Analytical Techniques Used for Determination of Methylxanthines and their Analogues—Recent Advances

Caffeine (1, 3, 7-trimethylxanthine) in Foods: A Comprehensive Review on Consumption, Functionality, Safety, and Regulatory Matters

(2010) Melanie A. Heckman et al.   JOURNAL OF FOOD SCIENCE

Capillary electrophoresis with contactless conductivity detection for uric acid determination in biological fluids

(2009) Worapan Pormsila et al.   ANALYTICA CHIMICA ACTA

Improved rapid assay of plasma uric acid by short-end injection capillary zone electrophoresis

(2009) Salvatore Sotgia et al.   ANALYTICAL AND BIOANALYTICAL CHEMISTRY

Multiple screening of urolithic organic acids with copper nanoparticle-plated electrode: Potential assessment of urolithic risks

(2009) Chung-Wei Yang et al.   ANALYTICAL BIOCHEMISTRY

Simultaneous Electrochemical Monitoring of Metabolites Related to the Xanthine Oxidase Pathway Using a Grinded Carbon Electrode

(2009) Stanislav Hason et al.   ANALYTICAL CHEMISTRY

Highly Sensitive and Selective Uric Acid Biosensor Based on Direct Electron Transfer of Hemoglobin-encapsulated Chitosan-modified Glassy Carbon Electrode

(2009) Changzhi ZHAO et al.   ANALYTICAL SCIENCES

A Simplified Method to Determine Five Cytochrome P450 Probe Drugs by HPLC in a Single Run

(2009) Ying Liu et al.   BIOLOGICAL & PHARMACEUTICAL BULLETIN

Xanthine oxidase/laponite nanoparticles immobilized on glassy carbon electrode: Direct electron transfer and multielectrocatalysis

(2009) Dan Shan et al.   BIOSENSORS & BIOELECTRONICS

Increase of uric acid and purine compounds in biological fluids of multiple sclerosis patients

(2009) Angela M. Amorini et al.   CLINICAL BIOCHEMISTRY

Gold nanoparticle-enhanced capillary electrophoresis-chemiluminescence assay of trace uric acid

(2009) Shulin Zhao et al.   ELECTROPHORESIS

Rapid Determination of Phenolic Compounds and Alkaloids of Carob Flour by Improved Liquid Chromatography Tandem Mass Spectrometry

(2009) Nàdia Ortega et al.   JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

Fast HPLC–ECD analysis of ascorbic acid, dehydroascorbic acid and uric acid

(2009) Xingnan Li et al.   JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES

A sensitive and specific liquid chromatography–tandem mass spectrometry method for the determination of intracellular and extracellular uric acid

(2009) Kyung Mee Kim et al.   JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES

Ultraviolet and tandem mass spectrometry for simultaneous quantification of 21 pivotal metabolites in plasma from patients with diabetic nephropathy

(2009) Jian-Fei Xia et al.   JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES

Quantification of theobromine and caffeine in saliva, plasma and urine via liquid chromatography–tandem mass spectrometry: A single analytical protocol applicable to cocoa intervention studies

(2009) Adam S. Ptolemy et al.   JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES

Simultaneous quantitation of paracetamol, caffeine, pseudoephedrine, chlorpheniramine and cloperastine in human plasma by liquid chromatography–tandem mass spectrometry

(2009) Hao Li et al.   JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS

Development and validation of a rapid and efficient method for simultaneous determination of methylxanthines and their metabolites in urine using monolithic HPLC columns

(2009) Noha N. Atia et al.   JOURNAL OF SEPARATION SCIENCE

Fabrication of amperometric xanthine biosensors based on direct chemistry of xanthine oxidase

(2009) Yansheng Gao et al.   Materials Science & Engineering C-Materials for Biological Applications

Direct measurements of xanthine in 2000-fold diluted xanthinuric urine with a nanoporous carbon fiber sensor

(2008) Mehjabin Kathiwala et al.   ANALYST

Comparative study of robustness between micellar electrokinetic capillary chromatography and high-performance liquid chromatography using one-variable-at-a-time and a new multi-variable-at-a-time approach

(2008) Rade Injac et al.   ANALYTICA CHIMICA ACTA

Simultaneous voltammetric detection of ascorbic acid, dopamine and uric acid using a pyrolytic graphite electrode modified into dopamine solution

(2008) Robson P. da Silva et al.   ANALYTICA CHIMICA ACTA

Determination of uric acid in human urine and serum by capillary electrophoresis with chemiluminescence detection

(2008) Shulin Zhao et al.   ANALYTICAL BIOCHEMISTRY

Simultaneous Determination of Creatinine and Uric Acid in Human Urine by High-Performance Liquid Chromatography

(2008) Yuegang ZUO et al.   ANALYTICAL SCIENCES

Sensitive Determination of Dopamine and Uric Acid by the Use of a Glassy Carbon Electrode Modified with Poly(3-methylthiophene)/Gold Nanoparticle Composites

(2008) Xue HUANG et al.   ANALYTICAL SCIENCES

Immobilization of a trienzymatic system in a sol–gel matrix: A new fluorescent biosensor for xanthine

