Carbon dots-modified paper-based chemiluminescence device for rapid determination of mercury (II) in cosmetics

Iman Al Yahyai, Haider A.J. Al-Lawati*, Javad Hassanzadeh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Here, a simple and portable paper-based analytical device (PAD) based on the inherent capability of carbon quantum dots (CQDs) to serve as a great emitter for the bis(2,4,6-trichlorophenyl)oxalate (TCPO)–hydrogen peroxide (H₂O₂) chemiluminescence (CL) reaction is introduced for the detection of harmful mercury ions (Hg2+). The energy is transferred from the unstable reaction intermediate (1,2-dioxetanedione) to CQDs, as acceptors, and an intensive orange-red CL emission is generated at ~600 nm, which is equal to the fluorescence emission wavelength of CQDs. The analytical applicability of this system was examined for the determination of Hg2+. It was observed that Hg2+ could significantly quench the produced emission, which can be attributed to the formation of a stable and nonluminescent Hg2+–CQDs complex. Accordingly, a simple and rapid PAD was established for monitoring Hg2+, with a limit of detection of 0.04 μg ml−1. No interfering effect on the signal was found from other examined cations, indicating the acceptable specificity of the method. The designed assay was appropriately utilized to detect Hg2+ ions in cosmetic samples with high efficiency. It was characterized by its low cost, ease of use, and was facile but accurate and high selective for the detection of Hg2+ ions. In addition, the portability of this probe makes it suitable for on-site screening purposes.

Original languageEnglish
Pages (from-to)1087-1097
Number of pages11
Issue number7
Publication statusPublished - Jul 2022


  • carbon quantum dots
  • chemiluminescence
  • mercury ion
  • paper-based analytical device

ASJC Scopus subject areas

  • Biophysics
  • Chemistry (miscellaneous)


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