Analytical Chemistry Insights

Determination of Chlorophenoxy Acid Methyl Esters and Other Chlorinated Herbicides by GC High-resolution QTOFMS and Soft lonization (Published on 09 Feb 2015)

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A Study of Method Development, Validation, and Forced Degradation for Simultaneous Quantification of Paracetamol and Ibuprofen in Pharmaceutical Dosage Form by RP-HPLC Method (Published on 18 Nov 2014)

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A Continuous Flow System for the Measurement of Ambient Nitrogen Oxides [NO + NO2] Using Rhodamine B Hydrazide as a Chemosensor (Published on 17 Aug 2014)

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Preliminary Development of a Fiber Optic Sensor for Measuring Bilirubin (Published on 01 Jul 2014)

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Corrigendum to “Utility of Experimental Design in Pre-Column Derivatization for the Analysis of Tobramycin by HPLC—Fluorescence Detection: Application to Ophthalmic Solution and Human Plasma” (Published on 11 Jun 2014)

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Determination of Xanthine in the Presence of Hypoxanthine by Adsorptive Stripping Voltammetry at the Mercury Film Electrode (Published on 09 Jun 2014)

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Kinetic Study of the Alkaline Degradation of Oseltamivir Phosphate and Valacyclovir Hydrochloride using Validated Stability Indicating HPLC (Published on 27 May 2014)

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Spectrophotometric and Spectrofluorimetric Studies on Azilsartan Medoxomil and Chlorthalidone to Be Utilized in Their Determination in Pharmaceuticals (Published on 07 May 2014)

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A UPLC–MS Method for the Determination of Ofloxacin Concentrations in Aqueous Humor (Published on 05 May 2014)

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Application of Nanofiber-packed SPE for Determination of Urinary 1-Hydroxypyrene Level Using HPLC (Published on 22 Apr 2014)

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Buprenorphine and Norbuprenorphine Determination in Mice Plasma and Brain by Gas Chromatography–Mass Spectrometry (Published on 10 Mar 2014)

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Synthesis and Characterization of Maillard Reaction Products of Salbutamol and Terbutaline with Lactose and Development and Validation of an LC Method for the Determination of Salbutamol and Terbutaline in the Presence of These Impurities (Published on 02 Mar 2014)

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Simultaneous Determination of Amlodipine Besylate and Atorvastatin Calcium in Binary Mixture by Spectrofluorimetry and HPLC Coupled with Fluorescence Detection (Published on 04 Nov 2013)

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Development and Validation of RP-LC Method for the Determination of Cinnarizine/Piracetam and Cinnarizine/Heptaminol Acefyllinate in Presence of Cinnarizine Reported Degradation Products (Published on 07 Oct 2013)

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The Evaluation of Two Commercially Available, Portable Raman Systems (Published on 10 Sep 2013)

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RP-LC and TLC Densitometric Determination of Paracetamol and Pamabrom in Presence of Hazardous Impurity of Paracetamol and Application to Pharmaceuticals (Published on 05 Sep 2013)

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Development of Methods for the Determination of pKa Values (Published on 08 Aug 2013)

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Biochemical Characteristics of Organic Matter in a Guano Concretion of Late Miocene or Pliocene Age from Manchester Parish in Jamaica (Published on 18 Jun 2013)

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Evidence for the Presence of 1,3-Dimethylamylamine (1,3-DMAA) in Geranium Plant Materials (Published on 06 Jun 2013)

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Determination of the Antiretroviral Drug Acyclovir in Diluted Alkaline Electrolyte by Adsorptive Stripping Voltammetry at the Mercury Film Electrode (Published on 20 May 2013)

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Utility of Experimental Design in Pre-Column Derivatization for the Analysis of Tobramycin by HPLC—Fluorescence Detection: Application to Ophthalmic Solution and Human Plasma (Published on 16 Apr 2013)

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A Rapid Stability-Indicating RP-HPLC Method for the Determination of Betaxolol Hydrochloride in Pharmaceutical Tablets (Published on 11 Mar 2013)

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Evaluation of Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry for Second-Generation Lignin Analysis (Published on 13 Dec 2012)

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Analysis and Confirmation of 1,3-DMAA and 1,4-DMAA in Geranium Plants Using High Performance Liquid Chromatography with Tandem Mass Spectrometry at ng/g Concentrations (Published on 08 Nov 2012)

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Identification and Quantification of Dimethylamylamine in Geranium by Liquid Chromatography Tandem Mass Spectrometry (Published on 06 Aug 2012)

