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Journal of Chromatographic Science

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https://www.readbyqxmd.com/read/28203809/a-tlc-direct-bioautography-method-for-detection-of-antiurolithiatic-metabolites
#1
Anita Surendra Patil, Hariprasad Madhukarrao Paikrao, Ankit Subhash Kale, Surendra Raghoba Manik
No abstract text is available yet for this article.
February 16, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28203774/novel-chromatographic-methods-for-simultaneous-quantification-of-fish-and-wheat-germ-oils-mixture-in-pharmaceutical-dosage-forms
#2
Amira F El-Yazbi, Amr El-Hawiet
No abstract text is available yet for this article.
February 16, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28203764/two-dimensional-model-for-reactive-sorption-columns-of-cylindrical-geometry-analytical-solutions-and-moment-analysis
#3
Farman U Khan, Shamsul Qamar
No abstract text is available yet for this article.
February 16, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28203760/determination-of-alkaloid-contents-in-various-tissues-of-coptis-chinensis-franch-by-reversed-phase-high-performance-liquid-chromatography-and-ultraviolet-spectrophotometry
#4
Yanfang Yang, Jingling Peng, Fangping Li, Xin Liu, Meng Deng, Hezhen Wu
No abstract text is available yet for this article.
February 16, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28203815/determination-of-escitalopram-oxalate-and-l-methylfolate-in-tablet-by-spectrophotometric-and-reverse-phase-high-performance-liquid-chromatographic-methods
#5
Seema Sheladia, Bhavesh Patel
No abstract text is available yet for this article.
February 14, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28203771/a-rapid-uplc-method-for-simultaneous-analysis-of-caffeine-and-13-index-polyphenols-in-black-tea
#6
Hai-Bo Pan, Dan Zhang, Bo Li, Yuan-Yuan Wu, You-Ying Tu
No abstract text is available yet for this article.
February 14, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28168304/simultaneous-determination-of-cinchocaine-hydrochloride-and-betamethasone-valerate-in-presence-of-their-degradation-products
#7
Ahmed S Fayed, Mamdouh R Rezk, Hoda M Marzouk, Samah S Abbas
No abstract text is available yet for this article.
February 7, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28168284/quantification-and-in-silico-toxicity-assessment-of-nimesulide-and-its-related-substances
#8
Nvvss Narayana Murty Nagulakonda, Ravi Shekar Ananthula, Krishna Phani Chandra Susarla, T Krishnamurthy, Nageswara Rao Gollapalli
No abstract text is available yet for this article.
February 7, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28164242/matrix-solid-phase-dispersion-based-on-carbon-nanotube-coupled-with-dispersive-liquid-liquid-microextraction-for-determination-of-organochlorine-pesticides-in-soil
#9
Ali Ghadiri, Amir Salemi
No abstract text is available yet for this article.
February 6, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28158569/rp-hptlc-data-in-correlation-studies-of-a-5-arylidene-2-4-thiazolidinedione-derivatives
#10
Tatjana Djaković Sekulić, Adam Smoliński
No abstract text is available yet for this article.
February 1, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28115391/determination-of-miroestrol-and-isomiroestrol-from-pueraria-mirifica-white-kwao-krua-in-dietary-supplements-by-lc-ms-ms-and-lc-q-orbitrap-ms
#11
Ji Hyun Lee, Jung Yeon Kim, So-Hyun Cho, Ji Hye Jeong, Sooyeul Cho, Hyoung Joon Park, Sun Young Baek
The purpose of this study is to develop LC-MS-MS and LC-Q-Orbitrap/MS method for the analysis of the components of Pueraria mirifica, which are illegal additives in dietary supplements. Blank samples and samples spiked with miroestrol and isomiroestrol were used for the initial development and validation studies. Specificity, linearity, limit of quantification (LOQ), limit of detection (LOD), accuracy, precision, recovery and stability were employed as the validation parameters. The LODs of miroestrol and isomiroestrol were found to be 4...
January 22, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28096167/chemical-fingerprint-of-dachaihu-granule-and-its-chemical-correlation-between-raw-herbs
#12
Chunqin Mao, Yaping Zhou, De Ji, Xuanzhong Tan, Yi Tao, Wenyi Zang, Tulin Lu
To develop a method to overall evaluate the quality of Dachaihu Granule (DCHG), high-performance liquid chromatography coupled with diode array detector was used to establish chemical fingerprint of DCHG. The correlation between the formula and its raw herbs was also evaluated. According to the retention time of standard components, chemical fingerprint of DCHG was developed and a total of 21 constituents were characterized. The separation was performed on a Kromasil C18 column (250 mm × 4.6 mm i.d. with 5...
January 17, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28077432/determination-of-tetracyclines-in-bovine-milk-using-laccaic-acid-loaded-magnetite-nanocomposite-for-magnetic-solid-phase-extraction
#13
Youwei Yu, Zhefeng Fan
An efficient magnetic sorbent of laccaic acid-loaded magnetite nanocomposite was successfully synthesized for extraction and preconcentration of tetracyclines (TCs) from bovine milk sample. The synthesized nanocomposite was characterized by scanning electron microscopy and Fourier transform-infrared spectroscopy. Determination of the extracted TCs was performed by high performance liquid chromatography. Parameters affecting the efficiency of magnetic solid-phase extraction were studied and optimized. The best adsorption conditions were 80 mg of sorbent, 50 mL of sample volume, pH 7, 45°C and 20 min; the elution conditions were 0...
