Impact of COVID-19 Control Measures on Trace Gases (NO2, HCHO and SO2) and Aerosols over India during Pre-monsoon of 2020 by Mriganka Sekhar Biswas, D. C. Ayantika

“…During April–May the lockdown have resulted in a net decrease in NO2 column density over India in 2020 compared to 2017–2019 average for the same months. …”
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Sequential separation of anti-diabetic drugs in the presence of melamine as impurity using chromatographic methods by Maimana A. Magdy, Maha M. Abdelrahman, Doaa G. Mohamed, Amal B. Ahmed

“…In this method, a C18 column was utilized for the separation process. The mobile phase was made up of a mix of methanol and 0.01 M sodium dodecyl sulfate, with a pH of 3.3 achieved by adding orthophosphoric acid. …”
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Determination of Carrageenan in Livestock and Poultry Meat by Ultrahigh-Performance Liquid Chromatography-Tandem Mass Spectrometry by Yanqin Sun, Xudong Zhu, Xixi Shen, Wei Wang

“…Chromatographic separation was performed on an ACQUITY UPLC BEH HILIC C18 column (2.1 mm × 50 mm, 1.7 μm) using a gradient elution with methanol and 0.1% (v/v) formic acid in water as a mobile phase. …”
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Phenolic Compounds from Ocimum basilicum Revealed as Antibacterial by Experimental and Computational Screening-Based Studies against Oral Infections by Salsabila Aqila Putri, Euis Julaeha, Natsuko Kagawa, Dikdik Kurnia

“…Isolation of phenolic compounds 1–4 was carried out by bioactivity guided using column chromatography. Methylparaben (1), methyl protocatechuate (2), caffeic acid (3), and methyl caffeate (4) were characterized by 1D and 2D-NMR. …”
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Determination of Levetiracetam in Human Plasma by Dispersive Liquid-Liquid Microextraction Followed by Gas Chromatography-Mass Spectrometry by Greyce Kelly Steinhorst Alcantara, Leandro Augusto Calixto, Luiz Alberto Beraldo de Moraes, Regina Helena Costa Queiroz, Anderson Rodrigo Moraes de Oliveira, Cristiane Masetto de Gaitani

“…GC-MS analyses were carried out using a linear temperature program, capillary fused silica column, and helium as the carrier gas. DLLME optimized parameters were type and volume of extraction and dispersing solvents, salt addition, and vortex agitation time. …”
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Antimicrobial Activity of Aspergillus sp. from the Amazon Biome: Isolation of Kojic Acid by Josy Caldas Rodrigues, Weison Lima da Silva, David Ribeiro da Silva, Carolina Rabelo Maia, Clarice Virginia Santos Goiabeira, Haile Dean Figueiredo Chagas, Gigliola Mayara Ayres D’Elia, Gleica Soyan Barbosa Alves, Viviane Zahner, Cecilia Veronica Nunez, Ormezinda Celeste Cristo Fernandes

“…The extract was subjected to thin layer chromatography (TLC) and fractionated by open and semipreparative column chromatography. The fractions of interest had their chemical constituents elucidated by nuclear magnetic resonance and mass spectrometry. …”
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Adsorption and Desorption Characteristics and Purification of Isoflavones from Crude Soybean Extract Using Macroporous Resins by Thi Ngoc Thu Tran, Xuan Vung Bui, Nguyen Thi Truc Loan, Nguyen Huu Thuan Anh, Truong Dang Le, Thi Minh Hanh Truong

“…The dynamic adsorption conditions for the purification process of isoflavones on the D101 resin-packed column were selected at the bed volume (BV) of 200 mL, feed volume of 3.75 BV, and flow rate of 1.5 BV/h. …”
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Simultaneous Quantification of Six Bioactive Components in Decoction of Ziziphi spinosae Semen Using Ultrahigh Performance Liquid Chromatography Coupled with Triple-Quadrupole Mass... by Xiao Liu, Xiaochai Zhu, Hui Zhu, Li Xie, Jia Ma, Yinghui Xu, Qigang Zhou, Zejun Wu, Baochang Cai

“…Analysis was performed on an Agilent ZORBAX Extend-C18 column (2.1 × 100 mm, 1.8 μm) and eluted with a mobile phase system consisting of acetonitrile and water under a gradient program with a flow rate of 0.3 ml/min. …”
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A Sensitive and Selective Method for Determination of Aesculin in Cortex Fraxini by Liquid Chromatography Quadrupole Time-of-Flight Tandem Mass Spectrometry and Application in Phar... by Yi Li, Hui Guo, Yinying Wu, Qianqian Geng, Danfeng Dong, Huili Wu, Enxiao Li

“…Chromatographic separation was performed on a reverse phase column. A tandem mass spectrometric detection with an electrospray ionization (ESI) interface was achieved using collision-induced dissociation (CID) under positive ionization mode. …”
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Synthesis and Spectroscopic and Biological Activities of Zn(II) Porphyrin with Oxygen Donors by Gauri Devi Bajju, Sujata Kundan, Madhulika Bhagat, Deepmala Gupta, Ashu Kapahi, Geeta Devi

