Journal of Chromatography & Separation Techniques最新文献_第4页

Method Validation and Application of Liquid Chromatography- Mass Spectrometry/Mass Spectrometry for Determination of Neonicotinoid Pesticide Residues in Tomato 液相色谱-质谱/质谱法测定番茄中新烟碱类农药残留量的方法验证及应用

Journal of Chromatography & Separation Techniques Pub Date : 2018-04-04 DOI: 10.4172/2157-7064.1000401

A. Suganthi, K. Bhuvaneswari

引用次数: 3

GC-MS Determination of the Isotope Distribution of Nickel GC-MS法测定镍的同位素分布

Journal of Chromatography & Separation Techniques Pub Date : 2018-02-28 DOI: 10.4172/2157-7064.1000397

V. Povarov, Sokolov Ob, C. Ma

引用次数: 0

Development of Analytical Method for Separation and Quantification of Cysteine Hydrochloride Monohydrate, Followed by Validation with Total Error Concept by Using Ultra Performance Liquid Chromatography with Pre-Column Derivatization 建立一水合物盐酸半胱氨酸的分离定量分析方法及柱前衍生超高效液相色谱全误差概念验证

Journal of Chromatography & Separation Techniques Pub Date : 2018-01-01 DOI: 10.4172/2157-7064.1000406

Aasodi Rr, Murugan, P. Kumari, Shree

{"title":"Development of Analytical Method for Separation and Quantification of Cysteine Hydrochloride Monohydrate, Followed by Validation with Total Error Concept by Using Ultra Performance Liquid Chromatography with Pre-Column Derivatization","authors":"Aasodi Rr, Murugan, P. Kumari, Shree","doi":"10.4172/2157-7064.1000406","DOIUrl":"https://doi.org/10.4172/2157-7064.1000406","url":null,"abstract":"The aim of the work was to develop a UPLC method to separate the Cysteine (Cys) from other amino acids (AA) for quantification and validation of this method using total error concept. Separation was performed using Waters Cortecs C18+ UPLC (2.1 × 100 mm)1.6 μm column using Waters Acquity UPLC with Tunable UV detector with gradient mobile phase contains 0.1% TFA as mobile phase A and Acetonitrile: Water (90:10) as mobile phase B with a flow rate of 0.3 mL /min at 265 nm. Sample was pre-derivatized using Fluorenylmethyloxycarbonyl chloride (FMOC-Cl). Validation using total error concept was successfully achieved for the determination of Cys in Amino acid formulations. The validated dosing range covered from 0.1 mg/mL to 0.5 mg/mL. Accuracy profile and risk profile was found to be good throughout the range. Pre-column derivatization method proposed in this study could be presented as a suitable method for separation and quantification of Cys in AA formulations. The method specificity, accuracy, precision, linearity and robustness were proved in validation, this method can be used for the separation and quantification of Cys in AA formulations.","PeriodicalId":15534,"journal":{"name":"Journal of Chromatography & Separation Techniques","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74817034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Microchip Liquid Chromatography: Future of Chromatography and Separation Techniques 微芯片液相色谱:色谱和分离技术的未来

Journal of Chromatography & Separation Techniques Pub Date : 2018-01-01 DOI: 10.4172/2157-7064.1000E144

R. Dubey

引用次数: 5

Comments on Uranium Content in Groundwater by Laser Fluorimetry: Method Validation and Dose Assessment 激光荧光法测定地下水中铀含量:方法验证及剂量评定

Journal of Chromatography & Separation Techniques Pub Date : 2018-01-01 DOI: 10.4172/2157-7064.1000413

Rathore Dps

引用次数: 0

Optimization of Subcritical Water Mediated Extraction of Apple Pomace Polyphenolics and their Antioxidant Activity 亚临界水提取苹果渣多酚的工艺优化及其抗氧化活性研究

Journal of Chromatography & Separation Techniques Pub Date : 2018-01-01 DOI: 10.4172/2157-7064.1000410

