Determination of pitaya quality using portable NIR spectroscopy and innovative low-cost electronic nose

Low-cost electronic-nose (LC-e-nose) systems for the evaluation of plantation and fruit crops: recent advances and future trends

“…The results demonstrated that the equipment could be used for non-climacteric fruits again to distinguish between their distinctive odor variation through ripeness stages, and the possibility of application of this type of sensor for other odors aside from ethylene was considered in other studies with non-climacteric fruit. 70,75…”

“…Due to the lack of ethylene variation, the classification was proposed based on a shelf-life index (SLI), where the ratio falls between TSS and TA, which assigned fruits to 4 different stages, namely SLI30 (day 0), SLI 50 (day 7), SLI 80 (days 14 and 21) and SLI 100 (day 25). 75…”

“…54) while MOS equipment can go as low as 200 or 65 USD. 18,56 Yet competitive MOSs can still beat EC sensors in price in most applications. 52…”

Electronic nose as a tool for early detection of diseases and quality monitoring in fresh postharvest produce: A comprehensive review

“…Quality changes of pitaya were studied by da Silva Ferreira et al. (2023) using a homemade low‐cost EN consisting of 8 MOS sensors coupled with NIR spectroscopy. The pitaya samples in storage were analyzed for their physiochemical features: total phenolics content, TSS, TA, pH, and moisture content at two temperatures (15 and 25°C) on days 0, 7, 14, 21, and 25 after harvesting.…”

Design and application of a paper-based optoelectronic nose for the on-site discrimination of essential oils using a chemometric web app

“…[11][12][13][14] Metal oxide (MOX) and electrochemical (EC) sensors are the most employed sensor elements used for quality control of essential oils and other food products. 15,16 Additionally, using appropriate chemometric tools, it is possible to organize the generated data and then relate them to a particular analyte or sample. In spite of the existence of free versions of the most used tools, most of them require a personal computer to operate, mitigating the use for practical and routine applications.…”