Articles

Ultrafast screen for designer drugs in urine using high-throughput mass spectrometry

MS2-25-4-sIn this article we learn of a new definition for “bath salts”, and how modern mass spectrometry instrumentation can provide rapid and quantitation of these “designer” drugs.

Read more: Ultrafast screen for designer drugs in urine using high-throughput mass spectrometry

 

Tip-enhanced Raman mapping (TERM) of single-walled carbon nanotubes and graphene

Raman_25_3-F2-sSingle-walled carbon nanotubes and graphene are the subjects of great interest at present. The Tip-enhanced Raman mapping (TERM) technique is most useful for their study and can even find defects in a single sheet of graphene or a single nanotube with a spatial resolution of ~35 nm.

Read more: Tip-enhanced Raman mapping (TERM) of single-walled carbon nanotubes and graphene

   

Determination of trace element concentrations in ambient aerosols by synchrotron radiation-induced X-ray fluorescence spectrometry

X-ray_25_3-sBoth the size and chemical composition of airborne particles have an effect on human health. Whilst the effects of size have been much studied,  many of the toxic chemicals in particles are at very low concentration and have been less studied. Monitoring their composition and concentration over time helps to determine their source. Synchrotron radiation-induced XRF spectrometry proves to be a good tool for this purpose.

Read more: Determination of trace element concentrations in ambient aerosols by synchrotron radiation-induced X-ray fluorescence spectrometry

   

Determining spatial sodium distribution in fresh and aged bread using laser-induced breakdown spectroscopy

Atomic_25_3-F1-sMost of us are increasingly aware of the dangers of the modern diet and realise that salt intake should be kept low. It turns out that bread is a major contributor to our salt intake. However, without it, the bread is not particularly palatable. One trick is to distribute the salt unevenly throughout the bread, but the salt then needs to be encapsulated to prevent it dissolving. This article describes the use of laser-induced breakdown spectroscopy to monitor this distribution and help develop methods to reduce the salt content of bread whilst maintaining the taste.

Read more: Determining spatial sodium distribution in fresh and aged bread using laser-induced breakdown spectroscopy

   

Surface-enhanced Raman scattering (SERS) spectroscopy identifies fraudulent uses of fuels

SERS-25-2-sFuels and the taxes raised from their sale are a big business around the world. To control smuggling, counterfeiting, theft and product diversion, markers can be placed in the fuel. The use of a SERS active compounds as markers is described as well as the development of a portable instrument for detection of the markers in the field.

Read more: Surface-enhanced Raman scattering (SERS) spectroscopy identifies fraudulent uses of fuels

   

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