Article
Chemistry, Analytical
I. Morales-Benitez, P. Montoro-Leal, J. C. Garcia-Mesa, M. M. Lopez Guerrerp, E. Vereda Alonso
Summary: A novel method for Cr(III) and Cr(VI) speciation in environmental samples was developed using magnetic nanoparticles coupled to graphene oxide. The method combined inductively coupled plasma optical emission spectrometry with on-line magnetic solid phase extraction. The synthesized sorbent material showed good performance with low detection limits and high enrichment factors. The developed method was successfully applied to analyze chromium speciation in environmental water samples, showing good agreement with certified values and high recoveries for spiked samples.
Article
Chemistry, Analytical
Ghazale Daneshvar Tarigh, Masoumeh Bakhtiari, Farzaneh Shemirani
Summary: In this research, a hydrophobic task-specific room temperature ionic liquid was synthesized and immobilized on magnetic multi-wall carbon nanotubes to create a reusable nano sorbent for the extraction and speciation of chromium species. The methodology involved adsorption of the target ion on the surface of the extractant, separation using an external magnet, and measurement by UV-Vis spectrophotometer. The developed procedure showed good linearity, low detection limits, and high precision.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Kamal K. Jinadasa, Paloma Herbello-Hermelo, Elena Pena-Vazquez, Pilar Bermejo-Barrera, Antonio Moreda-Pineiro
Summary: A pre-concentration method for low mercury levels in seaweed was developed, utilizing an imprinted polymer for selective extraction and determination of mercury species. The method showed low detection limits, good repeatability, and was successfully applied to certified reference materials and edible seaweeds for analysis of methylmercury and Hg(II).
Review
Chemistry, Analytical
Rui Chen, Xiaoqiang Qiao, Fengmao Liu
Summary: This review comprehensively summarizes the application of ionic liquid-based magnetic nanoparticles (IL-MNPs) in magnetic dispersive solid-phase extraction (MDSPE). The preparation methods of IL-MNPs and the characteristics of different modified materials are introduced. Furthermore, the research prospects and development directions of IL-MNPs in the context of MDSPE are identified.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Jinling Pang, Hexun Chen, Xiaojia Huang
Summary: A new method for chromium speciation was proposed by combining magnetism-assisted in-tube solid phase microextraction with high-performance liquid chromatography. The method showed high extraction efficiency for Cr(III) and Cr(VI) complexes, with detection limits of 0.0059 ?g/L and 0.0020 ?g/L in water samples, and 0.47 ?g/kg and 0.057 ?g/kg in soil samples. The successful quantification of trace levels of Cr(III) and Cr(VI) in environmental samples demonstrated the reliability and practicality of the approach.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Applied
Tiantian Tang, Shurui Cao, Cunxian Xi, Zhiqiong Chen
Summary: A magnetically and recyclable multifunctional nanohybrid adsorbent was prepared by incorporating chitosan, graphene oxide, and ionic liquid, which showed enhanced adsorption capacity for alkaloids. The adsorbent could be potentially used for extracting illicit additives in food samples.
CARBOHYDRATE POLYMERS
(2021)
Review
Chemistry, Analytical
Houmei Liu, Pian Jin, Fucheng Zhu, Lei Nie, Hongdeng Qiu
Summary: This review comprehensively summarizes the works on molecularly imprinted polymers incorporating with ionic liquids (IL-MIPs) and their application in solid-phase extraction (SPE), discussing the roles of ILs in the preparation of IL-MIPs and the application of IL-MIPs as SPE adsorbents in different forms.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Chemical
Rui Chen, Xianzhao Zhang, Fengmao Liu, Chengcheng Liu, Qingrong Peng, Xiaoqiang Qiao
Summary: Conductor-like screening model for realistic solvents (COSMO-RS) is a useful tool for predicting the properties of solvents. This study used COSMO-RS to design and screen 144 ionic liquids (ILs) with affinity for benzimidazoles (BZDs). Ionic liquid-based magnetic nanoparticles (IL-MNPs) were prepared and showed excellent adsorption ability for BZDs. The magnetic dispersive solid-phase extraction (MDSPE) method for BZDs was established and successfully applied to detect trace BZDs in human plasma. The results demonstrated the feasibility of theoretically screening ILs and designing IL-MNPs as specific adsorption materials.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Kaisheng Hong, Youfang Huang, Lingxin Zheng, Xinyi Zheng, Xiaojia Huang
Summary: This article introduces the convenient preparation of a functionalized magnetic adsorbent PFMA, which is used in combination with magnetic solid-phase extraction to efficiently capture phenylurea herbicides. Results show that PFMA has abundant functional groups and excellent magnetic properties, achieving trace level determination of PUHs in HPLC analysis.
