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Yang X, Wang J, Chang G, Sun C, Wu Q, Wang Z. Post-synthetic modification of covalent organic framework for efficient adsorption of organochlorine pesticides from cattle's milk. Food Chem 2024; 439:138182. [PMID: 38100880 DOI: 10.1016/j.foodchem.2023.138182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/24/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
Analysis of organochlorine pesticides (OCPs) residues in milk faces a significant challenge. Herein, a sea urchin structured covalent organic framework bearing boric acid groups named COF-B(OH)2 was synthesized and applied as a coating material for solid-phase microextraction (SPME) of the OCPs in cattle's milk. Its performance was superior to that of three commonly used commercial SPME fibers, which could be due to the coexistence of hydrogen bonding, halogen bonding, π-stacking and electrostatic interactions. Besides, the fiber coating displayed good stability and reusability. After optimization, a COF-B(OH)2 based SPME coupled with gas chromatography-electron capture detection was established for the sensitive detection of the OCPs from milk samples. The limits of detection (S/N = 3) were between 0.04 and 1.00 μg kg-1. Satisfactory accuracy was achieved with the method recoveries in the range of 87.5 % to 112.5 %. These results manifest the feasibility of the COF-B(OH)2 coated fiber for the enrichment of the trace OCPs from milk samples.
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Affiliation(s)
- Xiumin Yang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China.
| | - Junmin Wang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Guifen Chang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Cuihong Sun
- College of Chemical Engineering, Shijiazhuang University, Shijiazhuang 050035, China
| | - Qiuhua Wu
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhi Wang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China.
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2
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Zang X, Chang Q, Li H, Zhao X, Zhang S, Wang C, Wang Z. Construction of a ringent multi-shelled hollow MIL-88B as the solid-phase microextraction fiber coating for the extraction of organochlorine pesticides. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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3
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Wang C, An Y, Li Z, Wang Q, Liu W, Hao L, Wang Z, Wu Q. Facile fabrication of hydroxyl-functionalized hypercrosslinked polymer for sensitive determination of chlorophenols. Food Chem 2022; 396:133694. [PMID: 35849985 DOI: 10.1016/j.foodchem.2022.133694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 07/08/2022] [Accepted: 07/11/2022] [Indexed: 11/25/2022]
Abstract
Three hydroxyl-functionalized hypercrosslinked polymers (HCP-POL, HCP-HQ and HCP-PG) were synthesized by Friedel-Crafts reaction. The HCP-HQ displayed the largest surface area and highest adsorption capacity for chlorophenols (CPs). Thus, the HCP-HQ was further modified with magnetism to obtain M-HCP-HQ. An efficient magnetic solid-phase extraction method with M-HCP-HQ as adsorbent was developed for the first time to simultaneously extract four CPs from water and honey samples before analysis by high performance liquid chromatography-diode array detection. Under optimized conditions, the low detection limits (S/N = 3) were obtained to be 0.06-0.10 ng mL-1 for water and 0.80-1.75 ng g-1 for honey. The method recovery was 80.7%-119%, with relative standard deviations below 9.5%. The enrichment factors of the CPs were in the range of 57-220. The extraction mechanism could be attributed to the strong polar interaction, hydrogen bonding and π-π interactions between the M-HCP-HQ and CPs. The M-HCP-HQ based method can be served as a reliable and sensitive tool for detection CPs in water and honey samples.
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Affiliation(s)
- Chun Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Yangjuan An
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhi Li
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Qianqian Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Weihua Liu
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Lin Hao
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhi Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Qiuhua Wu
- College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China.
