scholarly journals Affinity Liquid Chromatography Method for the Quantification of Immunoglobulin G in Bovine Colostrum Powders

2006 ◽  
Vol 89 (5) ◽  
pp. 1249-1256 ◽  
Author(s):  
David E J Copestake ◽  
Harvey E Indyk ◽  
Don E Otter
Keyword(s):  
Liquid Chromatography ◽  
Immunoglobulin G ◽  
Reversed Phase ◽  
Chromatography Method ◽  
Relative Standard ◽  
Liquid Chromatography Method ◽  
And Performance ◽  
Bovine Immunoglobulin ◽  
Reversed Phase Lc

Abstract An affinity liquid chromatography (LC) method for the determination of bovine immunoglobulin G (IgG), using protein G coupled to an agarose support, was modified to permit the quantification of IgG in colostrum-based powders. Sample preparation included pH adjustment to 4.6 to precipitate casein and denatured whey protein. The method was applied to a range of colostrum powders and was compared with the alternative independent methods of surface plasmon resonance immunoassay, radial immunodiffusion, and reversed-phase LC. The method was rapid, and performance parameters included a working range of 10-150 μg IgG and precision relative standard deviation values of <10%.

Reversed-phase high performance liquid chromatography method for the determination of paraquat in whole blood

2014 ◽  
Vol 6 (16) ◽  
pp. 6560-6564 ◽  
Author(s):  
Wuxiang Zhang ◽  
Yicong Su ◽  
Jiangu Shi ◽  
Maosheng Zhang ◽  
Bide Wu ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Whole Blood ◽  
High Performance ◽  
Reversed Phase ◽  
Chromatography Method ◽  
Liquid Chromatography Method

In this paper, a high performance liquid chromatography technique is established for quantification of paraquat in blood.

scholarly journals Simple and Rapid Liquid Chromatography Method for Determination of Rifabutin in Plasma

2013 ◽  
Vol 9 (2) ◽  
pp. 26-29 ◽  
Author(s):  
AK Hemanth Kumar ◽  
V Sudha ◽  
Geetha Ramachandran
Keyword(s):  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Pharmacokinetic Studies ◽  
Chromatography Method ◽  
Liquid Chromatographic Method ◽  
Relative Standard ◽  
Liquid Chromatography Method ◽  
Liquid Chromatographic

A high performance liquid chromatographic method for determination of rifabutin in human plasma was  developed. The method involved deproteinisation of the sample with acetonitrile and analysis of the  supernatant using a reversed-phase C18 column (250mm) and UV detection at a wavelength of 265nm.  The assay was specific for rifabutin and linear from 0.025 to 10.0μg/ml. The relative standard deviation  of intra- and inter-day assays was lower than 10%. The method was able to remove interfering materials  in plasma, yielding an average recovery of rifabutin from plasma of 101%. Due to its simplicity, the assay  can be used for pharmacokinetic studies of rifabutin. SAARC Journal of Tuberculosis, Lung Diseases & HIV/AIDS; 2012; IX(2) 26-29 DOI: http://dx.doi.org/10.3126/saarctb.v9i2.7975

scholarly journals Determination of lipophilicity for antitumor acridinone derivatives supported by gradient high-performance liquid chromatography method

2012 ◽  
Vol 10 (1) ◽  
pp. 216-223 ◽  
Author(s):  
Marcin Koba ◽  
Mariusz Belka ◽  
Tomasz Ciesielski ◽  
Tomasz Bączek
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Retention Factor ◽  
Reversed Phase ◽  
Log P ◽  
Chromatography Method ◽  
Factor Log ◽  
Liquid Chromatography Method

AbstractThe lipophilicity values of selected acridinone (imidazoacridinone and triazoloacridinone) derivatives were measured by gradient reversed-phase high-performance liquid chromatography (RP-HPLC) using a C18 stationary phase with a water/acetonitrile mixture as a mobile phase. The retention times obtained served as input data and appropriate log kw values (i.e., the retention factor log kw extrapolated to 0% organic modifier) as an alternative to log P were calculated using the DryLab program. The relationships between the lipophilicity (log kw) and the chemical structure of the studied compounds, as well as correlation between experimentally determined lipophilicities (log kw) and log P data calculated using some commonly available software, are discussed.

scholarly journals Simultaneous determination of seven glucocorticoids in cosmetics by liquid chromatography tandem mass spectrometry

2020 ◽  
Vol 3 (2) ◽  
pp. 115-124
Author(s):  
Dong Bui Quang ◽  
Phuong Vu Thi ◽  
Van Anh Tran Thi ◽  
Son Tran Cao ◽  
◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Tandem Mass Spectrometry ◽  
Simultaneous Determination ◽  
Reversed Phase ◽  
Fluocinolone Acetonide ◽  
Tandem Mass ◽  
Chromatography Method ◽  
Relative Standard

A rapid high-performance liquid chromatography method with electrospray ionization and tandem mass spectrometry detection (LC-ESI-MS/MS) was developed and validated for the simultaneous determination of 7 glucocorticoids (GC) including hydrocortisone acetate (HCA), cortisone acetate (COA), prednisone (PDS), prednisolone (PDL), methyl prednisolone (MPL), dexamethasone (DEX) and fluocinolone acetonide (FLA), which may be illegally blended in transdermal cosmetics. Sample preparation step consists of the extraction with ethyl acetate followed by centrifugation and filtration. The extract was dried, diluted and cleaned using C18 SPE column. The compounds were separated by reversed-phase chromatography with mobile phase containing 0.1% formic acid in water and acetonitrile in gradient condition. The method was validated at the validation level from 0.12 to 6.0 µg/g. The LODs for PDS, PDL and FLA were 0.3 µg/g and for the others were 0.03 µg/g, and LOQs were 0.6 and 0.12 µg/g, respectively. The reproducibility was satisfied with the relative standard deviation below 23% and the recoveries were in the range of 74.3-106.7% meeting AOAC requirements. The studied glucocorticoids were detected in about 20% of tested samples collected in Hanoi with the level contents in the range from 0.18 to 16.2 µg/g.

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