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Journal of Analytical Methods in Chemistry

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https://www.readbyqxmd.com/read/30079260/analysis-of-the-hplc-fingerprint-and-qams-for-sanhuang-gypsum-soup
#1
Yi Peng, Minghui Dong, Jing Zou, Zhihui Liu
A valid and encyclopaedic evaluation method for assessing the quality of Sanhuang Gypsum Soup (SGS) has been set up based on analysis of high-performance liquid chromatography (HPLC) fingerprint combined with the quantitative analysis of multicomponents by single marker (QAMS) method, hierarchical cluster analysis (HCA), and similarity analysis. 20 peaks of the common model were obtained and used for the similarity analysis and HCA analysis. Berberine was selected as an internal reference, and the relative correction factors of mangiferin, geniposide, liquiritin, epiberberine, coptisine, baicalin, palmatine, harpagosid, wogonoside, cinnamic acid, cinnamic aldehyde, baicalein, glycyrrhizic acid, and wogonin were established...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/30079259/a-convenient-and-sensitive-lc-ms-ms-method-for-simultaneous-determination-of-carbadox-and-olaquindox-related-residues-in-swine-muscle-and-liver-tissues
#2
Heying Zhang, Wei Qu, Yanfei Tao, Dongmei Chen, Shuyu Xie, Lingli Huang, Zhenli Liu, Yuanhu Pan, Zonghui Yuan
This paper presents a convenient and sensitive LC-MS/MS method for the simultaneous determination of carbadox and olaquindox residues, including desoxyolaquindox (DOLQ), desoxycarbadox (DCBX), quinoxaline-2-carboxylic acid (QCA), 3-methyl-quinoxaline-2-carboxylic acid (MQCA), and the glycine conjugates of QCA and MQCA (namely, QCA-glycine and MQCA-glycine, resp.) in swine muscle and liver tissues. Tissue samples were extracted with 2% metaphosphoric acid in 20% methanol and cleaned up by solid-phase extraction (SPE) on a mixed-mode anion-exchange column (Oasis MAX)...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/30046508/determination-of-%C3%AE-agonist-residues-in-animal-derived-food-by-a-liquid-chromatography-tandem-mass-spectrometric-method-combined-with-molecularly-imprinted-stir-bar-sorptive-extraction
#3
Jiwang Tang, Jianxiu Wang, Shuyun Shi, Shengqiang Hu, Liejiang Yuan
A novel clenbuterol molecularly imprinted polymer (MIP)-coated stir bar was prepared and applied to the determination of six β -agonists in animal-derived food. Characterization and various parameters affecting adsorption and desorption behaviours were investigated. The extraction capacities of clenbuterol, salbutamol, ractopamine, mabuterol, brombuterol, and terbutaline for MIP coating were 3.8, 2.9, 3.1, 3.5, 3.2, and 3.3 times higher, respectively, than those of the NIP coating, respectively. The method of MIP-coated SBSE coupled with HPLC-MS/MS was developed...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/30046507/one-step-solid-extraction-for-simultaneous-determination-of-eleven-commonly-used-anticancer-drugs-and-one-active-metabolite-in-human-plasma-by-hplc-ms-ms
#4
Shouhong Gao, Zhengbo Tao, Jingya Zhou, Zhipeng Wang, Yunlei Yun, Mingming Li, Feng Zhang, Wansheng Chen, Yejun Miao
Therapeutic drug monitoring for anticancer drugs could timely reflect in vivo drug exposure, and it was a powerful tool for adjusting and maintaining drug concentration into a reasonable range, so that an enhanced efficacy and declined adverse reactions could be achieved. A liquid chromatography-tandem mass spectrometry method had been developed and fully validated for simultaneous determination of paclitaxel, docetaxel, vinblastine, vinorelbine, pemetrexed, carboplatin, etoposide, cyclophosphamide, ifosfamide, gemcitabine, irinotecan, and SN-38 (an active metabolite of irinotecan) in human plasma from cancer patients after intravenous drip of chemotherapy drugs...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/30013808/srm-ms-method-development-for-hepcidin-25-peptide
#5
Kyung-Cho Cho, Byoung-Kyu Cho, Jin Woo Jung, Ye Ji Lee, Eun Bong Lee, Eugene C Yi
As advanced mass spectrometry- (MS-) based hepcidin analysis offers to overcome the limitations in analytical methods using antihepcidin, further improvement of MS detection sensitivity for the peptide may enhance the diagnostic value of the hepcidin for various iron-related disorders. Here, improved MS detection sensitivity of hepcidin has been achieved by reducing the disulfide bonds in hepcidin, by which proton accessibility increased, compared to the intact hepcidin peptide. Comparing the ionization efficiencies of reduced and nonreduced forms of hepcidin, the reduced form of hepcidin showed an increase in ionization efficiency more than two times compared to the nonreduced form of hepcidin...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/30013807/benzo-g-coumarin-based-fluorescent-probes-for-bioimaging-applications