January 10, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28077431/enantiomers-recognition-of-propranolol-based-on-organic-inorganic-hybrid-open-tubular-mips-cec-column-using-3-trimethoxysilyl-propyl-methacrylate-as-a-cross-linking-monomer
#14
Guo-Ning Chen, Ning Li, Tian Luo, Yu-Ming Dong
In this study, 3-(trimethoxysilyl)propyl methacrylate (γ-MPS), a bifunctional group compound, was used as a single cross-linking agent to prepare molecular imprinted inorganic-organic hybrid polymers by in situ polymerization for open-tubular capillary electro chromatography (CEC) column. The optimal preparation conditions were: the ratio between template molecule and functional monomer was 1:4; the volume proportion of porogen toluene and methanol was 1:1 and the volume of cross-linking agent γ-MPS was 69 μL...
January 10, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28069691/rapid-and-sensitive-determination-of-major-active-ingredients-and-toxic-components-in-ginkgobiloba-leaves-extract-egb-761-by-a-validated-uplc-ms-ms-method
#15
Yao Wang, Yuan Liu, Qi Wu, Xin Yao, Zongqi Cheng
An accurate, precise and sensitive ultra-performance liquid chromatography tandem mass spectrometric (UPLC-MS-MS) method was developed for the determination of flavonoids, terpene lactones, together with ginkgolic acids in Ginkgo biloba leaves extract (EGb 761). This is the first report of the simultaneous analysis of major active ingredients and toxic components in EGb 761 using UPLC-MS-MS. This analysis afforded good linearity, precision, repeatability and accuracy. In addition, the content of those major bioactive components in EGb 761 prepared by different manufacturers of China was determined to establish the effectiveness of the method...
January 8, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28069690/development-of-solid-phase-extraction-and-hplc-method-for-simultaneous-estimation-of-ilaprazole-and-glimepiride-in-rat-plasma-application-to-pharmacokinetic-studies
#16
A P Dewani, A S Tripathi, P G Shelke, R L Bakal, D S Mohale, A V Chandewar
A novel, simple and mass spectrometry (MS) compatible high-performance liquid chromatography (HPLC) method is reported for the simultaneous estimation of ilaprazole (ILA) and glimepiride (GLM) in rat plasma. The bio-analytical procedure involves extraction of ILA, GLM and internal standard (IS) from rat plasma with a solid-phase extraction (SPE) process. The chromatographic analysis was performed on Waters-600 system using an isocratic mobile phase comprising methanol:water (80:20 % v/v) with pH of water modified to three using formic acid at a flow rate of 1...
January 8, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28069689/comparative-evaluation-of-raw-and-ripe-fruits-of-forsythia-suspensa-by-hplc-esi-ms-ms-analysis-and-anti-microbial-assay
#17
Jialin Qu, Xinjia Yan, Chunyan Li, Jing Wen, Chongning Lu, Jungang Ren, Ying Peng, Shaojiang Song
A multi-component quantification fingerprint based on high-performance liquid chromatography coupled with electrospray ionization tandem mass spectrometry technique has been established for the comparative analysis of raw and ripe fruits of Forsythia suspensa originated from different provinces. Eighteen bioactive constituents including three phenylethanoid glycosides derivatives, six phenolic acids, three flavonoids, four phenylpropanoids, one fatty acid and one terpenoid were identified and quantified. Total contents of phenylethanoid glycosides, phenylpropanoids and flavonoids from raw samples were found much higher than those from ripe samples, while total content of phenolic acids showed a contrary tendency...
January 8, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28039154/new-application-of-ph-mediated-acid-stacking-technique-for-amphoteric-compounds-in-capillary-electrophoresis-example-assay-of-blood-glutathiones
#18
Yu Kong, Guifang Yang, Linghong Kong, Zhanwu Hou, Guifang Yang, Hua Li, Xiaoying Ji, Meili Gao
Both reduced and oxidized forms of glutathiones were firstly stacked and detected using pH-mediated acid stacking method, in which glutathiones were stacked as cations and separated as anions. Factors, such as injection time, sweeping time, buffer pH, concentration of sodium chloride in sample matrix, that influenced stacking and separation were systematically studied and optimized. Under the optimum condition, the enhancement factors of ~20 times for both reduced and oxidized forms of glutathiones could be easily obtained within 20 min with satisfied sensitivities (limit of detections were 0...
December 29, 2016: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28039153/lipophilicity-evaluation-of-some-n1-arylidene-thiosemicarbazones-and-1-3-4-thiadiazolines-with-antimicrobial-activity
#19
Ioana Ionuţ, Brînduşa Tiperciuc, Ovidiu Oniga
The lipophilic character of 20 previously reported compounds-derivatives of N(1)-arylidene-thiosemicarbazone (series A: ) and their corresponding 1,3,4-thiadiazolines (series B: )-has been determined by reversed-phase thin-layer chromatography, using i-propanol-water mixtures as eluents. Principal component analysis (PCA) allowed an objective estimation of the retention behavior of the tested compounds and also afforded to obtain a 2D scatterplot, described by the first two principal components, which had the effect of separating the compounds from each other most effectively...
December 29, 2016: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28013242/development-and-validation-of-a-gas-chromatography-method-for-quality-control-of-residual-solvents-in-azilsartan-bulk-drugs
#20
Jin Guan, Jie Min, Feng Yan, Wen-Ya Xu, Shuang Shi, Si-Lin Wang
A new gas chromatographic method for the simultaneous determination of six organic residual solvents (acetonitrile, tetrahydrofuran, ethanol, acetone, 2-propanol and ethyl acetate) in azilsartan bulk drug is described. The chromatographic determination was achieved on an OV-624 capillary column employing programmed temperature within 21 min. The validation was carried out according to International Conference on Harmonization validation guidelines. The method was shown to be specific (no interference in the blank solution), sensitive (Limit of detection can achieve 1...
December 23, 2016: Journal of Chromatographic Science
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