Chromatography Online
CONTINUE TO SITE >

OR WAIT 15 SECS

The Application Notebook-02-01-2010

The Application Notebook

Improved Reproducibility of MW Measurements of Polypeptoids Using an EcoSEC GPC System

February 01, 2010

Polymer

0

0

The EcoSEC GPC System and a set of TSK-GEL mixed-bed columns, both available from Tosoh Bioscience, were used successfully for obtaining high quality MWD data of a series of block poly-β-alkylalanoids with HFIP as the mobile phase in under 15 min.

Preparing for Pittcon 2010

February 01, 2010

From the Publisher

0

0

There is an old axiom, attributed to various individuals, that holds: "Luck favors the prepared." This can apply to nearly any endeavor or project in life, as generally speaking, the harder you work, the more likely it is that good things will happen.

Flexible Fused Silica Capillary: Impact of Aging on Strength

February 01, 2010

General

0

0

One of the most important attributes of flexible fused silica capillary tubing is its outstanding strength. When made properly with a protective abrasion resistant coating and handled appropriately this material has proven to maintain its strength remarkably well.

U.S. EPA Method 524.3 for Analysis of Volatile Organic Compounds (VOCs) in Finished Drinking Water

February 01, 2010

Environmental

0

0

The U.S. EPA Office of Groundwater and Drinking Water released Method 524.3, "Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry, Version 1.0," in the Federal Register on August 3rd, 2009 (1, 2).

Quantitative Characterization of Polymer Blends by Pyrolysis-Gas Chromatography-Time of Flight Mass Spectrometry (Pyr-GC-TOFMS)

February 01, 2010

Polymer

0

0

Pyrolysis GC?MS is a valuable tool for the material scientist. It is used principally for qualitative identification of polymers and their breakdown products. This application note displays how this technique can also be used for quantitative determination of polymer compositions by comparing peak area ratios of monomers and/or primary pyrolysis products.

Profiling of Essential Oil VOCs and SVOCs by GC–TMS

February 01, 2010

Industrial

0

0

Spice and fragrance essential oil raw materials frankincense (Boswellia carterii) from India and Somalia, sandalwood (Santalum album) from India and Indonesia, and corn mint (Mentha haplocalyx) from the United States were analyzed for on-site analytical profiling and confirmation of quality and purity of therapeutic grade essential oils from raw materials.

An Empirical Evaluation of HILIC and Monolithic Columns for SFC Applications

February 01, 2010

General

0

0

Separation of polar compounds by conventional reverse phase chromatography can be challenging due to their poor retention. Other HPLC approaches include normal phase chromatography (NPC) and its variation, hydrophilic interaction chromatography (HILIC).

Increased Efficiency and Resolution with Kinetex„ Core-Shell Technology

February 01, 2010

General

0

0

Over the past several years column manufacturers have been introducing columns packed with smaller particle sizes – sub-2 µm and 3 µm – to take advantage of the improvements that such small particle size columns offer.

Ionic Liquids by IC–MS

February 01, 2010

General

0

0

The characteristic composition of ionic liquids (an organic cation or anion and a counterion, in either organic or inorganic form) exhibits unique properties, such as extremely low vapor pressure, excellent thermal stability, electrical conductivity, high polarity, and miscibility with various types of solvents.

Determination of Sulfonamide Antibiotics in Bovine Liver Using Agilent SampliQ QuEChERS EN Kits by LC–MS-MS

February 01, 2010

Pharmaceutical

0

0

The procedure involves a rapid and efficient pretreatment with SampliQ QuEChERS kits. The homogenized liver sample was initially extracted in a buffered aqueous/1% acetic acid acetonitrile system with an extraction and partitioning step after the addition of salts.

GC–MS Analysis of Volatile Organic Compounds in Drinking Water: Productivity Solution for U.S. EPA Method 524.2

February 01, 2010

Environmental

0

0

The GC–MS analysis of volatile organics in drinking water according to United States Environmental Protection Agency (US EPA) Method 524.2 offers a number of analytical challenges, ranging from water handling to very low target compound concentrations.