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4
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Huang G, Su M, Liu Y, Zhang W, Yang J, Xu Z, Li S. Comparative Study of Hyper-crosslinked Polymer-Solid Phase Microextraction and Stir Bar Fabric Phase Sorptive Extraction for Simultaneous Determination of Fluoroquinolones in Water. Chromatographia 2022. [DOI: 10.1007/s10337-022-04165-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Wang Y, Lian L, Wang X, Yue B, Ding L, Lou D. Velvet-like carbon nitride as a solid-phase microextraction fiber coating for determination of polycyclic aromatic hydrocarbons by gas chromatography. J Chromatogr A 2022; 1671:462993. [DOI: 10.1016/j.chroma.2022.462993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/08/2022] [Accepted: 03/23/2022] [Indexed: 11/24/2022]
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6
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Shao L, Liu N, Wang L, Sang Y, Wan H, Zhan P, Zhang L, Huang J, Chen J. Facile preparation of oxygen-rich porous polymer microspheres from lignin-derived phenols for selective CO 2 adsorption and iodine vapor capture. CHEMOSPHERE 2022; 288:132499. [PMID: 34626649 DOI: 10.1016/j.chemosphere.2021.132499] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 09/29/2021] [Accepted: 10/05/2021] [Indexed: 05/27/2023]
Abstract
Lignin is a natural O-containing aromatic amorphous polymers from the residues of biorefinery and industrial papermaking, it can derive lots of aromatic phenol chemicals used as industrial raw materials by an efficient depolymerization, and then produce synthetic polymers. Here, we selected six aromatic units from the liquid products of lignin depolymerization, and tried to prepare diversified O-rich hyper-cross-linked polymers (HCPs) by one-pot Friedel-Crafts alkylation reaction for CO2 and iodine vapor capture. HCP1, HCP2, and HCP3 microspheres possessed similar porous structure with Brunauer-Emmett-Teller (BET) surface areas (SBET) of 14.1-20.6 m2/g and high O content (26.34-30.68 wt%), while HCP4, HCP5, and HCP6 were composed of many bulks with 3D networks structure, and showed larger SBET of 15.4-246.9 m2/g and relatively low O content (18.48-26.38 wt%). The results indicated that the chemical position and quantities of substituent groups (methoxy and alkyl) into lignin-derived units had evident impact on their morphology and textural parameters. These HCPs exhibited considerable CO2 uptake (64.1 mg/g) and selectivity (35.2) at 273 K, and high iodine vapor uptake (192.3 wt%). Moreover, the performance analysis implied that the SBET and pore volume of these HCPs had not played the dominated roles in the CO2 and I2 adsorption, while their pore size distribution, O-functional groups, and electron density will be more important for the capture of the both. This study will offer a facile synthesis of O-rich polymer microsphere adsorbents based on the green and sustainable lignin.
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Affiliation(s)
- Lishu Shao
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Na Liu
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Lizhi Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
| | - Yafei Sang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
| | - Huan'ai Wan
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Peng Zhan
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Lin Zhang
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha, 410004, China
| | - Jianhan Huang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
| | - Jienan Chen
- Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha, 410004, China.
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7
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Application of β-Cyclodextrin metal-organic framework/titanium dioxide hybrid nanocomposite as dispersive solid-phase extraction adsorbent to organochlorine pesticide residues in honey samples. J Chromatogr A 2021; 1663:462750. [PMID: 34942488 DOI: 10.1016/j.chroma.2021.462750] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 11/29/2021] [Accepted: 12/13/2021] [Indexed: 11/21/2022]
Abstract
A simple and efficient dispersive solid-phase extraction (D-SPE) method combined with gas chromatography tandem mass spectrometry (GC-MS/MS) was developed to determine organochlorine pesticides (OCP) in honey. Firstly, a type of hybrid nanocomposite (CD-MOF/TiO2) was prepared by grafting a metal-organic framework material synthesized with cyclodextrin as an organic ligand onto titanium dioxide. Then, the CD-MOF/TiO2 was used as a D-SPE adsorbent to extract the OCP, and the effects of the amount of adsorbent, ultrasonic time, vortex time, pH, and salinity on the extraction were investigated using Plackett-Burman design and Box-Behnken Design. Under the optimized adsorption and desorption conditions, an analysis method that combined D-SPE with GC-MS/MS was established. The linear ranges of 14 OCP are 1-500 μg kg-1 and the correlation coefficients are between 0.9991 and 1.000. The limits of detection and quantification vary from 0.01 to 0.04 μg kg-1 and 0.04 to 0.12 μg kg-1, respectively. The intra-day and inter-day precision of this method are suitable (RSDs% less than 11.3%). The established CD-MOF/TiO2 / D-SPE method was used for the extraction of OCP in honey samples with recovery in the range of 76.4 to 114.3%. The results demonstrate that the CD-MOF/TiO2 has a good selective enrichment ability for OCP and is suitable for the D-SPE pretreat of honey sample analysis.
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8
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Lin S, Zhao Z, Lv YK, Shen S, Liang SX. Recent advances in porous organic frameworks for sample pretreatment of pesticide and veterinary drug residues: a review. Analyst 2021; 146:7394-7417. [PMID: 34783327 DOI: 10.1039/d1an00988e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Rapid and accurate detection of pesticide and veterinary drug residues is a continuing challenge because of the complex matrix effects. Thus, appropriate sample pretreatment is a crucial step for the effective extraction of the analytes and removal of the interferences. Recently, the development of nanomaterial adsorbents has greatly promoted the innovation of food sample pretreatment approaches. Porous organic frameworks (POFs), including polymers of intrinsic microporosity, covalent organic frameworks, hyper crosslinked polymers, conjugated microporous polymers, and porous aromatic frameworks, have been widely utilized due to their tailorable skeletons and pores as well as fascinating features. This review summarizes the recent advances for POFs to be utilized in adsorption and sample preparation of pesticide and veterinary drug residues. In addition, future prospects and challenges are discussed, hoping to offer a reference for further study on POFs in sample pretreatment.
