Background The colorimetric sensor array technology simulates human olfaction to analyze,
identify and examine complex gas and volatility based on chem-responsive dyes. Unlike …

Food safety and quality are of importance in daily life. Colorimetric sensors can be used to
rapidly and sensitively detect food safety and quality parameters. In this review, we …

Conductive polymer hydrogels (CPHs), which combine the unique advantages of hydrogels
and organic conductors, have received wide attention due to their adjustable mechanical …

To date, hydrogels have gained attraction due to their inherent advantages such as wide
selection of precursors and additives, low toxicity, easy shape control, and biological …

Food quality monitoring and freshness assessment are critical for ensuring food safety at a
large scale. Ammonia is used as an important indicator of protein rich food spoilage state …

Humidity interferes most gas sensors, especially colorimetric sensors. The conventional
approaches to minimize the humidity interference in colorimetric gas sensing require using …

Currently, because of the harmful effects of ammonia on human health, ecosystems, and
overall air quality, the development of easily usable, portable, cost-effective, and field …

Colorimetric sensing technologies have been widely used for both quantitative detection of
specific analyte and recognition of a large set of analytes in gas phase, ranging from …

Colorimetric sensing is a low-cost, intuitive method for monitoring the freshness of food. We
prepared a colorimetric strip sensor array by mixing different amounts of bromophenol blue …

Previous studies have shown that breath ammonia (breath-NH 3) concentration is
associated with blood urea nitrogen (BUN) levels. However, interindividual variations in …