Zhong Junlei, Wang Zhikun, Chen Yujie, Huan Weiwei, Shi Man, Lei Lixin, Yu Xuejun, Chen Liang
Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University Hangzhou Zhejiang 311300 P.R. China
State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University Lin'an 311300 Zhejiang Province China
RSC Adv. 2024 Jul 16;14(31):22497-22503. doi: 10.1039/d4ra02573c. eCollection 2024 Jul 12.
The development of a green, safe, and accurate sample preparation method for the determination of trace metal elements in environmental samples is of great importance. Choline chloride-based deep eutectic solvents (DESs) were used to extract heavy metal elements from litterfall and the target analytes were measured using inductively coupled plasma optical emission spectrometry. Factors such as the type, ratio, dosage, and extraction time and temperature of the DESs were studied. A DES system based on choline chloride and maleic acid had the highest extraction efficiency of 98.5%, 88.4%, 90.2%, and 93.7% for Cd, Cu, Zn, and Fe. Under the optimized conditions, the limits of detection and limits of quantification were in the range of 0.04-0.70 and 0.13-2.30 mg kg. The repeatability ( = 3), estimated in terms of the relative standard deviation, ranged from 1.14% to 3.40%. The proposed method was validated for accuracy using GBW10087. Notably, the energy consumption of the newly developed method was only one-fifth that of a traditional acid digestion method. This work not only presents an environmentally friendly method for the determination of trace element concentrations in environmental samples but also deepens our understanding of DES systems.
开发一种绿色、安全且准确的用于测定环境样品中痕量金属元素的样品前处理方法具有重要意义。基于氯化胆碱的低共熔溶剂（DESs）被用于从凋落物中萃取重金属元素，并使用电感耦合等离子体发射光谱法测定目标分析物。研究了DESs的类型、比例、用量、萃取时间和温度等因素。基于氯化胆碱和马来酸的DES体系对Cd、Cu、Zn和Fe的萃取效率最高，分别为98.5%、88.4%、90.2%和93.7%。在优化条件下，检测限和定量限分别在0.04 - 0.70和0.13 - 2.30 mg/kg范围内。以相对标准偏差衡量的重复性（n = 3）在1.14%至3.40%之间。使用GBW10087对所提出方法的准确性进行了验证。值得注意的是，新开发方法的能耗仅为传统酸消解方法的五分之一。这项工作不仅提出了一种测定环境样品中微量元素浓度的环保方法，还加深了我们对DES体系的理解。