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Affiliation(s)
- Shumin Lin
- College of Chemistry and Environmental Science, Institute of Life Science and Green Development, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, 071002, PR China. .,Analysis and Testing Center, Inner Mongolia University of Science and Technology, Baotou, 014010, PR China
| | - Zhe Zhao
- College of Chemistry and Environmental Science, Institute of Life Science and Green Development, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, 071002, PR China.
| | - Yun-Kai Lv
- College of Chemistry and Environmental Science, Institute of Life Science and Green Development, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, 071002, PR China.
| | - Shigang Shen
- College of Chemistry and Environmental Science, Institute of Life Science and Green Development, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, 071002, PR China.
| | - Shu-Xuan Liang
- College of Chemistry and Environmental Science, Institute of Life Science and Green Development, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding, 071002, PR China.
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9
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Huang G, Su M, Zhang W, Liu Y, Chen C, Li S. Evaluation of three sorbent-phase extraction techniques based on hyper-crosslinked polymer for the extraction of five endocrine disrupters in water. J Sep Sci 2021; 45:760-770. [PMID: 34856057 DOI: 10.1002/jssc.202100654] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 01/01/2023]
Abstract
A series of low-cost hyper-crosslinked polymers were prepared by an easy one-step Friedel-Crafts reaction. The synthesized hyper-crosslinked polymers exhibited remarkably porous structure, large surface area, and hydroxyl groups, which can be employed as an ideal adsorbent material for novel sorbent-phase extraction techniques. Based on this, using hyper-crosslinked polymers as sorbent and coating, three novel extraction methods, including micro-solid-phase extraction, dispersive solid-phase extraction, and solid-phase microextraction, were explored and evaluated for simultaneous measurement of five endocrine-disrupting compounds (triclosan and bisphenol A, tetrabromobisphenol A, tetrabromobisphenol A bisallylether, and tetrabromobisphenol A bis(2,3-dibromopropyl ether)) in environment water prior to high-performance liquid chromatography-ultraviolet. The influence of experimental parameters on three extraction techniques such as extraction time, the amount of hyper-crosslinked polymers, extraction temperature, ionic strength, and desorption conditions were optimized. Three previously mentioned methods provided limits of detection ranging from 0.01 to 0.05 μg/L, and high recoveries (85-99%) with relative standard deviations of 1.7-5.6%. This study presented the merits and disadvantages of three proposed extraction methods and their potential for effective monitoring of hazardous pollutants in real water samples.
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Affiliation(s)
- Guiqi Huang
- School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, P. R. China
| | - Meiling Su
- School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, P. R. China
| | - Wei Zhang
- School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, P. R. China
| | - Yamin Liu
- School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, P. R. China
| | - Chunyan Chen
- School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, P. R. China
| | - Simin Li
- School of Energy and Environmental Engineering, Hebei University of Engineering, Handan, P. R. China
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10
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Altınışık Tağaç A, Erdem P, Seyhan Bozkurt S, Merdivan M. Utilization of montmorillonite nanocomposite incorporated with natural biopolymers and benzyl functionalized dicationic imidazolium based ionic liquid coated fiber for solid-phase microextraction of organochlorine pesticides prior to GC/MS and GC/ECD. Anal Chim Acta 2021; 1185:339075. [PMID: 34711316 DOI: 10.1016/j.aca.2021.339075] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/10/2021] [Accepted: 09/15/2021] [Indexed: 11/30/2022]
Abstract
A novel montmorillonite clay (MMT) bionanocomposite modified with chitosan (CH), carboxymethyl cellulose (CMC), and benzylimidazolium based dicationic ionic liquid with tetraethylene glycol linker (DIL) was fabricated on stainless steel wire by in situ process. The MMT-CH-CMC-DIL coated solid-phase microextraction (SPME) fiber was examined for the determination of organochlorine pesticides (OCPs) in real samples by HS-SPME-GC method using mass spectrometry (MS) and electron capture detector (ECD). Under optimized conditions, the proposed method exhibited low limits of detection (0.5 ng L-1 with MS and 0.1 ng L-1 with ECD detection), good linearities (R2 = 0.9972-0.9993 with MS and 0.9987-0.9998 with ECD detection), favorable single-fiber repeatability, and fiber-to-fiber reproducibility (less than 8.2% and 9.9% for both types of detection) and high reusability around 125 cycles. Recovery studies were carried out for OCPs in tap water, green tea, and milk samples to verify the applicability of the developed SPME-GC method.