S. Ibrahim, Regina C D Santos, S. Bowra

{"title":"Optimization of Subcritical Water Mediated Extraction of Apple Pomace Polyphenolics and their Antioxidant Activity","authors":"S. Ibrahim, Regina C D Santos, S. Bowra","doi":"10.4172/2157-7064.1000410","DOIUrl":"https://doi.org/10.4172/2157-7064.1000410","url":null,"abstract":"Apple pomace, a by-product of apple juice and cider production is considered a potential source of pectin, citric acid and bioethanol and polyphenolic compounds. Polyphenolic compounds are known to possess antioxidant properties; hence, their isolation is a rout to add value to the apple pomace waste. The current research investigated the efficacy of subcritical water in the recovery of the polyphenolic antioxidant compounds from the apple pomace using a batch reactor system at 100-bar over a temperature range of 100-200°C. Experimental factors such as; nature of apple pomace, solid-to-solvent ratio, temperature, and residence time were studied and their impact on the yields of polyphenolic content and antioxidant activity were examined. Response surface methodology was used to design the experiment to study the potential interaction of operational parameter effects on overall recovery of polyphenolic compounds. Designed conditions demonstrated selectivity towards significant recovery of the polyphenolic compounds and antioxidant activity by Oxygen Radical Absorbance Capacity (ORAC). Optimized total Phenolic content and antioxidant activity of the wet apple pomace were achieved at 200°C for 1% solid-to-solvent ratio at a residence time of 30 minutes. Optimum Total phenolic content and ORAC activity of subcritical water extract were 49.86 mg GAE /g dw and 99285 μmol TE/g dw of apple pomace respectively. High Performance Liquid Chromatography (HPLC-DAD) in a reverse mode was applied to identify polyphenolic contents of the pomace extracts. Representative Hydrocinnamic acid and flavonoids were, Chlorogenic acid, Phloridzin, Procyanidin B2, Epicatechin and Quercetin glycosides. Water soluble antioxidant compound Protocatechuic aldehyde was identified for the first time only in the subcritical water extract and to date have not been identified in solvent extracts of cider apple pomace.","PeriodicalId":15534,"journal":{"name":"Journal of Chromatography & Separation Techniques","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77796851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Graphene-Based Materials Used in as Stationary Phase for Chromatography: A Mini Review 用于色谱固定相的石墨烯基材料综述

Journal of Chromatography & Separation Techniques Pub Date : 2018-01-01 DOI: 10.4172/2157-7064.1000399

L. Yang, T. GuoXiao, J. Yang, Z. Xu, M. Qin

引用次数: 4

Determination of Olanzapine in Five Different Pharmaceutical Formulations by LC-MS Method LC-MS法测定5种不同制剂中奥氮平的含量

Journal of Chromatography & Separation Techniques Pub Date : 2018-01-01 DOI: 10.4172/2157-7064.1000409

A. Mevlut, K. Yucel, Y. MehmetEmrah, S. Onur

引用次数: 1

Simultaneous Determination of Ammonium Ion, MDEA, Common Metal Cations and Dialkyl Amines in Amine Processing Solution by Ion Chromatography 离子色谱法同时测定胺处理液中的铵离子、MDEA、常见金属阳离子和二烷基胺

Journal of Chromatography & Separation Techniques Pub Date : 2018-01-01 DOI: 10.4172/2157-7064.1000416

Ravindra Singh, M. Khan, A. Yadav, A. Chopra, Kagdiyal

{"title":"Simultaneous Determination of Ammonium Ion, MDEA, Common Metal Cations and Dialkyl Amines in Amine Processing Solution by Ion Chromatography","authors":"Ravindra Singh, M. Khan, A. Yadav, A. Chopra, Kagdiyal","doi":"10.4172/2157-7064.1000416","DOIUrl":"https://doi.org/10.4172/2157-7064.1000416","url":null,"abstract":"In the present study a new method has been developed for the separation and estimation of common metal cations (Li+, Na+, K+), Methyl diethanolamine (MDEA) (and types of alkyl amines) and their degradation products including ammonium ion used in amine processing solution. The acid treating amines such as dimethyl amine (DMA), Diethyl amine (DEA), Dipropylamine (DPA), Diisopropyl amine (DPA) and Dibutyl amine (DBA) in amine processing solution have been separated by Ion Chromatography (IC) using conductivity detector in single column mode. Desired separation was achieved within 20 min using mixture of 3 mM CH3SO3H+CH3CN (90:10) as mobile phase on Dionex Ion Pac SCS1 column at temperature of 30°C. Calibration curve for all the cations (Li+, Na+, K+, NH4+) in the concentration range of 2.5-20 ppm and 3-100 ppm for dialkyl amine were plotted and it was observed that the correlation coefficient (R2) list in between 0.9980 and 1.0. Relative Standard Deviation (RSD) observed for all the abovementioned cations were in the range of 0.81-2.33%. Recovery of all the cations at different concentrations of amine processing matrix was in the range of 80-120%. The lower Limit of Detection (LOD) for Li+, Na+, K+, NH4+ was 0.5 ppm, and for MDEA and all above alkyl amines was 1.0 ppm. The operational simplicity of this method in terms of accuracy and precision can be a good alternative for the estimation of above ions in amine processing solution.","PeriodicalId":15534,"journal":{"name":"Journal of Chromatography & Separation Techniques","volume":"222 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74459949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

QuEChERS: The Dispersive Methodology Approach for Complex Matrices 队列:复杂矩阵的色散方法学方法

Journal of Chromatography & Separation Techniques Pub Date : 2018-01-01 DOI: 10.4172/2157-7064.1000398

M. Maggira, Samanidou

引用次数: 1