#6
REVIEW
Yuna Jung, Junyang Jung, Youngbuhm Huh, Dokyoung Kim
Benzo[ g ]coumarins, which consist of coumarins fused with other aromatic units in the linear shape, have recently emerged as an interesting fluorophore in the bioimaging research. The pi-extended skeleton with the presence of electron-donating and electron-withdrawing substituents from the parent coumarins changes the basic photophysical parameters such as absorption and fluorescence emission significantly. Most of the benzo[ g ]coumarin analogues show red/far-red fluorescence emission with high two-photon absorbing property that can be applicable for the two-photon microscopy (TPM) imaging...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29992079/development-of-global-chemical-profiling-for-quality-assessment-of-ganoderma-species-by-chempattern-software
#7
Hui Zhang, Huijie Jiang, Xiaojing Zhang, Shengqiang Tong, Jizhong Yan
Triterpenoids are the major secondary metabolites and active substances in Ganoderma , considered as the "marker compounds" for the chemical evaluation or standardization of Ganoderma . A response surface methodology was used to optimize the ultrasonic-assisted extraction of triterpenoids. The extraction rate was 7.338 ± 0.150 mg/g under the optimum conditions: 87% ethanol, ratio of solid to liquid (w : v) 1 : 28, and ultrasound extraction time 36 min. Based on the high sensitivity and selectivity of HPLC-LTQ-Orbitrap-MS n , 24 components of triterpenoids were tentatively identified in the negative mode...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29977642/rapid-identification-and-simultaneous-quantification-of-aristolochic-acids-by-hplc-dad-and-confirmations-by-ms-in-aristolochia-chilensis-using-a-limited-biomass
#8
Michael Araya, Samantha García, Marcia González-Teuber
Six aristolochic acids were identified in the Chilean species Aristolochia chilensis using high-performance liquid chromatography coupled to a diode array detector (HPLC-DAD) and subsequent confirmation with mass spectrometry (MS). The fractions of each signal were collected and injected directly into an Orbitrap mass detector model Q Exactive Focus (Thermo Scientific). The acids extraction was done with 0.10-0.50 g of lyophilized and pulverized sample and concentrated in Soxhlet extraction equipment. The liquid-liquid separations and a subsequent solid phase extraction (SPE) C18 were performed using 100  µ L of the extract that contains the aristolochic acids present in the Aristolochia chilensis plant...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29967713/characterization-and-botanical-differentiation-of-monofloral-and-multifloral-honeys-produced-in-cyprus-greece-and-egypt-using-physicochemical-parameter-analysis-and-mineral-content-in-conjunction-with-supervised-statistical-techniques
#9
Ioannis K Karabagias, Artemis P Louppis, Stavros Kontakos, Chryssoula Drouza, Chara Papastephanou
Thirty-four honey samples donated by beekeepers and purchased from supermarkets were collected during harvesting years 2010-2014 from Cyprus, Greece, and Egypt. The aims of this study were to characterize honey samples and, if possible, to differentiate honeys according to the honey type on the basis of physicochemical parameter values, mineral content, and their combination using supervised statistical techniques (linear discriminant analysis (LDA)). Physicochemical parameters (colour, pH, free acidity, total dissolved solids, salinity, electrical conductivity, and moisture content) were determined according to official methods, while minerals (Al, As, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Hg, Mg, Mn, Mo, Ni, P, Pb, Sb, Si, Ti, Tl, V, and Zn) using inductively coupled plasma optical emission spectrometry...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29967712/establishing-analytical-performance-criteria-for-the-global-reconnaissance-of-antibiotics-and-other-pharmaceutical-residues-in-the-aquatic-environment-using-liquid-chromatography-tandem-mass-spectrometry
#10
Luisa F Angeles, Diana S Aga
