Articles

Total reflection X-ray fluorescence technique for multi-elemental analysis of food

XRF-29-1-F1-sX-ray spectroscopy techniques have some advantages over other atomic spectroscopy techniques in the analysis of foods, for instance in not requiring significant sample preparation. Amongst these, TXRF has higher sensitivity and limits of detection in the ng range. The authors look at the analysis of a number of very different foods, including seafood, honey and vegetables.

Read more: Total reflection X-ray fluorescence technique for multi-elemental analysis of food

 

Investigation of paper collages by near infrared imaging techniques

NIR-29-1-F2-sWe all know how spectroscopy and other analytical technologies have played important roles in detecting fraud and in authentication. Paper collages, or photomontages, are part of the art market that is seeing much interest amongst collectors. It is difficult to detect forgeries just through expertise. The use of NIR imaging offers a number of ways to identify forgeries or authenticate the collage non-destructively; from determining the glue used to the revealing of printing on the back of the pieces or paper, which often have been taken from books and magazines.

Read more: Investigation of paper collages by near infrared imaging techniques

   

Synchrotron infrared near-field spectroscopy in photothermal mode

Near-Field_28-6_F3-sThis article demonstrates the capability of the near-field method to probe polymer microspheres within a protein matrix, and we present the first IRSR photothermal near-field Fourier transform infrared (FT-IR) spectrum from within an individual biological cell, which establishes the feasibility of hyperspectral mapping at sub-micrometre resolution in a practical timescale.

Read more: Synchrotron infrared near-field spectroscopy in photothermal mode

   

The CAL(AI)2DOSCOPE: a microspectrophotometer for accurate recording of correlated absorbance and fluorescence emission spectra

Micro_28-6_F2-sThe CAL(AI)2DOSCOPE (Cryogenic Absorption/Luminescence Alignment Independent Alternative Intermittent Detection Optical µSCOPE) is a microspectrometer that was constructed with the aim to facilitate the correlated investigation of absorption and fluorescence emission properties of nanovolumic protein samples under modulatable actinic illumination.

Read more: The CAL(AI)2DOSCOPE: a microspectrophotometer for accurate recording of correlated absorbance and fluorescence emission spectra

   

Glowing colours of foods: application of fluorescence and chemometrics in food studies

FL_28-6_F1-sWhilst the major components of food are usually non-fluorescent, many minor food components that affect its nutritive, compositional and technological quality are fluorescent. Given its sensitivity, ease of use and non-destructive nature, this makes it useful in many applications around monitoring food processing and in fundamental food research.

Read more: Glowing colours of foods: application of fluorescence and chemometrics in food studies

   

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