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Affiliation(s)
- Aylin Altınışık Tağaç
- Chemistry Department, Dokuz Eylul University, Tınaztepe Campus, 35390, Izmir, Turkey
| | - Pelin Erdem
- Chemistry Department, Dokuz Eylul University, Tınaztepe Campus, 35390, Izmir, Turkey
| | - Serap Seyhan Bozkurt
- Chemistry Department, Dokuz Eylul University, Tınaztepe Campus, 35390, Izmir, Turkey
| | - Melek Merdivan
- Chemistry Department, Dokuz Eylul University, Tınaztepe Campus, 35390, Izmir, Turkey.
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11
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Chen T, Yu X, Tian X, Hu J, Chen Y, Long G, Xu H, Yang GF. Study on the environmental fate of three insecticides in garlic by in vivo sampling rate calibrated-solid phase microextraction-gas chromatography-mass spectrometry. Food Chem 2021; 367:130740. [PMID: 34375891 DOI: 10.1016/j.foodchem.2021.130740] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/29/2021] [Accepted: 07/29/2021] [Indexed: 11/19/2022]
Abstract
Traditional sample preparation methods for insecticide analysis are laborious and fatal to living organisms. In the work, an in vivo sampling rate calibrated-solid phase microextraction-gas chromatography-mass spectrometry method was established and successfully used for in vivo sampling and quantitative determination of three insecticides (hexachlorobenzene, fipronil and chlorfenapyr) by direct exposing micron-sized fiber in living garlic. Absorption, enrichment, migration and elimination behavior of insecticides in garlic were investigated. Bioaccumulative effects with obvious tissue differences were observed to all three insecticides, especially for chlorfenapyr. Bioconcentration factors (BCFs) ranging from 0.0342 to 1.0887 were obtained, and the closer to roots, the higher BCFs. The half-life of insecticides in garlic ranged from 0.43 to 0.96 d. In the first 24 h, 55.0% - 80.3% insecticides residues in garlic were eliminated with first-order elimination kinetics. The research provides in vivo insights into the environmental fates of insecticides in complex living system with minimized organism damage.
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Affiliation(s)
- Tiantian Chen
- Key Laboratory of Insecticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Xinhe Yu
- Key Laboratory of Insecticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Xinmeng Tian
- Key Laboratory of Insecticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Jiajia Hu
- Key Laboratory of Insecticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Yanyan Chen
- Key Laboratory of Insecticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Guangdou Long
- Key Laboratory of Insecticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
| | - Hui Xu
- Key Laboratory of Insecticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China.
| | - Guang-Fu Yang
- Key Laboratory of Insecticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China.
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12
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Li J, Zhao B, Guo L, Wang Z, Wang C, Wang Z, Zhang S, Wu Q. Synthesis of hypercrosslinked polymers for efficient solid-phase microextraction of polycyclic aromatic hydrocarbons and their derivatives followed by gas chromatography-mass spectrometry determination. J Chromatogr A 2021; 1653:462428. [PMID: 34329956 DOI: 10.1016/j.chroma.2021.462428] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 07/13/2021] [Accepted: 07/15/2021] [Indexed: 12/24/2022]
Abstract
Three novel hypercrosslinked polymers (HCPs) were synthesized via Friedel-Crafts reaction employing 1,3,5-tris(bromomethyl)-2,4,6-trimethylbenzene as alkylating agent, and triphenylbenzene, tetraphenylethylene and p-quaterphenyl as the aromatic units, respectively. The prepared HCPs were applied as solid-phase microextraction coatings for direct immersion extraction of polycyclic aromatic hydrocarbons (PAHs) and their oxygenated and nitrated derivatives in environmental water samples. The key factors affecting the extraction efficiency including extraction time, extraction temperature, stirring rate, ionic strength and desorption conditions, were carefully studied. Coupled with gas chromatography mass spectrometry analysis, a new method for determining PAHs and their derivatives was developed. Under the optimized conditions, the limits of detection (S/N=3) and limits of quantitation (the lowest concentration for quantification) of the method were in the range of 2.5-25.0 and 7.5-75.0 ng L-1, respectively. The recoveries of spiked samples were in the range of 73.1-118.3% with relative standard deviations less than 13.0%. The developed method was applied for the simultaneous determination of nine PAHs and their derivatives in environmental water samples, showing good accuracy and reliability.
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Affiliation(s)
- Jinqiu Li
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Bin Zhao
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Liying Guo
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhuo Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Chun Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhi Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Shuaihua Zhang
- College of Science, Hebei Agricultural University, Baoding 071001, China.
| | - Qiuhua Wu
- College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China.
