Application Notes: Pharmaceuticals

We have previously shown the ability of a novel stationary phase to separate 55 amino acids without derivatization (LCGC 32(3), 211 [2014]).

A purified polyclonal antibody (IgG) is separated and fully characterized using the Viscotek SEC-MALS 20, allowing calculation of molecular weight and radius of gyration (Rg).

Chiral separations of multi-component natural product mixtures comprised of enantiomers, diastereomers, and unrelated molecules are often difficult to resolve in a single isocratic method.

This application describes a solid phase extraction (SPE) method for EPA method 8141B analytes, including organophosphorus compounds, and triazine herbicides in water.

Alprostadil (Prostaglandin E1) is a drug that has vasodilation properties and is used to treat erectile dysfunction and other medical conditions.

Hydrophilic interaction liquid chromatography (HILIC) is one of the fastest growing modes of separation, in which any polar chromatographic surface can be used.

Two species of spearmint oil (mentha spicata and mentha gracilis) are cultivated in the United States.

Pain management LC analyses can be difficult to optimize due to the limited selectivity of C18 and phenyl-hexyl phases.

Hydrophilic interaction chromatography (HILIC) provides an alternative approach for the separation of highly polar substances.

A novel method for drug antibody ratio determinations based on SEC-MALS in conjunction with UV absorption and differential refractive index detection.

QuEChERS is a quick-easy-cheap-effective-rugged-safe extraction method developed in 2003 for the extraction of pesticide residues in agricultural commodities (1,2).

This application note demonstrates how comprehensive 2D-LC can be used to resolve the complex mixture of hydrophilic phenols found in virgin olive oil and investigates differences in the phenol composition of several olive oils.

Selectivity is the most powerful tool to optimize separations in HPLC. This parameter is changed by using different bonded phases, including C18, polar embedded, phenyl bonded phases and perflorophenyl, or by changing the mobile phase. In this work, 4.6 ? 50 mm Poroshell 120 columns are used to quickly evaluate method development choices for the analysis of non-steroidal anti-inflammatory drugs (NSAIDS).

A new fused-core particle designed specifically for the separation of proteins and monoclonal antibodies with 3.4 ?m particle size and a thin 0.2 ?m porous shell demonstrates high resolution of the heavy and light chain fragments of IgG1.

Agilent Technologies

Wyatt Technology Corporation

Bruker Daltonics

Biotage GB Ltd

The unique surface chemistry of the Flare diamond core-shell column combines ionic and hydrophobic separation mechanisms to effectively retain a variety of chemical species in a single run.

High throughput analysis of amino acids has been a goal for both column and instrument manufacturers for many years.

Polyether antibiotics are commonly used for preventing coccidiosis and other infections in poultry and for improving feed efficiency for beef cattle and swine.

In this application we demonstrate the analysis of coffee and coffee products according to DIN methods. The performance of the analysis is shown for linearity, limit of detection (LOD), limit of quantification (LOQ), retention time, and area precision.

Gas chromatography coupled to high resolution time-of-flight mass spectrometry (GC–HRT) was used to identify halogenated organic compounds based on their mass defects in fish tissue extracts.

As the cost of helium increases and its availability decreases, an increasing number of Gas Chromatography (GC) professionals are considering switching to hydrogen gas for their carrier gas.

The ability to simultaneously collect quantitative and qualitative information from a DMPK analysis has the potential to significantly increase productivity in pharmaceutical drug discovery and development.

Heparin is a polydisperse, heterogeneous polysaccharide derived from animal tissue. Heparin has been used as an anticoagulant for over 60 years and one of the fundamental parameters for characterizing unfractionated heparin (UFH) is its molecular weight (MW) and MW distribution.

The use of UHPLC systems for small molecule analysis has gained widespread acceptance among researchers in recent years.

Fusel alcohols, a common byproduct of fermentation, in abnormal quantities or types can indicate alcoholic beverage adulteration.

US EPA method 529 is the procedure to determine explosives and related compounds in finished drinking water.

In mass spectrometry instrumentation, the sensitivity and resolution of the instrument is often limited by the detector.