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Fast and Eco-Friendly Determination of Nitrite in Water Using Deep Eutectic Solvent-Based Magnetic Bucky Gels
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2022-03-19 , DOI: 10.1002/clen.202200076 Marzieh Abdolhosseini 1 , Farzaneh Shemirani 1 , Seyedeh Mahboobeh Yousefi 1
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2022-03-19 , DOI: 10.1002/clen.202200076 Marzieh Abdolhosseini 1 , Farzaneh Shemirani 1 , Seyedeh Mahboobeh Yousefi 1
Affiliation
In this study, a novel magnetic bucky gel (MBG) is synthesized and coupled with dispersive magnetic solid-phase extraction for preconcentration and determination of trace levels of nitrite in various water samples. The MBG is prepared by dispersing magnetic graphitic carbon nitride nanocomposite (g-C3N4@Fe3O4) in a choline chloride-urea deep eutectic solvent (DES) (1:2, molar ratio). The DES acts as a disperser and surface modifier for g-C3N4/Fe3O4 nanocomposites simultaneously and leads to superior uptake of the analyte in a shorter time. The sorbent is characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and field emission scanning electron microscopy. The NO2− determination is carried out by UV–vis spectrophotometry. Variable factors on preconcentration of NO2− including pH, composition of MBG, contact time, sample volume, eluent type, eluent volume, and elution time are optimized. Under optimum condition, the limit of detection is 1.56 µg L−1, the linear dynamic range extends from 5.14 to 900.00 µg L−1, the relative standard deviation (n = 5) and the preconcentration factor are 2.7% and 100, respectively. The method is successfully used for the preconcentration of NO2− ions in different water samples and gave recoveries between 89% and 103%.
中文翻译:
使用深共晶溶剂基磁性巴基凝胶快速、环保地测定水中的亚硝酸盐
在这项研究中,合成了一种新型磁性巴基凝胶 (MBG),并与分散磁性固相萃取相结合,用于预浓缩和测定各种水样中的痕量亚硝酸盐。MBG是通过将磁性石墨氮化碳纳米复合材料(gC 3 N 4 @Fe 3 O 4)分散在氯化胆碱-尿素低共熔溶剂(DES)(1:2,摩尔比)中制备的。DES 用作 gC 3 N 4 /Fe 3 O 4的分散剂和表面改性剂纳米复合材料同时进行,并在更短的时间内导致分析物的出色吸收。吸附剂通过傅里叶变换红外光谱、X射线衍射和场发射扫描电子显微镜进行表征。NO 2 -测定通过紫外-可见分光光度法进行。对 NO 2 -预浓缩的可变因素进行了优化,包括 pH、MBG 的组成、接触时间、样品体积、洗脱液类型、洗脱液体积和洗脱时间。最佳条件下,检测限为1.56 µg L -1,线性动态范围从5.14扩展到900.00 µg L -1,相对标准偏差(n= 5) 和预浓缩因子分别为 2.7% 和 100。该方法成功地用于不同水样中 NO 2 -离子的预浓缩,回收率在 89% 和 103% 之间。
更新日期:2022-03-19
中文翻译:
使用深共晶溶剂基磁性巴基凝胶快速、环保地测定水中的亚硝酸盐
在这项研究中,合成了一种新型磁性巴基凝胶 (MBG),并与分散磁性固相萃取相结合,用于预浓缩和测定各种水样中的痕量亚硝酸盐。MBG是通过将磁性石墨氮化碳纳米复合材料(gC 3 N 4 @Fe 3 O 4)分散在氯化胆碱-尿素低共熔溶剂(DES)(1:2,摩尔比)中制备的。DES 用作 gC 3 N 4 /Fe 3 O 4的分散剂和表面改性剂纳米复合材料同时进行,并在更短的时间内导致分析物的出色吸收。吸附剂通过傅里叶变换红外光谱、X射线衍射和场发射扫描电子显微镜进行表征。NO 2 -测定通过紫外-可见分光光度法进行。对 NO 2 -预浓缩的可变因素进行了优化,包括 pH、MBG 的组成、接触时间、样品体积、洗脱液类型、洗脱液体积和洗脱时间。最佳条件下,检测限为1.56 µg L -1,线性动态范围从5.14扩展到900.00 µg L -1,相对标准偏差(n= 5) 和预浓缩因子分别为 2.7% 和 100。该方法成功地用于不同水样中 NO 2 -离子的预浓缩,回收率在 89% 和 103% 之间。