Facile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array
Rapid and facile determination of pesticides is critically important in food and environmental monitoring. This study developed a self-assembled gold nanoparticle array based SERS method for highly specific and sensitive detection of acetamiprid, a neonicotinoid pesticide that used to be difficult i...
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2021
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oai:doaj.org-article:9d233761c3d94353bb41b3a65be213272021-11-25T17:13:45ZFacile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array10.3390/chemosensors91103272227-9040https://doaj.org/article/9d233761c3d94353bb41b3a65be213272021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9040/9/11/327https://doaj.org/toc/2227-9040Rapid and facile determination of pesticides is critically important in food and environmental monitoring. This study developed a self-assembled gold nanoparticle array based SERS method for highly specific and sensitive detection of acetamiprid, a neonicotinoid pesticide that used to be difficult in SERS analysis due to its low affinity with SERS substrates. SERS detection and quantification of acetamiprid was conducted with self-assembled gold nanoparticle arrays at the interface of chloroform and water as the enhancing substrate. Since targets dissolved in chloroform (organic phase) also have access to the hot-spots of Au NP array, the developed method exhibited good sensitivity and specificity for acetamiprid determination. Under the optimal conditions, SERS intensities at Raman shifts of 631 cm<sup>−1</sup> and 1109 cm<sup>−1</sup> displayed a good linear relationship with the logarithm concentration of acetamiprid in the range of 5.0 × 10<sup>−7</sup> to 1.0 × 10<sup>−4</sup> mol/L (0.11335 ppm to 22.67 ppm), with correlation coefficients of 0.97972 and 0.97552, respectively. The calculated LOD and LOQ of this method were 1.19 × 10<sup>−7</sup> mol/L (0.265 ppb) and 2.63 × 10<sup>−7</sup> mol/L (0.586 ppb), respectively, using SERS signal at 631 cm<sup>−1</sup>, and 2.95 × 10<sup>−7</sup> mol/L (0.657 ppb) and 3.86 × 10<sup>−7</sup> mol/L (0.860 ppb) using SERS signal at 1109 cm<sup>−1</sup>, respectively. Furthermore, the developed SERS method was successfully applied in determining acetamiprid on the surface of apple and spinach. This method offers an exciting opportunity for rapid detection of acetamiprid and other organic pesticides considering its advantages of simple preparation process, good specificity and sensitivity, and short detection time (within 1 h).Panxue WangYan SunLi WangXiang LiMiaomiao LiuGuoliang LiMDPI AGarticlepesticidesrapid detectionquantificationportable Raman spectrometerself-assembled gold nanoparticle arrayBiochemistryQD415-436ENChemosensors, Vol 9, Iss 327, p 327 (2021) |
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DOAJ |
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DOAJ |
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pesticides rapid detection quantification portable Raman spectrometer self-assembled gold nanoparticle array Biochemistry QD415-436 |
| spellingShingle |
pesticides rapid detection quantification portable Raman spectrometer self-assembled gold nanoparticle array Biochemistry QD415-436 Panxue Wang Yan Sun Li Wang Xiang Li Miaomiao Liu Guoliang Li Facile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array |
| description |
Rapid and facile determination of pesticides is critically important in food and environmental monitoring. This study developed a self-assembled gold nanoparticle array based SERS method for highly specific and sensitive detection of acetamiprid, a neonicotinoid pesticide that used to be difficult in SERS analysis due to its low affinity with SERS substrates. SERS detection and quantification of acetamiprid was conducted with self-assembled gold nanoparticle arrays at the interface of chloroform and water as the enhancing substrate. Since targets dissolved in chloroform (organic phase) also have access to the hot-spots of Au NP array, the developed method exhibited good sensitivity and specificity for acetamiprid determination. Under the optimal conditions, SERS intensities at Raman shifts of 631 cm<sup>−1</sup> and 1109 cm<sup>−1</sup> displayed a good linear relationship with the logarithm concentration of acetamiprid in the range of 5.0 × 10<sup>−7</sup> to 1.0 × 10<sup>−4</sup> mol/L (0.11335 ppm to 22.67 ppm), with correlation coefficients of 0.97972 and 0.97552, respectively. The calculated LOD and LOQ of this method were 1.19 × 10<sup>−7</sup> mol/L (0.265 ppb) and 2.63 × 10<sup>−7</sup> mol/L (0.586 ppb), respectively, using SERS signal at 631 cm<sup>−1</sup>, and 2.95 × 10<sup>−7</sup> mol/L (0.657 ppb) and 3.86 × 10<sup>−7</sup> mol/L (0.860 ppb) using SERS signal at 1109 cm<sup>−1</sup>, respectively. Furthermore, the developed SERS method was successfully applied in determining acetamiprid on the surface of apple and spinach. This method offers an exciting opportunity for rapid detection of acetamiprid and other organic pesticides considering its advantages of simple preparation process, good specificity and sensitivity, and short detection time (within 1 h). |
| format |
article |
| author |
Panxue Wang Yan Sun Li Wang Xiang Li Miaomiao Liu Guoliang Li |
| author_facet |
Panxue Wang Yan Sun Li Wang Xiang Li Miaomiao Liu Guoliang Li |
| author_sort |
Panxue Wang |
| title |
Facile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array |
| title_short |
Facile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array |
| title_full |
Facile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array |
| title_fullStr |
Facile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array |
| title_full_unstemmed |
Facile Detection and Quantification of Acetamiprid Using a Portable Raman Spectrometer Combined with Self-Assembled Gold Nanoparticle Array |
| title_sort |
facile detection and quantification of acetamiprid using a portable raman spectrometer combined with self-assembled gold nanoparticle array |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/9d233761c3d94353bb41b3a65be21327 |
| work_keys_str_mv |
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