(2008) A. Salinas-Castillo et al.   BIOSENSORS & BIOELECTRONICS

Electrochemical determination of uric acid at ordered mesoporous carbon functionalized with ferrocenecarboxylic acid-modified electrode

(2008) Jean Chrysostome Ndamanisha et al.   BIOSENSORS & BIOELECTRONICS

Selective detection of uric acid in the presence of ascorbic acid at physiological pH by using a β-cyclodextrin modified copolymer of sulfanilic acid and N-acetylaniline

(2008) Shouguo Wu et al.   BIOSENSORS & BIOELECTRONICS

Electrochemical synthesis of polyaniline nano-networks on p-aminobenzene sulfonic acid functionalized glassy carbon electrode

(2008) Lei Zhang et al.   BIOSENSORS & BIOELECTRONICS

Simultaneous voltammetric determination of norepinephrine, ascorbic acid and uric acid on polycalconcarboxylic acid modified glassy carbon electrode

(2008) Ai-Lin Liu et al.   BIOSENSORS & BIOELECTRONICS

Development of a high analytical performance-xanthine biosensor based on layered double hydroxides modified-electrode and investigation of the inhibitory effect by allopurinol

(2008) Dan Shan et al.   BIOSENSORS & BIOELECTRONICS

Design of a new cartridge for selective solid phase extraction using molecularly imprinted polymers: Selective extraction of theophylline from human serum samples

(2008) Afshin Rajabi Khorrami et al.   BIOSENSORS & BIOELECTRONICS

A Polymer Film Modified Sensor for Voltammetric Determination of Uric Acid in the Presence of Ascorbic Acid and Its Application in Urine

(2008) Ailin Liu et al.   CHEMICAL & PHARMACEUTICAL BULLETIN

A Poly(3-acetylthiophene) Modified Glassy Carbon Electrode for Selective Voltammetric Measurement of Uric Acid in Urine Sample

(2008) Mehmet Aslanoglu et al.   CHEMICAL & PHARMACEUTICAL BULLETIN

A tandem mass spectrometry assay for the simultaneous determination of acetaminophen, caffeine, phenytoin, ranitidine, and theophylline in small volume pediatric plasma specimens

(2008) Yi Zhang et al.   CLINICA CHIMICA ACTA

Voltammetric determination of hypoxanthine based on the enhancement effect of mesoporous TiO2-modified electrode

(2008) Xiafeng Xie et al.   COLLOIDS AND SURFACES B-BIOINTERFACES

Simultaneous determination of tryptophan, uric acid and ascorbic acid at iron(III) doped zeolite modified carbon paste electrode

(2008) Ali Babaei et al.   COLLOIDS AND SURFACES B-BIOINTERFACES

Platinum Nanoparticles Decorated Multiwalled Carbon Nanotubes - Ionic Liquid Composite Film Coated Glassy Carbon Electrodes for Sensitive Determination of Theophylline

(2008) Liqin Liu et al.   ELECTROANALYSIS

Development and validation of an MEKC method for determination of nitrogen-containing drugs in pharmaceutical preparations

(2008) Francesca Buiarelli et al.   ELECTROPHORESIS

Coupling of solid-phase microextraction continuous bed (monolithic) capillaries with capillary zone electrophoresis for direct analysis of drugs in biological fluids

(2008) Reda Jarmalavičienė et al.   ELECTROPHORESIS

Rapid liquid chromatography–tandem mass spectrometry method for the determination of a broad mixture of pharmaceuticals in surface water

(2008) Justin M. Conley et al.   JOURNAL OF CHROMATOGRAPHY A

Surface modification of poly(dimethylsiloxane) microfluidic devices and its application in simultaneous analysis of uric acid and ascorbic acid in human urine

(2008) Ru-Ping Liang et al.   JOURNAL OF SEPARATION SCIENCE

Quantitative capillary electrophoresis and its application in analysis of alkaloids in tea, coffee, coca cola, and theophylline tablets

(2008) Mengjia Li et al.   JOURNAL OF SEPARATION SCIENCE

An RNA Aptamer-Based Electrochemical Biosensor for Detection of Theophylline in Serum

(2008) Elena E. Ferapontova et al.   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Medical Stone Management: 35 Years of Advances

(2008) Charles Y.C. Pak   JOURNAL OF UROLOGY

Sensitive and selective xanthine amperometric sensors based on calcium carbonate nanoparticles

(2008) Dan Shan et al.   SENSORS AND ACTUATORS B-CHEMICAL

Indirect voltammetric determination of caffeine content in coffee using 1,4-benzoquinone modified carbon paste electrode

(2008) M AKLILU et al.   TALANTA

Simultaneous voltammetric determination of paracetamol and caffeine in pharmaceutical formulations using a boron-doped diamond electrode

(2008) Bruna Cláudia Lourenção et al.   TALANTA

An inlaying ultra-thin carbon paste electrode modified with functional single-wall carbon nanotubes for simultaneous determination of three purine derivatives

(2007) Zhenhui Wang et al.   SENSORS AND ACTUATORS B-CHEMICAL