“…The four-coordinated zinc porphyrin accepts one axial ligand in 1 : 1 molar ratio to form five-coordinated complex, which is purified by column chromatography and characterized by physicochemical, biological evaluation and TGA/DTA studies. …”
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Efficiency of Polyphenol Extraction from Artificial Honey Using C18 Cartridges and Amberlite® XAD-2 Resin: A Comparative Study by Chua Yung An, Md. Murad Hossain, Fahmida Alam, Md. Asiful Islam, Md. Ibrahim Khalil, Nadia Alam, Siew Hua Gan

“…A gradient high performance liquid chromatography system with an RP18 column and photodiode array detector was utilized to analyze the extracted polyphenols. …”
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Simultaneous Determination of 34 Amino Acids in Tumor Tissues from Colorectal Cancer Patients Based on the Targeted UHPLC-MS/MS Method by Yang Yang, Feng Zhang, Shouhong Gao, Zhipeng Wang, Mingming Li, Hua Wei, Renqian Zhong, Wansheng Chen

“…The chromatographic separation was achieved on an Agilent ZORBAX SB-C18 column (3.0 × 150 mm, 5 μm) with a binary gradient elution system (A, 0.02% heptafluorobutyric acid and 0.2% formic acid in water, v/v; B, methanol). …”
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Spatiotemporal Characteristics of Extreme Precipitation and Its Future Trend Analysis in Huaihe River Basin by GUO Wei, YE Wen, ZHU Xuchao, WU Wei, WANG Lu, GAO Huamin, ZHANG Haiming, SHI Shaohui

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A Validated Volumetric Absorptive Microsampling-Liquid Chromatography Tandem Mass Spectrometry Method to Quantify Doxycycline Levels in Urine: An Application to Monitor the Malaria... by Mylène Penot, Cyril Linard, Nicolas Taudon

“…The chromatographic separation was achieved on a core-shell C18 column. The mean extraction recovery was 109% (mean RSD, 5.4%, n = 6) for doxycycline and 102% (mean RSD, 7.0%) for the internal standard. …”
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Mycorrhizal fungi mitigate cadmium leaching losses by decreasing the inorganic cadmium proportion in soil solutions by Wei Li, Jiong Wu, Jie Yan, Xinran Liang, Xiaoyi Li, Yongmei He, Bo Li, Fangdong Zhan

“…The adsorption of Cd ions by quartz sand increased with the application of GRSP and LMWOAs, which resulted in a 27.6 %–69.5 % reduction in Cd leaching loss in the sand column. In the soil with AMF, the proportion of organic-bound Cd increased and the proportion of inorganic-bound Cd decreased by promoting the secretion of LMWOAs via mycelium, thus reducing Cd leaching loss.…”
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Two chromatographic methods for analyzing paracetamol in spiked human plasma with its toxic metabolite, N-acetyl parabenzoquinone imine and its antidote, N-acetyl-l-cysteine by Omar M El-Abassy, Michael Gamal Fawzy, Ebraam B. Kamel

“…The stationary phase used in the approach was a C18 column. Analytes quantification was established utilizing a UV detector operating at a wavelength of 254 nm. …”
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Biomarker Profiling for Pyridoxine Dependent Epilepsy in Dried Blood Spots by HILIC-ESI-MS by Elizabeth Mary Mathew, Sudheer Moorkoth, Leslie Lewis, Pragna Rao

“…The samples were extracted using methanol and analysed on a iHILIC fusion plus column with formic acid buffer (pH 2.5): acetonitrile (20:80) at a flow rate of 0.5 mL/min within 3 minutes. …”
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Pharmacokinetics and Bioavailability Study of Tubeimoside I in ICR Mice by UPLC-MS/MS by Lianguo Chen, Qinghua Weng, Feifei Li, Jinlai Liu, Xueliang Zhang, Yunfang Zhou

“…Chromatographic separation was performed on a UPLC BEH C18 column (2.1 mm × 50 mm, 1.7 μm). The mobile phase consisted of water with 0.1% formic acid and methanol (1 : 1, v/v) at a flow rate of 0.4 mL/min. …”
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A liquid chromatography-high-resolution mass spectrometry method for separation and identification of hemoglobin variant subunits with mass shifts less than 1 Da by Ainslie Chen, Ryan M. Aquino, Hector A. Vidal, Carolyn V. Wong, Ruben Y. Luo

“…LC separation was facilitated by a C4 reversed-phase column. Results: Seven heterozygous Hb variant samples (Hb C with α-thalassemia trait, Hb E, Hb D-Punjab, Hb G-Accra, Hb G-Siriraj, Hb Tarrant, and Hb G-Waimanalo) were selected to demonstrate the LC separation of Hb variant and normal subunits with mass shifts of less than 1 Da. …”
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Investigating the Efficiency of Coffee Husks in Bio-Retention Model for Storm Water Treatment. by Musasizi, Joseph

“…The physical bioretention model of four Columns: J, M, N and P of 102 mm diameter and 1050mm height was developed. …”
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