A ratiometric fluorescent sensor based on carbon dots for rapid determination of bisulfite in sugar

Green and facile synthesis of silicon-doped carbon dots and their use in detection of Hg2+ and visualization of latent fingerprints

“…11 These techniques have been successfully used to trace Hg 2+ in many related samples, but the mentioned methods generally require experts to operate under complicated experiment conditions, and the analytical instruments used are expensive and time-consuming, which significantly impedes the development of real-time and on-site detection of Hg 2+ in practical applications. 12,13 To promote in situ testing of real samples, portable fluorescence detection has been greatly encouraged, with fast response time, high sensitivity and selectivity. 14 Therefore, the design and fabrication of fluorescent probes for heavy metal ions with portable, easier operation and high sensitivity is very urgent and desirable.…”

Switchable biomimetic nanochannels for on-demand SO2 detection by light-controlled photochromism

“…Therefore, it is highly desirable to develop high-performance sensors for the accurate determination of SO 2 and realize their application in various sample essays. The number of solution-based fluorescent probes for SO 2 is quickly increasing 12 , 32 , 33 , but the development of nanochannel-based SO 2 detectors is still in the early stage. In 2020, Sun et al reported the first and only SO 2 nanochannel sensor 34 , which was constructed by modifying the nanochannel surface with active ketone groups.…”

Nanoenzyme Reactor-Based Oxidation-Induced Reaction for Quantitative SERS Analysis of Food Antiseptics

“…With the development in food science and technology, various antiseptics such as butylated hydroxyanisole [ 26 ], butylated hydroxytoluene, tertiary butylhydroquinone, ascorbic acid [ 27 ], or polyphenols have been used to hinder the oxidation of certain constituents present in food products. Different types of analytical methods including chromatography [ 28 ], electrochemistry [ 29 ], and fluorescence spectroscopy [ 30 ] have been utilized to analyze antiseptics [ 31 ]. Tungkijanansin developed a headspace solid-phase microextraction (HS-SPME) method combined with gas chromatography-flame ionization detector (GC-FID) for the determination of benzoic acid, sorbic acid and propionic acid in fermented food samples with detection limits of 1.1–1.7 mg L −1 [ 26 ].…”