Sorting of apricots with computer screen photoassisted spectral reflectance analysis and electronic nose

Metalloporphyrins based artificial olfactory receptors

“…Compared with the use of digital scanners, to probe the sample with a variable combination of wavelengths instead of use the white light of scanners, gives the possibility to incorporate into an optical fingerprint both the absorbance and the fluorescence of a sample. CSPT has demonstrated its utility to study optical changes in biological samples [40] to characterize fruits according to hyperspectral imaging [41], and to classify chemicals through the measure of the changes of optical properties of metalloporphyrin layers [42].…”

Computer screen photo-assisted techniques for global monitoring of environmental and sanitary parameters

“…Although not specifically covered in the present review, again the availability and nature of the instrumental platform will be of large interest for the dissemination of tests today mainly performed in laboratories. Our initial tests on fruit and wine evaluating only their natural colors are very encouraging in this respect [49].…”

“…Depending on the application, different optical properties have been evaluated, such as transmittance [16,22,32], reflectance [47][48][49], fluorescence [33,43,45,46,18] and polarization [34,44]. The way that the light source is operated becomes defined by each particular problem, for instance, kinetic measurements of transmittance can be done at an optimized illuminating color that reflects the largest changes in transmittance upon reaction with target analytes [32,41,42].…”

Chemical sensors

“…The results allowed for detection of an optimum shelf life of pineapples at various temperatures. In another example of this kind, DiNatale and colleagues applied a combination of a webcam and an array of eight QCMs coated with various metalloporphyrins for sorting of apricots (DiNatale et al, 2006). The fruits were transported on a conveyor belt where they were photographed and their olfactory features were sensed.…”