a new method for analysis of benzene, toluene, and xylene (btx) using high performance liquid chromatography-uv detection (hplc-uv) is described and compared to the gas chromatography (gc) method. a charcoal adsorption tube connected to a small pump was used to obtain samples from an atmosphere chamber standard. samples were extracted with methanol and analyzed by hplc-uv. chromatography was is...

recovery, a 10.72 0.49 84.3 6.Orcutt, J.J.,Kozak,P.P.,Gillman, S.A., and Cummins, L. H., Microscale method for theophylline in body fluids by reversed-phase high pressure liquid chromatography. Clin. Chem. 23,559-601 (1977). 7. Van den Bemd, A. A., Van Gorp, M. J. L. M.,and Verhoff, M. C. C., Bepaling van theophylline inserum met behulp van HPLC. Pharm. Weekbl. 113, 424-428 (1978). 8. Tang, D. ...

Replacing pressure-driven flow with electroosmotic flow in chromatography with packed capillary columns results in a new and powerful analytical technique, combining the advantages of high-performance liquid chromatography (HPLC) and capillary electrophoresis (CE): capillary electrochromatography (CEC). In essence, it involves packing CE capillaries with HPLC stationary phases and applying a vo...

Introduction: Polyalthia longifolia Thwaites (PL) is an ornamentally important flowering tree with immense potential. Identification of phytochemical constituents from plant extracts is need of hour in developing countries like India. These elucidated constituents may play a pivotal role in providing remedies to plethora of diseases whether major or minor. Proper application of analytical techn...

Abbreviations: ACN: Acetonitrile; AvBD: Avian Beta-Defensin; CAM: Carbamidomethylation; 1,5 DAN: 1,5 Diaminonaphthalene; DHB: 2,5 Dihydroxybenzoicacid; DTT: Dithiothreitol; FITC: Fluorescein Isothiocyanate; IAA: Iodoacetamide; ISD: In Source Decay; MALDI-MS: Matrix-Assisted Laser Desorption Ionization Mass Spectrometry; m/z: Mass/Charge; PI: Propidiumiodide; RP-HPLC: Reverse Phase-High Pressure...

Hyphenating High Temperature High Performance Liquid Chromatography (HT-HPLC) with High Temperature Size Exclusion Chromatography (HT-SEC) (High Temperature Two Dimensional Liquid Chromatography (HT-HPLC x HT-SEC or HT 2D-LC)) leads to an isocratic elution in the second dimension, which in turn enables to use IR detector (quantitative detection) for monitoring the eluting polymers. Experimental...

Earlier studies were focused on only a few of the 23 amino acids of the human body. Advanced laboratory techniques, such as high-pressure liquid chromatography (HPLC), have been developed to assess all amino acids in blood and CSF simultaneously. Multivariate statistical analyze strategies have been used to reveal possible relationships between amino acidand monoamine metabolites levels and kin...

The aim of this study was to compare system efficiency and analysis duration regarding the solvent consumption and system maintenance in high-pressure liquid chromatography (HPLC) and ultra high-pressure liquid chromatography (UHPLC). In a case-control study, standard solutions of 7 benzodiazepines (BZs) and 73 biological samples such as urine, tissue, stomach content, and bile that screened po...