Quantitative colorimetric sensing of heavy metal ions via analyte-promoted growth of Au nanoparticles with timer or smartphone readout

Hua, Fei; Pan, Fenglan; Yang, Juanhua; Yan, Yongkang; Huang, Xueer; Yuan, Yali; Nie, Jinfang; Wang, Hua; Zhang, Yun

doi:10.1007/s00216-023-04669-9

Cited by 6 publications

(2 citation statements)

References 44 publications

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“…AuNPs are easily functionalized, visualized and coordinable than other metal nanoparticles, AuNPs have been extensively investigated for the detection of heavy metal ions with colorimetric signals. Hua et al (2023) developed two convenient, instrument-free new strategies for the instantaneous determination of Cu(II) and Hg(II). The analytes promoted the reduction of chloroauric acid to different forms of AuNPs, resulting in different color variations.…”

Section: Colorimetric Sensingmentioning

confidence: 99%

Research progress in the detection of trace heavy metal ions in food samples

Si,

Wu,

Jin

et al. 2024

Front. Chem.

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Food safety is the basis for ensuring human survival and development. The threat of heavy metal ions to food safety has become a social concern with the rapid growth of the economy and the accompanying environmental pollution. Some heavy metal ions are highly toxic even at trace levels and pose significant health risks to humans. Therefore, ultrasensitive detection of heavy metal ions in food samples is important. In this mini-review, recent advances in the analytical methods based on nanomaterials for detecting trace heavy metal ions in food samples are summarized in three categories: electrochemical, colorimetric, and fluorescent methods. We present the features and sensing mechanisms of these three methods, along with typical examples to illustrate their application in the detection of heavy metal ions in foods. This mini-review ends with a discussion of current challenges and future prospects of these approaches for sensing heavy metal ions. The review will help readers understand the principles of these methods, thereby promoting the development of new analytical methods for the detection of heavy metal ions in food samples.

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Section: Colorimetric Sensingmentioning

confidence: 99%

Research progress in the detection of trace heavy metal ions in food samples

Si,

Wu,

Jin

et al. 2024

Front. Chem.

View full text Add to dashboard Cite

show abstract

“…The following year, Xu et al 49 developed a microdot array-based ultra-wettable fluorescence method for the simultaneous separation and detection of Fe 3+ and Cu 2+ ions in red wine samples. In 2023, Hua et al 50 succeeded in developing two new, simple, low-cost strategies that do not require quantitative readings from an instrument, but only an inexpensive timer, a laser pointer, and a smartphone to achieve a low LOD of 3.5 nM Cu 2+ and 0.1 nM Hg 2+ , which can be used for the instantaneous determination of Cu 2+ and Hg 2+ ions. The great contribution of these studies to the development of new strategies for the detection of heavy metal ions is indelible.…”

Section: Application Of Fluorescent Cofs For Environmental Pollutant ...mentioning

confidence: 99%