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Simultaneous Determination of Sitagliptin and Metformin in Pharmaceutical Preparations by Capillary Zone Electrophoresis and its Application to Human Plasma Analysis (Published on 30 Jul 2012)

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A Calculation Model for Serum Ionized Calcium Based on an Equilibrium Equation for Complexation (Published on 04 Jul 2012)

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Two Chromatographic Methods for the Determination of Some Antimigraine Drugs (Published on 14 May 2012)

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Holistic Control of Herbal Teas and Tinctures Based on Sage (Salvia officinalis L.) for Compounds with Beneficial and Adverse Effects using NMR Spectroscopy (Published on 21 Mar 2012)

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Development and Validation of Spectrophotometric, Atomic Absorption and Kinetic Methods for Determination of Moxifloxacin Hydrochloride (Published on 07 Nov 2011)

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A Simple and Sensitive Assay for Measuring Very Small Volumes of Microprinted Solutions (Published on 31 Aug 2011)

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Simultaneous Determination of Amlodipine and Valsartan (Published on 28 Aug 2011)

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Conductimetric Biosensor for the Detection of Uric Acid by Immobilization Uricase on Nata de Coco Membrane—Pt Electrode (Published on 03 Jul 2011)

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Erratum for “Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric method” (Published on 06 Jun 2011)

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New Spectrophotometric Method for Determining Nitrogen Dioxide in Air Using 2,2-azino-bis(3-ethyl benzothiazoline)- 6-Sulfonic Acid-Diammonium Salt and Passive Sampling (Published on 29 May 2011)

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The Effect of Varying Short-Chain Alkyl Substitution on the Molar Absorptivity and Quantum Yield of Cyanine Dyes (Published on 23 Mar 2011)

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Low Level Determinations of Methyl Methanesulfonate and Ethyl Methanesulfonate Impurities in Emtricitabine Active Pharmaceutical Ingredient by LC/MS/MS Using Electrospray Ionization (Published on 10 Mar 2011)

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Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric method (Published on 01 Mar 2011)

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A Validated Reverse Phase HPLC Method for the Determination of Disodium EDTA in Meropenem Drug Substance with UV-Detection using Precolumn Derivatization Technique (Published on 23 Feb 2011)

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Floatation-spectrophotometric Determination of Thorium, Using complex Formation with Eriochrome Cyanine R (Published on 24 Jan 2011)

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Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric Method (Published on 20 Dec 2010)

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A Validated Stability-indicating Reverse Phase HPLC Assay Method for the Determination of Memantine Hydrochloride Drug Substance with UV-Detection Using Precolumn Derivatization Technique (Published on 20 Jul 2010)

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Cell-Free Expression of Protein Kinase A for Rapid Activity Assays (Published on 19 May 2010)

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A Modified Method for Determination of Lumefantrine in Human Plasma by HPLC-UV and Combination of Protein Precipitation and Solid-Phase Extraction: Application to a Pharmacokinetic Study (Published on 29 Mar 2010)

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Liquid Chromatography with Post-Column Reagent Addition of Ammonia in Methanol Coupled to Negative Ion Electrospray Ionization Tandem Mass Spectrometry for Determination of Phenoxyacid Herbicides and their Degradation Products in Surface Water (Published on 03 Feb 2010)

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Using a Matlab Implemented Algorithm for UV-vis Spectral Resolution for pKa Determination and Multicomponent Analysis (Published on 14 Dec 2009)

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Quantitative Mass spectrometric Analysis of Ropivacaine and Bupivacaine in Authentic, Pharmaceutical and Spiked Human Plasma without Chromatographic Separation (Published on 28 May 2009)

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Micelle Enhanced Fluorimetric and Thin Layer Chromatography Densitometric Methods for the Determination of (±) Citalopram and its S – Enantiomer Escitalopram (Published on 07 Apr 2009)

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New Spectrofluorimetric Method with Enhanced Sensitivity for Determination of Paroxetine in Dosage Forms and Plasma (Published on 18 Nov 2008)

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Use of Fourier Transform Infrared (FTIR) Spectroscopy to Study Cadmium-Induced Changes in Padina Tetrastromatica (Hauck) (Published on 15 Oct 2008)

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Palm-Based Standard Reference Materials for Iodine Value and Slip Melting Point (Published on 22 Sep 2008)

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Comparison of Gas Chromatography-Mass Spectrometry and Gas Chromatography-Tandem Mass Spectrometry with Electron Ionization and Negative-Ion Chemical Ionization for Analyses of Pesticides at Trace Levels in Atmospheric Samples (Published on 09 Sep 2008)

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Microalbuminuria Measured by three Different Methods, Blood Pressure and Cardiovascular Risk Factors in Elderly Swedish Males (Published on 02 Sep 2008)