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13
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Zang X, Chang Q, Pang Y, Wang L, Zhang S, Wang C, Wang Z. Solid-phase microextraction of eleven organochlorine pesticides from fruit and vegetable samples by a coated fiber with boron nitride modified multiwalled carbon nanotubes. Food Chem 2021; 359:129984. [PMID: 33964660 DOI: 10.1016/j.foodchem.2021.129984] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 04/07/2021] [Accepted: 04/26/2021] [Indexed: 11/30/2022]
Abstract
A boron nitride modified multiwalled carbon nanotube material (BN@MWCNTs) was synthesized, and the synthesis conditions were optimized. The BN@MWCNTs was then used as the SPME fiber coating adsorbent for the extraction of eleven organochlorine pesticides (OCPs) from fruit and vegetable samples. Under the optimal conditions, the SPME coupled with the detection by GC-ECD had a linear response for the determination of the target analytes in the range of 0.03 to 200 ng g-1 with the coefficients of determination (r2) ≥ 0.9977. Based on the signal-to-noise ratios of 3 and 10, the limits of detection and the limits of quantification were measured to be 0.01-0.20 ng g-1 and 0.03-0.67 ng g-1, respectively. The relative recoveries of the analytes for spiked samples under three concentration levels (1.0, 10.0 and 100 ng g-1) were between 83.7% and 124% with the relative standard deviations ≤ 10.9%. The established method was successfully applied to the determination of OCPs in real fruit and vegetable samples.
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Affiliation(s)
- Xiaohuan Zang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Qingyun Chang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China.
| | - Yachao Pang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Ling Wang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Shuaihua Zhang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Chun Wang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhi Wang
- Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China; College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China.
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14
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Chi H, Qi X, Wang X, Wang Y, Han X, Wang J, Wang H. Preparative separation and purification of loliolide and epiloliolide from Ascophyllum nodosum using amine-based microporous organic polymer for solid phase extraction coupled with macroporous resin and prep-HPLC. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:1939-1944. [PMID: 33913944 DOI: 10.1039/d1ay00186h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Herein, we reported a novel approach for the preparative separation and purification of loliolide and epiloliolide from Ascophyllum nodosum. An amine-based microporous organic polymer (MOP) was used for the pretreatment of the nodosum extract via solid-phase extraction (SPE). The obtained extract was further purified using macroporous resin chromatography and preparative high-performance liquid chromatography (prep-HPLC). The loading and elution parameters of the MOP were evaluated using standard loliolide, and the optimized conditions were used during the SPE of the nodosum extract (37.5 g). After the pretreatment with MOP, the extract (2.79 g) was obtained and further purified using a D101 resin column followed by prep-HPLC. A pair of epimers were isolated and identified as loliolide (5.83 mg) and epiloliolide (2.50 mg) using high-resolution electrospray ionization tandem mass spectrometry (HRESI-MS), 1D- and 2D-nuclear magnetic resonance (NMR) spectroscopy. This study demonstrates the potential of MOPs in the separation and purification of monoterpenoids from complex plant samples.
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Affiliation(s)
- Hao Chi
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University, Shandong Academy of Medical Sciences, Qingdao 266071, China.
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15
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Li J, Wang Z, Wang Q, Guo L, Wang C, Wang Z, Zhang S, Wu Q. Construction of hypercrosslinked polymers for high-performance solid phase microextraction of phthalate esters from water samples. J Chromatogr A 2021; 1641:461972. [PMID: 33611110 DOI: 10.1016/j.chroma.2021.461972] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 01/30/2021] [Accepted: 02/02/2021] [Indexed: 11/24/2022]
Abstract
Design and synthesis of novel coatings for solid phase microextraction (SPME) is urgently needed for sample pretreatment. In this study, three hypercrosslinked polymers (HCPs) were constructed by the facile Friedel-Crafts alkylation reactions between tetraphenylethylene (TPE) and 1,4-bis(chloromethyl)benzene (BCMB), 4,4'-bis(chloromethyl)-1,1'-biphenyl (BCMBP), and cyanuric chloride (CC), respectively. The newly-synthesized HCPs were employed as SPME coatings for the extraction of phthalate esters (PAEs). Various parameters influencing the SPME efficiencies, including extraction time and temperature, ionic strength, stirring rate, desorption temperature and time were optimized. Under the optimal conditions, low limits of detection (0.003-0.033 μg L - 1), wide linearity (0.01-10 μg L - 1) and good repeatability (4.1-9.3%) were achieved. The HCPs-based SPME method was successfully applied for the determination of eight PAEs in environmental water and bottled water samples with recoveries from 75.3% to 116%. This method provides a good alternative for monitoring trace level of PAEs in water samples.