The occurrence of antibiotics in the environment from discharges of wastewater treatment plants (WWTPs) and from the land application of antibiotic-laden manure from animal agriculture is a critical global issue because these residues have been associated with the increased emergence of antibiotic resistance in the environment. In addition, other classes of pharmaceuticals and personal care products (PPCPs) have been found in effluents of municipal WWTPs, many of which persist in the receiving environments...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29967711/solid-liquid-separation-properties-of-thermoregulated-dicationic-ionic-liquid-as-extractant-of-dyes-from-aqueous-solution
#11
Rui Lv, Shuya Cui, Yangmei Zou, Li Zheng
Two thermoregulated dicationic ionic liquids were synthesized and applied for effective extraction of the common dye malachite green oxalate (MG). The extraction parameters such as amount of ionic liquids, pH of water phase, extraction time, cooling time, and centrifugal time on the extraction efficiency were investigated systematically. It revealed that the dye has been successfully extracted into the ionic liquids, with high extraction efficiency higher than 98%, and recovery of 98.2%-100.8%, respectively...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29967710/development-of-an-enzyme-linked-immunosorbent-assay-and-gold-labelled-immunochromatographic-strip-assay-for-the-detection-of-ancient-wool
#12
Bing Wang, Jincui Gu, Boyi Chen, Chengfeng Xu, Hailing Zheng, Zhiqin Peng, Yang Zhou, Zhiwen Hu
The identification of ancient wool is of great importance in archaeology. Despite lots of meaningful information can be achieved by conventional detection methods, that is, light and electron microscopy, spectroscopy, and chromatography, the efficacy is likely to be limited in the detection of ancient samples with contamination or severe degradation. In this work, an immunoassay was proposed and performed for the identification of ancient wool. First, a specific antibody, which has the benefits of low cost, easy operation, and extensive applicability, was developed directly through immunizing rabbits with complete antigen (keratin)...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29888027/nmr-novel-pharmacological-and-in-silico-docking-studies-of-oxyacanthine-and-tetrandrine-bisbenzylisoquinoline-alkaloids-isolated-from-berberis-glaucocarpa-roots
#13
Muhammad Alamzeb, Muhammad Omer, Mamoon Ur-Rashid, Muslim Raza, Saqib Ali, Behramand Khan, Asad Ullah
Urease enzyme is responsible for gastric cancer, peptic ulcer, hepatic coma, and urinary stones in millions of people across the world. So, there is a strong need to develop new and safe antiurease drugs, particularly from natural sources. In search for new and effective drugs from natural sources bioassay-guided fractionation and isolation of Berberis glaucocarpa Stapf roots bark resulted in the isolation and characterization, on the basis of 1D and 2D NMR data, of two bisbenzylisoquinoline alkaloids, oxyacanthine ( 1 ) and tetrandrine ( 2 ), followed by urease inhibition studies...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29888026/development-and-validation-of-a-versatile-uplc-pda-method-for-simultaneous-determination-of-paracetamol-tizanidine-aceclofenac-and-nimesulide-in-their-new-combinations
#14
Sami Bawazeer, Khalid M Badr El-Din, Ahmed M Abdel-Megied
A simple, rapid, and validated UPLC method was developed for the simultaneous quantitation of paracetamol (PAR), tizanidine (TIZ), aceclofenac (ACF), and nimesulide (NIM) either in pure forms or in their different tablet dosage forms. Chromatographic separation was attained on an ACQUITY UPLC™ BEH C18 column (100 mm × 2.1 mm, 1.7  μ m) with a mobile phase consisting of 20 mM phosphate buffer (pH 7.0) : acetonitrile in the proportion (60 : 40 v / v ) isocratically pumped at a flow rate of 1...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29888025/lc-ms-ms-method-for-simultaneous-quantification-of-dexmedetomidine-dezocine-and-midazolam-in-rat-plasma-and-its-application-to-their-pharmacokinetic-study
#15
Wenjuan Cui, Qin Liu, Shan Xiong, Lujun Qiao
A simple, sensitive, and accurate LC-MS/MS method was established and validated for the simultaneous quantification of dexmedetomidine, dezocine, and midazolam in rat plasma. Chromatographic separation was achieved on a C18 column (50 mm × 2.1 mm, 3  µ m) using a mobile phase composed of water (containing 0.1% formic acid) and acetonitrile. The lower limits of quantification were 0.1, 0.1, and 0.2 ng/mL for dexmedetomidine, dezocine, and midazolam in rat plasma, respectively. The analytes were determined with selected reaction monitoring under positive ionization mode...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29888024/comparison-between-different-extraction-methods-for-determination-of-primary-aromatic-amines-in-food-simulant
