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Development of a Novel Metal Grating and Its Applications of Terahertz Spectroscopic Detection of CuSO4 in Fruit
- Source :
- Food Analytical Methods. 14:1590-1599
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- As a novel detection method of CuSO4, terahertz (THz) spectroscopy detection has great application prospects, but the terahertz detection with the tablet method has low sensitivity, and with the metamaterials has complicated manufacture. This work has proposed a high-sensitivity pesticide THz spectroscopic detection method with a novel metal grating. The metal grating was composed of a circular hole array. It was made by laser micromachining technology to provide a simplified but improved measurement and had a strong transmission peak at the 0.4–1.0 THz band. The results indicated that the addition of copper sulfate (CuSO4) solutions to different concentrations caused the transmission peak frequency to shift red. The detection limit was about 103 times higher than that of CuSO4 measured on the polyethylene (PE) film substrate, which reached 0.375 mg/L. The method was applied for detecting CuSO4 in apple and grape, and the relative error was less than 5.8%. The metal grating combined with Terahertz time-domain spectroscopy (THz-TDS) can improve the sensitivity of sample detection and realize the detection and analysis of trace elements.
- Subjects :
- Detection limit
Materials science
business.industry
Terahertz radiation
010401 analytical chemistry
Metamaterial
04 agricultural and veterinary sciences
Substrate (electronics)
Polyethylene
040401 food science
01 natural sciences
Applied Microbiology and Biotechnology
0104 chemical sciences
Analytical Chemistry
chemistry.chemical_compound
0404 agricultural biotechnology
chemistry
Transmission (telecommunications)
Optoelectronics
Safety, Risk, Reliability and Quality
Spectroscopy
business
Safety Research
Sensitivity (electronics)
Food Science
Subjects
Details
- ISSN :
- 1936976X and 19369751
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- Food Analytical Methods
- Accession number :
- edsair.doi...........8429a39124bc829e7140436270a58ff1