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Affiliation(s)
- Jinqiu Li
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhuo Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Qianqian Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Liying Guo
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Chun Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Zhi Wang
- College of Science, Hebei Agricultural University, Baoding 071001, China
| | - Shuaihua Zhang
- College of Science, Hebei Agricultural University, Baoding 071001, China.
| | - Qiuhua Wu
- College of Science, Hebei Agricultural University, Baoding 071001, China.
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16
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Jagirani MS, Ozalp O, Soylak M. New Trend in the Extraction of Pesticides from the Environmental and Food Samples Applying Microextraction Based Green Chemistry Scenario: A Review. Crit Rev Anal Chem 2021; 52:1343-1369. [PMID: 33560139 DOI: 10.1080/10408347.2021.1874867] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review focused on the green microextraction methods used for the extraction of pesticides from the environmental and food samples. Microextraction techniques have been explored and applied in various fields of analytical chemistry since its beginning, as evinced by the numerous reviews published. The success of any technique in science and technology is measured by the simplicity, environmentally friendly, and its applications; and the microextraction technique is highly successive. Deliberations were attentive to studies where efforts have been made to validate the methods through the inter-laboratory comparison study to assess the analytical performance of microextraction techniques against conventional methods. Succinctly, developed microextraction methods are shown to impart significant benefits over conventional techniques. Provided that the analytical community continues to put forward attention and resources into the growth and validation of the microextraction technique, a promising future for microextraction is forecasted.
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Affiliation(s)
- Muhammad Saqaf Jagirani
- Faculty of Sciences, Department of Chemistry, Erciyes University, Kayseri, Turkey.,National Center of Excellence in Analytical Chemistry, University of Sindh, Sindh, Pakistan
| | - Ozgur Ozalp
- Faculty of Sciences, Department of Chemistry, Erciyes University, Kayseri, Turkey.,Technology Research and Application Center (TAUM), Erciyes University, Kayseri, Turkey
| | - Mustafa Soylak
- Faculty of Sciences, Department of Chemistry, Erciyes University, Kayseri, Turkey.,Technology Research and Application Center (TAUM), Erciyes University, Kayseri, Turkey
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17
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Jagirani MS, Soylak M. A review: Recent advances in solid phase microextraction of toxic pollutants using nanotechnology scenario. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105436] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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18
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Jagirani MS, Soylak M. Review: Microextraction Technique Based New Trends in Food Analysis. Crit Rev Anal Chem 2020; 52:968-999. [PMID: 33253048 DOI: 10.1080/10408347.2020.1846491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Food chemistry is the study and classification of the quality and origin of foods. The identification of definite biomarkers and the determination of residue contaminants such as toxins, pesticides, metals, human and veterinary drugs, which are a very common source of food-borne diseases. The food analysis is continuously demanding the improvement of more robust, sensitive, highly efficient, and economically beneficial analytical approaches to promise the traceability, safety, and quality of foods in the acquiescence with the consumers and legislation demands. The traditional methods have been used at the starting of the 20th century based on wet chemical methods. Now it existing the powerful analytical techniques used in food analysis and safety. This development has led to substantial enhancements in the analytical accuracy, precision, sensitivity, selectivity, thereby mounting the applied range of food applications. In the present decade, microextraction (micro-scale extraction) pays more attention due to its futures such as low consumption of solvent and sample, throughput analysis easy to operate, greener, robotics, and miniaturization, different adsorbents have been used in the microextraction process with unique nature recognized with wide range applications.
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Affiliation(s)
- Muhammed Saqaf Jagirani
- Faculty of Sciences, Department of Chemistry, Erciyes University, Kayseri, Turkey.,National Center of Excellence in Analytical Chemistry, University of Sindh, Sindh, Pakistan
| | - Mustafa Soylak
- Faculty of Sciences, Department of Chemistry, Erciyes University, Kayseri, Turkey.,Technology Research and Application Center (TAUM), Erciyes University, Kayseri, Turkey
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Wang R, Sun X, Wang X, Chen J, Wang B, Ji W. Spherical conjugated microporous polymers for solid phase microextraction of carbamate pesticides from water samples. J Chromatogr A 2020; 1626:461360. [DOI: 10.1016/j.chroma.2020.461360] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 01/13/2023]
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20
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Büyüktiryaki S, Keçili R, Hussain CM. Functionalized nanomaterials in dispersive solid phase extraction: Advances & prospects. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115893] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Li J, Xiao Z, Wang W, Zhang S, Wu Q, Wang C, Wang Z. Rational integration of porous organic polymer and multiwall carbon nanotube for the microextraction of polycyclic aromatic hydrocarbons. Mikrochim Acta 2020; 187:284. [PMID: 32323029 DOI: 10.1007/s00604-020-04261-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 04/03/2020] [Indexed: 10/24/2022]
Abstract
By integration of benzene-constructed porous organic polymer (KBF) and multiwalled carbon nanotube (MWCNT), a MWCNT-KBF hybrid material was constructed through in situ knitting benzene with formaldehyde dimethyl acetal in the presence of MWCNTs to form a network. MWCNT-KBF was then adopted as a novel solid-phase microextraction (SPME) fiber coating. Coupled to gas chromatography-flame ionization detection, the MWCNT-KBF-assisted SPME method showed large enhancement factors (483-2066), low limits of detection (0.04-0.12 μg L-1), good linearity (0.13-50 μg L-1), and acceptable reproducibility (4.2-10.2%) for the determination of polycyclic aromatic hydrocarbons (PAHs). The method recoveries of seven PAHs were in the range 80.1-116.3%, with relative standard deviations (RSDs) ranging from 3.5 to 11.9%. The SPME method was successfully applied to the determination of PAHs in river, pond, rain, and waste water, providing a good alternative for monitoring trace level of PAHs in environmental water. Graphical abstract Schematic representation of the rational integration of porous organic polymer (KBF) and multiwalled carbon nanotube (MWCNT) to form a MWCNT-KBF hybrid material through in situ knitting benzene with formaldehyde dimethyl acetal at the presence of MWCNT.
