Journal of Chromatography A
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#1Dean Lee (IFF: International Flavors & Fragrances)
#2Yucheng Zhu (IFF: International Flavors & Fragrances)
Last. Elizabeth Tocce (IFF: International Flavors & Fragrances)
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Abstract null null This study investigated the experimental conditions needed to obtain molecular weight distribution (MWD) of ultrahigh MW poly(ethylene oxide) (PEO) using size exclusion chromatography (SEC) hyphenated with a multiangle light scattering photometer (MALS) and a differential refractive index detector (RI). Ultrahigh MW components yielded non-linear angular dependency in scattered light intensities. The first-order linear fitting using Zimm formalism resulted in significant differ...
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#1Ali Moussa (VUB: Vrije Universiteit Brussel)H-Index: 2
#2Thomas Lauer (Gustavus Adolphus College)H-Index: 1
Last. Ken Broeckhoven (VUB: Vrije Universiteit Brussel)H-Index: 24
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Abstract null null Currently, the shape and variance of the analyte band entering the second dimension column when injected from an open loop interface in two-dimensional liquid chromatography is not fully understood. This is however important as it is connected to several other variables encountered when developing 2D-LC methods, including the first dimension flow rate, the sampling (modulation) time and the loop volume. Both numerical simulation methods and experimental measurements were used ...
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#1Lijuan Zang (WHU: Wuhan University)H-Index: 1
#2Man He (WHU: Wuhan University)H-Index: 58
Last. Bin Hu (WHU: Wuhan University)H-Index: 81
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Abstract null null In this study, spherical imine-linked covalent organic frameworks (COFs) were fabricated from 2,5-dimethoxybenzene-1,4-dialdehyde (DMTP) and 1,3,5-tris (4-aminophenyl) benzene (TAPB) and named as TAPB-DMTP-COFs. The resulting powders were coated onto bare glass bars via physical-adhesion to obtain TAPB-DMTP-COFs coated stir bars. The self-made stir bars exhibited higher extraction efficiency (74–85%) and faster dynamics (50 min) towards non-steroidal anti-inflammatory drugs (N...
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#1Kalpana Talari (Government College)
#2Sai Krishna Ganji (IICT: Indian Institute of Chemical Technology)H-Index: 1
Last. Vijayasarathi V. R. Upadhyayula (IICT: Indian Institute of Chemical Technology)H-Index: 3
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Abstract null null Quantitative determination of targeted and untargeted pesticide residues from food products is very important for the assessment of safety of the food products. In the present work, a simple, selective and sensitive method based on liquid chromatography atmospheric pressure chemical ionization high energy collisional dissociation high-resolution tandem mass spectrometry (LC-APCI-HCD-HRMS/MS) for quantification of 19 priority organophosphorus and carbamate pesticides and 10 unt...
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#1Yajing Hou (XJTU: Xi'an Jiaotong University)H-Index: 8
#2Jiayu Lu (XJTU: Xi'an Jiaotong University)H-Index: 2
Last. Langchong He (XJTU: Xi'an Jiaotong University)H-Index: 31
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Abstract null null Mas-related G protein-coupled receptor X2 (MrgX2) has been identified to be critical in drug-induced pseudo-allergic reactions and allergic diseases. Herein, an affinity high-performance liquid chromatography was established for the specific detection and enrichment of MrgX2. Substance P was used as an affinity ligand and immobilized on a glutaraldehyde-modified amino silica gel. The successful grafting of substance P was characterized by infrared spectroscopy, elemental analy...
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#1Chunmiao Bo (MUC: Minzu University of China)
#2Yan Li (MUC: Minzu University of China)
Last. Bolin Gong (MUC: Minzu University of China)H-Index: 7
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Abstract null null A strategy is proposed to develop a stationary phase for hydrophilic interaction liquid chromatography (HILIC) using the synergistic effect of polyhedral oligomeric silsesquioxane (POSS) and copolymer brushes. Octahedral octa-aminopropylsisesquioxane (8NH2-POSS) was first bound to silica gel, followed by bromination to form a cubic initiator. Then, using acrylamide (AM) and dihydroxypropyl methacrylate (DPMA) as mixed monomers, surface initiated-atom transfer radical polymeriz...
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#1Kyun-Il RahH-Index: 2
#2Jaeyeong Choi (Hannam University)H-Index: 6
Last. Seungho Lee (Hannam University)H-Index: 21
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In this report, we put forward an experimental method to determine the ionic strength of an aqueous solution. To this end, we have developed a theory of ionic strength I expressed in terms of the retention ratios in field-flow fractionation (FFF) as I1/2=κ(1-R)/(1-Ro)-e-1/2. Here R is a measured retention ratio using an FFF technique, for instance, sedimentation FFF (SdFFF), and Ro is the sterically-corrected standard retention ratio as given by the standard retention theory (SRT) for a latex pa...
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#1Sarah Nakhodchi (TMU: Tarbiat Modares University)H-Index: 1
#2Naader Alizadeh (TMU: Tarbiat Modares University)H-Index: 31
Abstract null null Ketamine (Ket) and midazolam (Mdz) are among well-known anesthetic agents which frequently coadministered in surgical procedures and emergency department. Only a few reports have been published for the simultaneous analysis of these compounds. In the present study, we reported a simple, sensitive, and rapid method for simultaneous determination of Ket and Mdz based on headspace solid-phase microextraction coupled with ion mobility spectrometry (HS-SPME-IMS). Ion mobility spect...
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#1Mingming Xu (Agricultural University of Hebei)H-Index: 2
#2Xinying Luo (Agricultural University of Hebei)
Last. Chun Wang (Agricultural University of Hebei)H-Index: 61
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ABSTRACT null null Food safety is a great concern of the general public. Chlorophenols (CPs) as organic pollutant can be found in drinking water and foods, causing serious harm to human health. Herein, imine-linked covalent organic frameworks (COFs), named as TAPT-AN-COF, was synthesized by aniline modulation strategy through condensation of 1,3,5-triformylphoroglucinol and 4,4′,4′'-(1,3,5-Triazine-2,4,6-triyl)trianiline with aniline as modulator. The prepared TAPT-AN-COF possesses good crystall...
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#1Ruijuan Duan (BIT: Beijing Institute of Technology)
#2Meiling Qi (BIT: Beijing Institute of Technology)H-Index: 15
Abstract null null This work presents the investigation of using the amphiphilic triblock copolymer composed of poly(ethylene oxide)(PEO)-poly(propylene oxide) (PPO)-poly(ethylene oxide) (PEO) (denoted as EPE) as the stationary phase for gas chromatographic (GC) analyses. The EPE capillary column exhibited moderate polarity and column efficiency of 4348 plates/m determined by naphthalene at 120 °C (k = 11.52). Different from the PEG and polysiloxane homopolymers, it showed high-resolution perfor...
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