Picotronica and ThetaMetrisis has signed an agreement for the distribution of ThetaMetrisis products in the market of Africa. Prospective customers from Africa are kindly requested to contact Dr Mohammad Mahmoud for further information on ThetaMetrisis products and demonstration of their capabilities.

Tel: +20 2 2235 6324

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

A miniaturized optical immunosensor based on White Light Reflectance Spectroscopy (WLRS) for the rapid and label-free detection of aflatoxin M1 (AFM1) in milk samples has been developed. WLRS sensing system consists of the measurement set-up and the biochip. The first encompasses the reflection probe, the light source, and the spectrometer, while the latter is a Si chip with a SiO2 layer on top where an AFM1-bovine serum albumin conjugate has been immobilized. The assay was performed by running mixtures of rabbit polyclonal anti-AFM1 antibody with the calibrators or the samples, followed by reaction with biotinylated anti-rabbit IgG antibody and streptavidin. The assay cycle was completed in 25 min, the limit of detection was 6 pg/mL, and the linear working range extended from 0.012 to 2.0 ng/mL. The assay was repeatable (intra-and inter-assay coefficients of variation ranged from 2.1 to 6.3% and 3.5 to 8.2%, respectively) and accurate (percent recovery values ranged from 92.5 to 110%). AFM1 could be detected with the immunosensor developed in both processed and unprocessed milk of different animal species without any dilution. The excellent analytical characteristics and the small instrument size make the proposed sensor suitable for accurate low-cost AFM1 determination in milk samples at the point-of-need.

A new product, FR-uProbe is released. FR-uProbe is a module for reflectance & trasnmittance measurements through any trinocular optical microscope with C-mount.

FR-uProbe is the solution for coating characterization applications that require spot size as small as very few micrometers, such as micropatterned surfaces, samples with irregular surfaces that exhibit a high level of scattering light and numerous others.

With FR-uProbe, local film thickness, optical constants, reflectance, transmission, and absorbance measurements across UV/Vis/NIR, is just a matter of a click.

The standard spot size (area from which the reflectactance or transmittance signal is collected) for 50X objective lens is 5μm and can be as small as 2μm.