An approach to enhance self-compensation capability in paper-based devices for chemical sensing

Lo, Shih-Jie; Chen, Kuan‐Hung; Yao, Da‐Jeng

doi:10.1016/j.talanta.2015.04.085

Cited by 4 publications

(1 citation statement)

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“…Afterwards, the paper was heated at 105 °C in an oven for 5 min in order to melt the wax so that a hydrophobic barrier could be formed. 10,24 These paper plates were adapted into a plastic support to avoid the analytical zones coming into direct contact with the workbench. Figure 1 represents the approach used in the proposed method.…”

Section: Acidities Determination By the Proposed Tie Methodsmentioning

confidence: 99%

Thermal Infrared Enthalpimetry in Paper Microzone Plates for Green and High Throughput Determination of Wine Acidities

Ferreira¹,

Tischer²,

Cichoski³

et al. 2020

J. Braz. Chem. Soc.

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The use of paper devices in chemical analysis has been increased due to their low cost, high surface area, portability, and biodegradability. A novel use of paper devices is proposed using thermal infrared enthalpimetry (TIE) for a rapid, green, and high throughput determination of wine acidities. The determination of total, fixed, and volatile acidities in red, white, and sparkling wine was carried out, and the results were compared with AOAC titration method. A multichannel pipette was used for reagent addition and an infrared camera for the temperature monitoring. The pipetting and temperature measurement conditions presented direct influence in the deviations among the measurements. The results obtained by TIE presented an agreement between 96 and 104% with the reference method (AOAC 962.12), for all samples. A high sample throughput was achieved reaching 480 samples h-1 for total acidity. A significant reduction in sample volume and reagent consumption was also obtained, with energy consumption up to 60 times lower in relation to the AOAC method. The association of TIE with a paper device provided a rapid, reliable and green method for the determination of acidities of wines.

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Section: Acidities Determination By the Proposed Tie Methodsmentioning

confidence: 99%