Development of the paper-based colorimetric sensor for simple and fast determination of quercetin in guava leaf extract

Anal Sci. 2023 Jun 7. doi: 10.1007/s44211-023-00380-y. Online ahead of print.ABSTRACTThis present study aimed to develop a paper-based colorimetric sensor in the form of paper-microzone plates (PµZP), for simple and fast quercetin determination in guava leaf extract samples. Here, N-bromosuccinimide (NBS) solution was immobilized on the microzone as a sensing probe, where quercetin solution can be dropped on it to form red-purplish color adducts which can be seen by the naked eye or captured using a flatbed scanner. The color intensity of the microzone can be quantified against a blank solution and used as analytical data in scanometric assay. The sensor showed a response time of 8 min, a linear interval of 1-10 mM with a detection limit at 1.274 mM toward quercetin, and exhibited good reproducibility (RSD < 1%) and accuracy (98-99% recovery). The quercetin level of guava leaf extract determined by the PµZP-scanometric method was found comparable with that of the TLC-densitometric method, suggesting its use as an alternative method for quercetin analysis in the guava leaf extract.PMID:37286858 | DOI:10.1007/s44211-023-00380-y

Source: Anal Sci - June 7, 2023 Category: Chemistry Authors: Mochammad Amrun Hidayat Alfiatur Rohmah Indah Yulia Ningsih Bambang Kuswandi Source Type: research