304 CLINICALCHEMISTRY,Vol.38, No.2, 1992 chain length on protein retention, resolution, and recovery implications for preparative HPLC. J Liq Chromatogr 1983;6:497-510. 4. Tarr GE, Crabb JW. Reverse-phase high-performance liquid chromatography of hydrophobic proteins and fragments thereof. Anal Biochem 1983;131:99-107. 5. Wu D, Walters ER. Stationary-phase ligand density effects in reversed-pha...

Apigenin is best known as an irreversible inhibitor of monoamine oxidase (MAO), an intracellular enzyme associated with the outer membrane of mitochondria. The purpose of this study is to establish a reliable and quick method for the assignment of Apigenin in Cosmos bipinnatus, Apium graveolens and Petroselinum crispum by high performance liquid chromatography with ultraviolet detection (HPLC-U...

solid phase extraction (spe) cartridge embedded with octadecyl c18 chain bounded to silica particles were used for the isolation and trace enrichment of pesticides from water samples collected from cotton, rice growing and municipal areas. the eluents were analyzed with high performance liquid chromatography (hplc) using methanol (100%) as mobiles phase at different uv-visible wavelengths. ddt ...

The measurement of glycosylated haemoglobin in blood is vital for monitoring metabolic control in diabetics [1-3]. The development of many different methods of measurement (based on cation-exchange chromatography, electrophoresis, high performance liquid chromatography [HPLC], affinity chromatography, radio and colorimetric immuno techniques) proves the importance of this assay [4]. Since the f...

Cyclocarya paliurus is an edible and medicinal plant containing various bioactive components with significant health benefits. A combinative method using high-performance liquid chromatography (HPLC) fingerprint and quantitative analysis was developed and successfully applied for characterization and quality evaluation of C. paliurus leaves collected from 18 geographical locations of China. For...

To examine the composition of lanostanoids in Ganoderma lucidum, we have developed a liquid chromatography-mass spectrometry (LC-MS) method by using the ganoderic acids isolated in our laboratory as reference standards. The identity of 14 peaks in the high performance liquid chromatogram (HPLC) of G. lucidum has been confirmed. By using the HPLC retention times of these ganoderic acids and thei...

The use of accelerated temperature stability studies using the Arrhenius relationship is routine for estimating the stability of a drug at room temperature. Therefore, the acceleration method is used to determine the expiration date of dexamethasone aqueous formulation manufactured in Iran. A high-performance liquid chromatography (HPLC) method utilizing ultraviolet (UV) detection for dexa...

A high speed high performance liquid chromatography (HPLC) method for the quantification of putrescine, spermidine, and spermine in biological samples is described. The dansylation is followed by a sample cleanup. The isocratic HPLC-analysis with acetonitrile:H(2)O (72:28 volume/volume) on 10 centimeter long, 3 micrometer octadecyl silica columns (3 millimeter inner diameter) takes only 4.5 min...