ANALYTICA CHIMICA ACTA
(2022)
Article
Spectroscopy
Maria N. Oviedo, Maria B. Botella, Emiliano F. Fiorentini, Pablo Pacheco, Rodolfo G. Wuilloud
Summary: A highly selective and efficient method using graphene oxide (GO) and a magnetic ionic liquid (MIL) for dispersive micro-solid phase extraction (D-mu-SPE) of inorganic Sb speciation analysis was developed. Sb(III) was complexed with sodium diethyldithiocarbamate (DDTC) and retained on GO, followed by magnetization of the sorbent surface with MIL and separation using a magnetic rod. The aqueous phase containing only Sb(V) was directly analyzed by ICP-MS. The method showed high extraction efficiency, low limits of detection, and good precision for Sb(III) and Sb(V) determination. It was successfully applied in the analysis of inorganic Sb species in tap water, tea infusions, and honey samples. The method also demonstrated good environmental performance according to the Analytical GREEnness calculator (AGREE) with a value of 0.61.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Maryam Farahmandi, Yadollah Yamini, Mahroo Baharfar, Monireh Karami
Summary: A customized microfluidic system was utilized for magnetic solid phase extraction of parabens, achieving efficient extraction and magnetic separation. Magnetite nanoparticles were synthesized and various chemical and instrumental parameters were optimized for characterization and stability of the particles. The method was successfully applied for the extraction of parabens from fruit juice, sunscreen, and urine samples with favorable accuracy and precision.
ANALYTICA CHIMICA ACTA
(2021)
Article
Biochemical Research Methods
Lizhen Qiao, Yuan Tao, Honglin Qin, Ruiting Niu
Summary: Several new multi-magnetic center magnetic ionic liquids (MMILs) were prepared and used as extractants for the enrichment and determination of four parabens in beverages. The dispersive liquid-liquid microextraction (DLLME) approach combined with in-situ MMIL de-composition based back-extraction was established. The developed method showed good extraction performance and high precision.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Chemistry, Physical
The Thai Nguyen, Tam Thanh Thi Huynh, Nhi Hoang Nguyen, Trinh Hao Nguyen, Phuong Hoang Tran
Summary: Functional material ionic liquids have unique physical and chemical properties, and recent developments in silica-supported ionic liquids for solid-phase extraction have combined the advantages of the two materials. This review explores the synthetic methods for preparing silica-supported ionic liquids and discusses their application in solid-phase extraction, as well as future prospects for development.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Analytical
Conny P. Mokgohloa, Mary S. Thomas, Ntebogeng S. Mokgalaka, Abayneh A. Ambushe
Summary: This study analyzed the speciation of chromium in water samples from Blood and Mokolo Rivers in Limpopo Province using graphite furnace-atomic absorption spectrometry and solid phase extraction. The results indicated low concentrations of chromium in both rivers, but suggested a link with industrial and agricultural activities in the area.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Maria Jose Lo Faro, Antonio Alessio Leonardi, Dario Morganti, Sabrina Conoci, Barbara Fazio, Alessia Irrera
Summary: In this research, a hybrid platform combining vertically oriented silicon nanowires and different types of carbon nanotube bucky gels in an ionic liquid matrix was realized. The structural and optical responses of three types of CNT bucky gels to the hybrid platforms were analyzed and compared. The electrical response of the IL-CNT/NW hybrid junctions in dark and under illumination was investigated, and its correlation to the ionic liquid characteristics and charge mobility was studied. The results confirm the attractiveness of IL-CNT/NW hybrid platforms as novel light-responsive materials for photovoltaic applications, with the best performing cell showing a short-circuit current density of 5.6 mA/cm(2) and an open-circuit voltage of 0.53 V.