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A Simple and Selective Spectrophotometric Method for the Determination of Trace Gold in Real, Environmental, Biological, Geological and Soil Samples Using Bis (Salicylaldehyde) Orthophenylenediamine (Published on 29 Aug 2008)

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Development and Validation of a HPLC Method to Determine Griseofulvin in Rat Plasma: Application to Pharmacokinetic Studies (Published on 27 Aug 2008)

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Micellar Electrokinetic Chromatographic Study of the Separation of an Aromatase Inhibitor and a Tryciclic Antidepressant in the Breast Cancer Treatment (Published on 13 Aug 2008)

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Uncertainty Analysis of Drug Concentration in Pharmaceutical Mixtures (Published on 03 Jun 2008)

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High-Performance Liquid Chromatographic Method for Determination of Phenytoin in Rabbits Receiving Sildenafil (Published on 18 Apr 2008)

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Understanding Structural Features of Microbial Lipases - An Overview (Published on 27 Mar 2008)

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Determination of Key Intermediates in Cholesterol and Bile Acid Biosynthesis by Stable Isotope Dilution Mass Spectrometry (Published on 25 Mar 2008)

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Optimized and Validated Spectrophotometric Methods for the Determination of Enalapril Maleate in Commercial Dosage Forms (Published on 01 Mar 2008)

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Detecting the Site of Phosphorylation in Phosphopeptides Without Loss of Phosphate Group Using MALDI TOF Mass Spectrometry (Published on 26 Feb 2008)

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Solid-Phase Extraction and Reverse-Phase HPLC: Application to Study the Urinary Excretion Pattern of Benzophenone-3 and its Metabolite 2,4-Dihydroxybenzophenone in Human Urine (Published on 31 Jan 2008)

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Role of 99mTc-(V)DMSA in Detecting Tumor Cell Proliferation (Published on 13 Dec 2007)

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Solid Phase Extraction for Monitoring of Occupational Exposure to Cr (III) (Published on 11 Dec 2007)

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Hazard Identification on a Single Cell Level Using a Laser Beam (Published on 06 Dec 2007)

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Identification of Cysteine Proteases and Screening of Cysteine Protease Inhibitors in Biological Samples by a Two-Dimensional Gel System of Zymography and Reverse Zymography (Published on 18 Nov 2007)

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A Practical Approach to Red Blood Cell Folate Analysis (Published on 14 Nov 2007)

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NS-187 (INNO-406), a Bcr-Abl/Lyn Dual Tyrosine Kinase Inhibitor (Published on 14 Nov 2007)

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UV-Vis Spectrophotometrical and Analytical Methodology for the Determination of Singlet Oxygen in New Antibacterials Drugs (Published on 11 Nov 2007)

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Possible Impact of Salivary Influence on Cytokine Analysis in Exhaled Breath Condensate (Published on 12 Oct 2007)

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Enantioselective Gas Chromatographic Separation of Racemic N-alkylated Barbiturates: Application of C11-Chirasil-Dex as Chiral Stationary Phase in GC (Published on 18 Sep 2007)

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Vibratory Reaction Unit for the Rapid Analysis of Proteins and Glycochains (Published on 17 Sep 2007)

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Determination of the Labile Iron Pool of Human Lymphocytes using the Fluorescent Probe, CP655 (Published on 17 Sep 2007)

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Unexpected Different Binding of Mistletoe Lectins from Plant Extracts to Immobilized Lactose and N-acetylgalactosamine (Published on 17 Sep 2007)

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Biomedical and Forensic Applications of Combined Catalytic Hydrogenation-Stable Isotope Ratio Analysis (Published on 06 Sep 2007)

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Identification and Quantitation of Asparagine and Citrulline Using High-Performance Liquid Chromatography (HPLC) (Published on 28 Mar 2007)

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Canine Plasminogen: Spectral Responses to Changes in 6-Aminohexanoate and Temperature (Published on 22 Mar 2007)

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The Use of Ion Chromatography for the Determination of Clean-In-Place-200 (CIP-200) Detergent Traces (Published on 27 Feb 2007)

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The Influence of Free 3-Nitrotyrosine and Saliva on the Quantitative Analysis of Protein-Bound 3-Nitrotyrosine in Sputum (Published on 14 Feb 2007)

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Novel Plasmid Transformation Method Mediated by Chrysotile, Sliding Friction, and Elastic Body Exposure (Published on 14 Feb 2007)

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Direct Enantiomeric Resolution of Betaxolol with Application to Analysis of Pharmaceutical Products (Published on 06 Feb 2007)

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