PSLfood OSL Reader

psl food

The PSLfood is a small, lightweight and portable OSL reader for checking food samples according to EN 13751:2009 if they have been irradiated or not.

Manual OSL reader for checking food samples

Compact and user-friendly

PSLfood is a newly developed PSL System (OSL Reader) for checking irradiated food according to EN 13751:2009 (Detection of irradiated food using photo stimulated luminescence). Compact design and newly developed software combine easy operation and excellent performance.

 The PSLfood drawer is designed for a common petri dish with dimensions of 50 mm in diameter & 20 mm height.

Its small dimensions and weight require very little desktop space and allow using the PSLfood as portable system.

The drawer tray and the protection glass can be easily removed for cleaning.

What is food irradiation?

Food irradiation (gamma rays, electrons or X-rays) is a procedure to destroy parasites, pests and bacteria to extend the shelf life of food.

Food irradiation has been used to treat food since more than 50 years and it is a good alternative to chemical treatment.

How to check if the food samples have been irradiated?

Mineral debris, typically silicates or bioinorganic materials such as calcite which originate from shells or exoskeletons, or hydroxyapatite from bones or teeth, can be found on most foods. These materials store energy in charge carriers trapped at structural, interstitial or impurity sites, when exposed to ionising radiation. Excitation spectroscopy has shown that optical stimulation of minerals releases charge carriers. It has subsequently been shown that the same spectra can be obtained from whole herb and spice samples and other foods using photostimulation. PSL measurements do not destroy the sample, therefore whole samples, or other mixtures of organic and inorganic material, can be measured repeatedly. PSL signals, however, decrease if the same sample is measured repeatedly.


Reference: / 3 biosafety-irradiation-legislation-13751-2002_en.pdf / 3


psl food spices to check with reader

Spices & herbs which can be checked in the PSL reader