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Affiliation(s)
- Jinqiu Li
- College of Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Zhichang Xiao
- College of Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Wenjin Wang
- College of Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Shuaihua Zhang
- College of Science, Hebei Agricultural University, Baoding, 071001, Hebei, China.
| | - Qiuhua Wu
- College of Science, Hebei Agricultural University, Baoding, 071001, Hebei, China.
| | - Chun Wang
- College of Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Zhi Wang
- College of Science, Hebei Agricultural University, Baoding, 071001, Hebei, China
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Guo Y, He X, Huang C, Chen H, Lu Q, Zhang L. Metal–organic framework-derived nitrogen-doped carbon nanotube cages as efficient adsorbents for solid-phase microextraction of polychlorinated biphenyls. Anal Chim Acta 2020; 1095:99-108. [DOI: 10.1016/j.aca.2019.10.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 10/12/2019] [Accepted: 10/14/2019] [Indexed: 02/06/2023]
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23
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Recent advances in emerging nanomaterials based food sample pretreatment methods for food safety screening. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.115669] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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24
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Triazine-based porous organic framework as adsorbent for solid-phase microextraction of some organochlorine pesticides. J Chromatogr A 2019; 1602:83-90. [DOI: 10.1016/j.chroma.2019.06.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/28/2019] [Accepted: 06/01/2019] [Indexed: 02/05/2023]
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25
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Wang D, Li X, Jin X, Jia Q. Design of cucurbit[6]uril-based hypercrosslinked polymers for efficient capture of albendazole. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.01.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Archer WR, Hall BA, Thompson TN, Wadsworth OJ, Schulz MD. Polymer sequestrants for biological and environmental applications. POLYM INT 2019. [DOI: 10.1002/pi.5774] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- William R Archer
- Department of Chemistry and Macromolecules Innovation InstituteVirginia Tech Blacksburg VA USA
| | - Brady A Hall
- Department of Chemistry and Macromolecules Innovation InstituteVirginia Tech Blacksburg VA USA
| | - Tiffany N Thompson
- Department of Chemistry and Macromolecules Innovation InstituteVirginia Tech Blacksburg VA USA
| | - Ophelia J Wadsworth
- Department of Chemistry and Macromolecules Innovation InstituteVirginia Tech Blacksburg VA USA
| | - Michael D Schulz
- Department of Chemistry and Macromolecules Innovation InstituteVirginia Tech Blacksburg VA USA
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Yang X, Wang J, Wang W, Zhang S, Wang C, Zhou J, Wang Z. Solid phase microextraction of polycyclic aromatic hydrocarbons by using an etched stainless-steel fiber coated with a covalent organic framework. Mikrochim Acta 2019; 186:145. [PMID: 30707320 DOI: 10.1007/s00604-019-3258-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/16/2019] [Indexed: 11/29/2022]
Abstract
A new covalent organic framework (COF) was synthesized by the amide coupling between 1,3,5-tris(4-aminophenyl)benzene and trimesoyl chloride at room temperature. The COF was applied as a steel fiber coating for the solid phase microextraction of polycyclic aromatic hydrocarbons (PAHs) from water samples. The effect of extraction time, salt concentration, and extraction temperature on the efficiency of SPME was optimized by a Box-Behnken design. The PAHs were quantified by gas chromatography with mass spectrometric detection. Figures of merit include (a) a wide linear range (typically from 0.2 ng L-1 to 2 μg L-1), (b) low limits of detection (0.29 to 0.94 ng L-1 at S/N = 3), and (c) high enrichment factors (EFs; 819-2420). Density functional theory was employed to study the interaction between the COF cluster and the PAHs. The results demonstrated that the EFs increase with the enhancement of π stacking interaction. The repeatability (one fiber; n = 5) and reproducibility (fiber to fiber; n = 5), expressed as the relative standard deviations were in the range of 4.3%-8.4% and 8.5-11.0%, respectively. The recoveries of the PAHs from water samples spiked at levels of 20.0 and 100 ng L-1 ranged from 79.0% to 105.0%. Graphical abstract A covalent organic framework prepared from 1,3,5-tris(4-aminophenyl)benzene and trimesoyl chloride (TAPB-TMC-COF) was synthesized and employed as solid phase microextraction (SPME) fiber coating for the extraction of polycyclic aromatic hydrocarbons from water samples prior to gas chromatography (GC) - mass spectrometric (MS) detection.
