20.500.12556/DKUM-84858 The use of a novel smartphone testing platform for the development of colorimetric sensor receptors for food spoilage This work presents a novel smartphone testing platform for the validation of colorimetric sensor receptors (CSRs) in the form of layers that enables reliable and straightforward determination of their color change in a closed system using a commercially available color sensor. The food-compatible model CSR used for the method development was made of black carrot extract and ethyl cellulose. The colorimetric responses were studied in detail for NH3, dimethylamine (DMA), and trimethylamine (TMA) by analyzing changes in the value of the total color difference (ΔE) with the increasing logarithm of the mass concentration (log γ) of the analytes. The method was partially validated for the detection limit (LOD), the limit of quantification, sensitivity, and linear γ range. The fastest reaction times were obtained for the NH3 analyte, while the calculated LOD values were quite similar (1.48 mg L−1 for NH3, 1.55 mg L−1 for DMA, and 1.58 mg L−1 for TMA). The applicability of CSRs was shown for different types of muscle food. Frozen (boneless and skinless) hake fillets were used for additional experimental work in which the color changes of the CSRs were correlated with the values of the total volatile basic nitrogen (TVB-N) and the total counts of aerobic and anaerobic microorganisms. The developed testing platform shows great promise for the development of CSRs that define the quality of a broad variety of muscle food. sensors receptors CSRs colorimetric senzorji kolorimetrika barvni senzorji true false true RSC Publishing (Royal Society of Chemistry) Angleški jezik Slovenski jezik https://pubs.rsc.org/ Znanstveno delo 2023-08-01 14:45:17 2023-08-01 14:45:17 2024-04-16 11:54:04 0000-00-00 00:00:00 2023 0 0 13 str. First published 10 Mar 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-12-25 2023-03-10 2023-03-10 577.161.6 146152451 10.1039/D2AY02082C 1759-9679 The_use_of_a_novel_smartphone_tes-Mastnak-2023.pdf The_use_of_a_novel_smartphone_tes-Mastnak-2023.pdf 1 A6C9D4A88573FDDD41CA642D2A81C661 b0cb96ddca4551a3113106e88d604144ffe3c98bb8e30d6f883dd2a12a7dbccd f13da21a-3069-11ee-8110-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=169144 https://pubs.rsc.org/en/content/articlelanding/2023/AY/D2AY02082C 0 f8625828-3069-11ee-8110-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=169145 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0