Paper-based colorimetric sensors for point-of-care testing

Abstract

By eliminating the need for sample transportation and centralized laboratory analysis, point-of-care testing (POCT) enables on-the-spot testing, with results available within minutes, leading to improved patient management and overall healthcare...

Saliva sampling strategies affecting the salivary glucose measurement

“…Similar to blood glucose measurement (BGM), SGM analysis could be sharply affected by the time slot during which the saliva is collected. 57 To date, however, very limited studies have explicitly investigated the SGM results over a long period, leading to our decit understanding of SGM variations caused by daily activities, such as eating and sleeping. To circumvent this critical issue, 31 subjects with similar body and health conditions were subjected to continuous SGM analysis every 30 min, during the subjects' active period of 6:00 am to 12:00 am (the next day).…”

Sodium alginate hydrogelation mediated paper-based POCT sensor for visual distance reading and smartphone-assisted colorimetric dual-signal determination of l-lactate

“…34–36 However, paper-based sensors are usually employed in semi-quantitative detection based on visual colorimetry, which cannot present the exact concentrations of samples. 37,38 Recently, to perfect this flaw, a portable colorimetry device with self-calibrating capability based on smartphone application software has been reported, and this could output exact concentrations of the samples obtained from colorimetry.…”

Hydrothermal synthesis of B, S, and N-doped carbon quantum dots for colorimetric sensing of heavy metal ions

“…Colorimetric sensors provide a great advantage in their ability to be detected quickly and with the naked eye. 22 Quantum dots (QDs) are among the nanomaterials used for colorimetric detection of heavy metals. Two detection mechanisms can be mentioned for colorimetric detection for CQDs.…”