#16
Morteza Shahrestani, Mohammad Saber Tehrani, Shahram Shoeibi, Parviz Aberoomand Azar, Syed Waqif Husain
The primary aromatic amines (PAAs) are food contaminants which may exist in packaged food. Polyurethane (PU) adhesives which are used in flexible packaging are the main source of PAAs. It is the unreacted diisocyanates which in fact migrate to foodstuff and then hydrolyze to PAAs. These PAAs include toluenediamines (TDAs) and methylenedianilines (MDAs), and the selected PAAs were 2,4-TDA, 2,6-TDA, 4,4'-MDA, 2,4'-MDA, and 2,2'-MDA. PAAs have genotoxic, carcinogenic, and allergenic effects. In this study, extraction methods were applied on a 3% acetic acid as food simulant which was spiked with the PAAs under study...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29862124/development-of-an-ultra-high-performance-liquid-chromatography-method-for-simultaneous-determination-of-six-active-compounds-in-fructus-aurantii-and-rat-plasma-and-its-application-to-a-comparative-pharmacokinetic-study-in-rats-administered-with-different-doses
#17
Wenbo Wang, Linlin Zhao, Huiyong Huang, Jiamei Yao, Lu Zhou, Dongsheng Wang, Xinjian Qiu
A rapid, accurate, and sensitive ultra-high performance liquid chromatography (UHPLC) method was established for simultaneously detecting naringin, hesperidin, neohesperidin, meranzin hydrate, naringenin, and hesperetin in Fructus aurantii (FA) decoction. Analysis was performed on Waters BEH (R) C18 (50 mm × 2.1 mm, 1.7  μ m) at a flow rate of 0.2 mL/min by using (A) acetonitrile and (B) 0.5% acetic acid-water as the mobile phase. The method was well validated on linearity, precision, recoveries, and stability...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29862123/the-simultaneous-voltammetric-determination-of-aflatoxins-%C3%B0-1-and-%C3%B0-1-on-a-glassy-carbon-electrode
#18
G B Slepchenko, T M Gindullina, M A Gavrilova, A Zh Auelbekova
For the first time, the possibility of using stripping voltammetry for the simultaneous determination of aflatoxins В1 and М1 on a glassy-carbon electrode has been shown. The influence of various factors ( Е э , τ э , w , and the nature of the background electrolyte) on the potential and magnitude of the oxidation current of mycotoxins has been estimated. Working conditions for voltammetric determination and reproducibility of analytical signals for two mycotoxins have been selected. The mutual influence of aflatoxins В1 and М1 on the value of analytical signals in their simultaneous presence has been studied...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29862122/sensing-of-vascular-permeability-in-inflamed-vessel-of-live-animal
#19
Sang A Park, Soi Jeong, Young Ho Choe, Young-Min Hyun
Increase in vascular permeability is a conclusive response in the progress of inflammation. Under controlled conditions, leukocytes are known to migrate across the vascular barriers to the sites of inflammation without severe vascular rupture. However, when inflammatory state becomes excessive, the leakage of blood components may occur and can be lethal. Basically, vascular permeability can be analyzed based on the intensity of blood outflow. To evaluate the amount and rate of leakage in live mice, we performed cremaster muscle exteriorization to visualize blood flow and neutrophil migration...
2018: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29862121/-%C3%AE-amylase-and-%C3%AE-glucosidase-inhibitory-activities-of-chemical-constituents-from-wedelia-chinensis-osbeck-merr-leaves
#20
Nguyen Phuong Thao, Pham Thanh Binh, Nguyen Thi Luyen, Ta Manh Hung, Nguyen Hai Dang, Nguyen Tien Dat
As part of an ongoing search for new natural products from medicinal plants to treat type 2 diabetes, two new compounds, a megastigmane sesquiterpenoid sulfonic acid ( 1 ) and a new cyclohexylethanoid derivative ( 2 ), and seven related known compounds ( 3-9 ) were isolated from the leaves of Wedelia chinensis (Osbeck.) Merr. The structures of the compounds were conducted via interpretation of their spectroscopic data (1D and 2D NMR, IR, and MS), and the absolute configurations of compound 1 were determined by the modified Mosher's method...
2018: Journal of Analytical Methods in Chemistry
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