Abstract We investigated the application of fungus Phallus impudicus loaded γ-Fe2O3 nanoparticles as a biosorbent for magnetic solid phase extractions of trace levels of Zn(II) and Cr(III) ions from natural samples before their measurements by inductively coupled plasma optical emission spectrometry. The characterization of magnetized P. impudicus was performed using the scanning electron microscope, the energy dispersive X-ray and Fourier transform infrared spectroscopy. Important experimental factors were investigated. The experimental results fitted well to the Langmuir adsorption model and pseudo-second order kinetic model. Limit of detections of targeted ions by magnetic solid phase extraction method based on use of P. impudicus were found as 10.5 ngL−1 and 12.6 ngL−1 respectively for Cr(III) and Zn(II). The sorption capacities of the biosorbent were 22.8 mgg−1 for Cr(III) and 25.6 mgg−1 for Zn(II). The preconcentration factors were achieved as 100 for both of ions. RSDs for inter- and intraday precisions were found as lower than 2.0% and 2.1% respectively for both of targeted ions. The accuracy of the recommended process was tested by recovery measurements on the certificated reference materials and successfully applied for quantification recoveries of Cr(III) and Zn(II) ions from water and food samples.

中文翻译：

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载有 γ-Fe2O3 的 Phallus impudicus 作为固相生物萃取剂，用于从水和食品样品中预浓缩 Zn(II) 和 Cr(III)

摘要 我们研究了真菌 Phallus impudicus 负载的 γ-Fe2O3 纳米颗粒作为生物吸附剂的应用，用于磁性固相萃取天然样品中痕量 Zn(II) 和 Cr(III) 离子，然后再通过电感耦合等离子体发射光谱法进行测量。使用扫描电子显微镜、能量色散 X 射线和傅里叶变换红外光谱对磁化的 P. impudicus 进行表征。研究了重要的实验因素。实验结果与朗缪尔吸附模型和准二级动力学模型拟合良好。发现基于使用 P. impudicus 的磁性固相萃取方法对目标离子的检测限分别为 10.5 ngL-1 和 12.6 ngL-1，Cr(III) 和 Zn(II)。生物吸附剂的吸附能力对 Cr(III) 为 22.8 mgg-1，对 Zn(II) 为 25.6 mgg-1。两种离子的预浓缩因子均达到 100。发现两种目标离子的日间和日内精密度的 RSD 分别低于 2.0% 和 2.1%。推荐过程的准确性通过对认证参考材料的回收率测量进行测试，并成功应用于水和食品样品中 Cr(III) 和 Zn(II) 离子的定量回收率。