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7007744 
Journal Article 
Gold nanoprism/Tollens' reagent complex as plasmonic sensor in headspace single-drop microextraction for colorimetric detection of formaldehyde in food samples using smartphone readout 
Qi, T; Shi, H; Lee, H; Xu, M; Yao, Yao; Chen, W; Xu, M; Tang, S; Shen, Wei; Kong, D; Cai, X; , 
2020 
Talanta
ISSN: 0039-9140
EISSN: 1873-3573 
ELSEVIER 
AMSTERDAM 
220 
121388 
English 
In this work, an assay with high sensitivity and selectivity for the detection of formaldehyde (FA) is presented. The assay applied a gold nanoprism/Tollens' reagent (Au-np/TR) complex as the sensor used in headspace single-drop microextraction (HS-SDME). A surface plasmon resonance signal enhancement as well as color change was caused by the formation of Au@Ag-np after a redox reaction between FA and TR during the HSSDME process. With the utilization of smartphone nanocolorimetry (SNC), the FA could be detected and quantified. For HS-SDME-SNC, a linearity calibration curve ranging from 0.1 to 100 mu M was obtained, and the limit of detection was determined to be 30 nM. Successful attempts to determine FA were demonstrated by analysis of the analyte in (adulterated) raw food samples (octopus and chicken flesh). Matrix effects from real samples were avoided by using HS-SDME, and only a 3-mu L droplet of solvent was needed in the assay. 
article; Gold nanoprism; Tollens' reagent; Smartphone nanocolorimetry; Formaldehyde; Headspace single-drop microextraction; calibration; chicken meat; colorimetry; detection limit; droplets; headspace analysis; microextraction; mobile telephones; nanogold; nanoprisms; raw foods; redox reactions; solvents; surface plasmon resonance 
IRIS
• Formaldehyde [archived]
     HAWC
          Mechanistic inflammation
               Excluded
     Search Update 2018-2021
          Inflammation/Reactive oxygen Species
               WoS
• IRIS Formaldehyde (Inhalation) [Final 2024]
     Literature Indexing
          WoS
          2021 Systematic Evidence Map
     Literature Identification
          Inflammation and Immune-Related Mechanistic Studies
               Excluded