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Sensitivity high-performance liquid chromatography

Franco, C. M., Fente, C. A., Vazquez, B., Cepeda, A., Lallaoui, L., Prognon, P., and Mahuzier, G., Simple and sensitive high-performance liquid chromatography-fluorescence method for the determination of citrinin. Application to the analysis of fungal cultures and cheese extracts, /. Chromatogr. A, 723, 69, 1996. [Pg.194]

Bemert JT, McGuffey JE, Morrison MA, Pirkle JL (2000) Comparison of serum and salivary cotinine measurements by a sensitive high-performance liquid chromatography-tandem mass... [Pg.302]

K. Mori and K. Imai, Sensitive high-performance liquid chromatography system with fluorometric detection of three urinary catecholamines in the same range. Anal. Biochem., 146,283-286 (1985). [Pg.123]

Kunitani, M.G. Johnson, D.A. Upton, R.A. Riegelman, S. Convenient and sensitive high-performance liquid chromatography assay for cimetidine in plasma or urine. J.Chromatogr., 1981, 224, 156-161 [plasma urine non-interfering acebutolol, caffeine, ketoprofen, naproxen, theophylline pharmacokinetics LOQ 100 ng/mL]... [Pg.346]

Aravind, M.K. Prescilla, R. Ofenstein, J.P. A rapid and sensitive high-performance liquid chromatography assay for rofecoxib in human serum, J.Chromatogr.Sci., 2002, 40, 26-28. [Pg.562]

Watada, A. and Tran, T., A sensitive high-performance liquid chromatography method for analyzing riboflavin in fresh fruits and vegetables, J. Liq. Chromatogr., 8(9), 1651-1662, 1985. [Pg.426]

For selective estimation of phenols pollution of environment such chromatographic methods as gas chromatography with flame-ionization detector (ISO method 8165) and high performance liquid chromatography with UV-detector (EPA method 625) is recommended. For determination of phenol, cresols, chlorophenols in environmental samples application of HPLC with amperometric detector is perspective. Phenols and chlorophenols can be easy oxidized and determined with high sensitivity on carbon-glass electrode. [Pg.129]

Residue analytical methods for neonicotinoids in crops, soil and water samples have been developed. The basic principle of these methods consists of the following steps extraction of the crop and/or soil samples with acetone or the other organic solvent, cleanup by liquid-liquid partition or column chromatography, and quantitative analysis by high-performance liquid chromatography with ultraviolet detection (HPLC/UV). Simple column cleanup procedures are used to improve the accuracy and sensitivity of these methods. [Pg.1128]

Milbemectin consists of two active ingredients, M.A3 and M.A4. Milbemectin is extracted from plant materials and soils with methanol-water (7 3, v/v). After centrifugation, the extracts obtained are diluted to volume with the extraction solvent in a volumetric flask. Aliquots of the extracts are transferred on to a previously conditioned Cl8 solid-phase extraction (SPE) column. Milbemectin is eluted with methanol after washing the column with aqueous methanol. The eluate is evaporated to dryness and the residual milbemectin is converted to fluorescent anhydride derivatives after treatment with trifluoroacetic anhydride in 0.5 M triethylamine in benzene solution. The anhydride derivatives of M.A3 and M.A4 possess fluorescent sensitivity. The derivatized samples are dissolved in methanol and injected into a high-performance liquid chromatography (HPLC) system equipped with a fluorescence detector for quantitative determination. [Pg.1332]

Brinkman, U. A. Th., de Jong, G. J., and Gooijer, C., Use of luminescence techniques for sensitive and selective determinations in HPLC (high-performance liquid chromatography), Pure Appl. Chem., 59, 625, 1987. [Pg.54]

Other kinds of bloassays have been used to detect the presence of specific allelochemical effects (8), effects on N2 fIxatlon (9), the presence of volatile compounds (10) and of Inhibitory substances produced by marine microalgae (11). Putnam and Duke (12) have summarized the extraction techniques and bioassay methods used In allelopathy research. Recent developments In high performance liquid chromatography (HPLC) separation of allelochemlcals from plant extracts dictates the need for bloassays with sensitivity to low concentrations of compounds contained In small volumes of eluent. Einhellig at al. (13) described a bloassay using Lemna minor L. growing In tissue culture cluster dish wells that maximizes sensitivity and minimizes sample requirements. [Pg.198]

Hieda, Y., Kashimura, S., Hara, K., and Kageura, M., Highly sensitive and rapid determination of theophylline, theobromine and caffeine in human plasma and urine by high performance liquid chromatography frit fast atom bombardment spectrometry, J. Chromatogr., 667,241,1995... [Pg.43]

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