Minganti Vincenzo, Drava Giuliana, De Pellegrini Rodolfo, Anselmo Marco, Modenesi Paolo, Malaspina Paola, Giordani Paolo
Dipartimento di Farmacia (DIFAR), Università degli Studi di Genova, Viale Cembrano 4, 16148 Genova, Italy.
Dipartimento di Farmacia (DIFAR), Università degli Studi di Genova, Viale Cembrano 4, 16148 Genova, Italy.
Chemosphere. 2015 Jan;119:1361-1364. doi: 10.1016/j.chemosphere.2014.02.026. Epub 2014 Mar 12.
In this work, the bark of holm oak was used as a bioindicator to study the atmospheric distribution of Cr(VI). The chosen method (alkaline extraction and atomic absorption determination) was found in the literature, adapted for use with the matrix involved, and validated. The method had some limits, but provided an excellent estimation of Cr(VI) concentrations with good sensitivity and a reasonable time of analysis and cost. Thirty-four samples of holm oak collected in three areas characterised by different possible sources of pollution (the area near a former chromate production plant, an urban area, and a rural "reference" area) were analysed, obtaining concentrations ranging from 1.54 to 502 μg g(-1) near the industrial plant, ranging from 0.22 to 1.35 μg g(-1) in the urban area, and mostly below the detection limit (0.04 μg g(-1)) in the rural area. The bark of holm oak proved to be a good bioindicator to detect Cr(VI) in the environment. The extraction procedure followed by atomic absorption analysis is simple, provides good sensitivity, and it is suitable for environmental studies.
在这项工作中，圣栎树皮被用作生物指示剂来研究六价铬的大气分布。所选用的方法（碱性萃取和原子吸收测定）是在文献中找到的，针对所涉及的基质进行了调整并经过验证。该方法有一些局限性，但能以良好的灵敏度、合理的分析时间和成本对六价铬浓度进行出色的估算。对在三个具有不同潜在污染源特征的区域（一个 former chromate production plant 附近的区域、一个市区和一个农村“参照”区域）采集的34个圣栎样本进行了分析，在工业厂房附近获得的浓度范围为1.54至502微克/克，在市区为0.22至1.35微克/克，而在农村地区大多低于检测限（0.04微克/克）。圣栎树皮被证明是检测环境中六价铬的良好生物指示剂。随后进行原子吸收分析的萃取程序简单，灵敏度高，适用于环境研究。
