The February issue of Chromatography Techniques features a cover story on accelerator mass spectrometry, and other features on GC analysis in fracking locations, new USP methods, NIR spec analysis in tablet testing, and more!
Updates to the allowed limits of HPLC and GC parameters enable higher-speed analysis of USP...
Dual-column gas chromatography meets the needs of the environmental testing industry by...
Multiple gas chromatography methods are being deployed to monitor a suite of fracking-related...
Accelerator mass spectrometry (AMS) is an analytical technique for measuring isotope ratios with high selectivity, sensitivity and precision. Initially developed more than 75 years ago by Robert Cornog and Luis Alvarez at the Univ. of California, Berkeley, there are now more than 110 AMS systems in 28 countries around the world, mostly at government and university labs, but a few at private companies as well.
As illustrated by experimental results, imaging in high-magnification mode is faster and results in more spectral and spatial detail.
Near-infrared spectroscopy reduces the amount of time and work needed to test sustained-release tablets, and ensures nondestructive, reliable analysis.
DNA testing on hundreds of bottles of store-brand herbal supplements sold as treatments for everything from memory loss to prostate trouble found that four out of five contained none of the herbs on the label. Instead, they were packed with cheap fillers such as wheat, rice, beans or houseplants.
A potential avenue to quantum computing currently generating quite the buzz in the high-tech industry is valleytronics, in which information is coded based on the wavelike motion of electrons moving through certain 2-D semiconductors. Now, a promising new pathway to valleytronic technology has been uncovered.
Alzheimer's disease is difficult to spot in its early stages, has no effective treatment and no known cure. But, researchers are hopeful their work will make the most common form of dementia easier to diagnose and treat. Their research indicates that iron deficiency may play a significant part in the development of Alzheimer's.
The December issue of Chromatography Techniques details a mass spectrometry technique enables the detection of drugs and medical conditions from just a single drop of fluid, such as blood or urine, within minutes. Other articles include: size of future mass spec, choosing HPLC columns, soft ionization, separation of antibodies. There are also new products.
Because of the high cost of HPLC columns, there are numerous ways to find out which column(s) might best be of use for an intended but new separation. If some of the components are known, then the literature or manufacturers’ websites can be consulted. This might take some time, but the research of others can save both time and money in your own work.
Pre-formulated buffers for pH gradient have greatly simplified the development of ion exchange chromatography (IEX) of monoclonal antibodies (mAbs). Three features make this simplification possible.
Soft ionization remains a relatively underused technique for GCMS, despite its ability to provide improved confidence in the identification of a range of challenging analytes. But there is now a new approach that makes it possible to lower the energy of electron ionization to achieve soft ionization, without the disadvantages with which it has historically been associated.
Mass spectrometry (MS) is the workhorse of analytical chemistry. It performs the analysis of the sample, making MS equipment an essential part of the analytical instrumentation market. A recent shift in the laboratory landscape, however, is forcing a change in the size and functionality of mass spec equipment.
Researchers at Purdue Univ. have pioneered a separation technique that can be used in everything from homeland security and law enforcement to drug discovery and biomedical applications. The technique, called slug flow microextraction, makes it possible to quickly detect the presence of drugs or monitor certain medical conditions using only a single drop of blood or urine.
Phenomenex has extended its SecurityGuard family of products to include a cartridge-based system that protects any non-aqueous gel permeation chromatography (GPC) column. The cartridge system replaces traditional guard columns, offering a more convenient and cost-effective system for protecting expensive GPC columns from the damaging effects of contaminants and microparticulates.
Every LC lab has a cache of C18s, but every C18 is not created equal. Because the chemistry tends to be similar, the silica support that carries this ubiquitous octadecylsilane phase becomes vitally important.
JM Science offers a complete line of Shiseido HPLC Columns. CAPCELL PAK is an epoch-making HPLC column integrating the enhanced separation performance of silica-based, polymer-coated packing material. It provides columns of reversed phase partition mode, normal phase partition mode and ion exchange mode.
EMD Millipore has added three chromatography resins to its Chromabolt prepacked columns. These pre-validated chromatography columns come packed with either strong cation exchangers, weak cation exchangers or strong anion exchangers, freeing up end users’ time and resources by eliminating manual column packing and cleaning.
Innova Biosciences has launched InnovaGOLD, a range of ultra-high-quality gold nanoparticles that have demonstrated improved sensitivity, stability and reproducibility in immunoassays compared to other commercially available gold colloids.
Shimadzu Scientific Instruments has added to its integrated liquid chromatography systems line with the Prominence-i and Nexera-i. Combining enhanced functionality, an intuitive operating environment and full automation, the series provides excellent performance and a more efficient workflow for conventional to ultra-high-speed analysis.
Wyatt Technology’s DynaPro Plate Reader II can run automated high-throughput screening-dynamic light scattering analyses to characterize protein-protein interactions in standard microwell plates, under multiple conditions in a significantly reduced time frame, making DLS a viable option for stability-indicating parameter (SIP) screening.
Restek has developed a new certified reference material (CRM) of four PAHs—benz[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene, and chrysene—designed for greater convenience, longer shelf life and increased long-term accuracy.
Practichem has added to its Chromponents line with the BioD3, a compact LED-based UV and conductivity detector, and FluidSwitch, a line of biocompatible rotary valves. Chromponents is a series of modules designed for easy configuration.
Phenomenex has added Phenova Certified Reference Materials (CRMs), a line of ISO/IEC 17025- and ISO Guide 34-compliant standards for the calibration of analytical equipment and quantitation of analytical measurements for environmental testing.
Now, OEMs can give gas chromatography users the high analysis repeatability and low detection limits they demand, thanks to the FAS 16 mm FASPROP low flow proportional valve from Norgren. With a small orifice—just 0.002” (0.05 mm)—and compact design, the valve precisely controls low flow rates in the mL range (up to 174 psi/12 bar), enabling the use of most common carriers.
New Star Environmental’s Frog-4000 is a fully contained purge and trap GC system with analytical capabilities that are comparable to a commercial lab, with the advantage of its compact size.
GOW-MAC’s programmable, microprocessor-controlled gas chromatograph, the Series 8100, features a broad, flexible platform that allows for custom, application-specific system configurations for research, industrial, laboratory, academic and QA/QC environments.
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