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

 

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

 

How standard are your standards?

Tony Davies and Robert Lancashire ask “How standard are your standards?”. They describe a number of the organisations working with standards that affect the spectroscopy field. It looks as if free access to these may be the only way to ensure their longevity.

Read more: How standard are your standards?

   

Representative mass reduction in the laboratory: riffle splitting galore (with or without errors)

Kim Esbensen and Claas Wagner have produced an extensive Sampling column, on “Representative mass reduction in the laboratory: riffle splitting galore (with or without errors)”. They guide readers through the choice of mass reduction equipment and what needs to be done to ensure representative sampling.

Read more: Representative mass reduction in the laboratory: riffle splitting galore (with or without errors)

 

Confidence: the key to quality

Peter Jenks and Alan Nichols plot a path through the accreditation jungle and decide that “Confidence: the key to quality”. With increasing numbers of readers’ labs requiring auditing, ensuring that the reference materials and standards you are using meet the requirements of the auditors is essential.

Read more: Confidence: the key to quality

   

The transparent witness: forensic examination of glass evidence at the Bundeskriminalamt

Glass_28-6_F1sThis article is is a fascinating look into the use of laser ablation inductively coupled plasma mass spectrometry in forensic examination of glass fragments. These are often associated with crime scenes and easily “attach” to any people near them. Thus, they can be used to link criminals to their crime and to provide information on where a glass fragment might have originated.

Read more: The transparent witness: forensic examination of glass evidence at the Bundeskriminalamt

 

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

   

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

 

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

   

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