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Affiliation(s)
- Xiumin Yang
- College of Science, Hebei Agricultural University, Baoding, 071001, China
| | - Junmin Wang
- College of Science, Hebei Agricultural University, Baoding, 071001, China
| | - Wenjin Wang
- College of Science, Hebei Agricultural University, Baoding, 071001, China
| | - Shuaihua Zhang
- College of Science, Hebei Agricultural University, Baoding, 071001, China
| | - Chun Wang
- College of Science, Hebei Agricultural University, Baoding, 071001, China
| | - Junhong Zhou
- Shanghai Institute of Organic Chemistry, Chinese Academy of Science, Shanghai, 200032, China
| | - Zhi Wang
- College of Science, Hebei Agricultural University, Baoding, 071001, China.
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A spherical metal-organic coordination polymer for the microextraction of neonicotinoid insecticides prior to their determination by HPLC. Mikrochim Acta 2019; 186:103. [PMID: 30637512 DOI: 10.1007/s00604-018-3210-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 12/23/2018] [Indexed: 12/28/2022]
Abstract
The authors describe a new spherical metal-organic coordination polymer (MOCP) for use as an adsorbent in solid-phase microextraction (SPME). By applying the ions Co(II), Fe(II), Cu(II), and Zn(II) in these polymers, MOCP with different morphology were obtained. The respective coatings for SPME display different extraction efficiency towards neonicotinoid insecticides (neo-nics). The Co(II)@MOCP coating displays an improved extraction capability for neo-nics when compared to the four commercially available coatings studied. Following extraction with the Co(II)@MOCP-coated fiber, the neo-nics were eluted using 1 mL of trifluoroacetic acid/acetonitrile solution and quantified by high performance liquid chromatography. The method, when applied to spiked honey samples, has good linearity (0.5-600 μg kg-1) and a low limit of detection (0.05-0.15 μg kg-1). The precision (n = 6) for a single fiber was in the range of 3.6-8.3%. The reproducibility (for n = 5) from fiber-to-fiber ranges between 5.4 and 8.8%. The Co(II)@MOCP-coated fiber can be reused more than 80 times without any apparent reduction in its performance. In addition, the relative recoveries from spiked honey samples are very good (91.5%-103.5%). Graphical abstract A spherical metal-organic coordination polymer (MOCP) was synthesized under the regulation of Co(II) and used for the solid-phase microextraction (SPME) of neonicotinoid insecticides found in honey.
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Asfaw AA, Aspromonte J, Wolfs K, Van Schepdael A, Adams E. Overview of sample introduction techniques prior to GC for the analysis of volatiles in solid materials. J Sep Sci 2018; 42:214-225. [DOI: 10.1002/jssc.201800711] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 09/28/2018] [Accepted: 09/29/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Adissu Alemayehu Asfaw
- Department of Pharmaceutical and Pharmacological Sciences; Pharmaceutical Analysis; KU Leuven - University of Leuven; Leuven Belgium
- College of Health Sciences; Department of Pharmacy; Mekelle University; Mekelle Ethiopia
| | - Juan Aspromonte
- Department of Pharmaceutical and Pharmacological Sciences; Pharmaceutical Analysis; KU Leuven - University of Leuven; Leuven Belgium
| | - Kris Wolfs
- Department of Pharmaceutical and Pharmacological Sciences; Pharmaceutical Analysis; KU Leuven - University of Leuven; Leuven Belgium
| | - Ann Van Schepdael
- Department of Pharmaceutical and Pharmacological Sciences; Pharmaceutical Analysis; KU Leuven - University of Leuven; Leuven Belgium
| | - Erwin Adams
- Department of Pharmaceutical and Pharmacological Sciences; Pharmaceutical Analysis; KU Leuven - University of Leuven; Leuven Belgium
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