US EPA

7324810 

Journal Article 

Rapid detection of trace formaldehyde in food based on surface-enhanced Raman scattering coupled with assembled purge trap 

Nie, X; Chen, Z; Tian, Y; Chen, S; Qu, L; Fan, M 

2021 

Yes 

Food Chemistry
ISSN: 0308-8146
EISSN: 1873-7072 

340 

127930 

English 

32871357 

10.1016/j.foodchem.2020.127930 

WOS:000594652900015 

https://www.proquest.com/scholarly-journals/rapid-detection-trace-formaldehyde-food-based-on/docview/2524329014/se-2?accountid=171501
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It has been remained a challenge to detect trace formaldehyde in complex samples, such as rice flour and duck blood products. In this study, a purge-trap device was designed and used for volatile target detection, which avoided interference adsorptions on enhanced particle surfaces during subsequent surface-enhanced Raman spectroscopy (SERS) analysis. The device produced a low detection limit for formaldehyde of 1 × 10-4 μg/mL in the concentration ranges of 4 × 10-3-4 μg/mL and 1 × 10-4-3 × 10-3 μg/mL. In the process of the detection of duck blood and rice flour, partial least squares regression (PLSR) was adopted for sample analysis. The formaldehyde concentration was calculated and compared to the actual value from the above model with R2 of 0.97, which indicated high accuracy and stability. These results suggested that the proposed method was reliable and suitable for rapid analysis of trace formaldehyde in real products. 

article; A purge-trap; Computational fluid dynamics; Raman spectroscopy; accuracy; detection limit; food chemistry; formaldehyde; rapid methods; rice flour