钛的溶解率最低（2%）。
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