scholarly journals Nonlinear interferometer for Fourier-transform mid-infrared gas spectroscopy using near-infrared detection

2021 ◽  
Vol 29 (3) ◽  
pp. 4035
Author(s):  
Chiara Lindner ◽  
Jachin Kunz ◽  
Simon J. Herr ◽  
Sebastian Wolf ◽  
Jens Kießling ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Near Infrared ◽  
Infrared Detection ◽  
Mid Infrared ◽  
Nonlinear Interferometer

Vibrational spectroscopy in practice: Detection of mineral oil in sunflower oil with near- and mid-infrared spectroscopy

NIR news ◽  
2018 ◽  
Vol 29 (3) ◽  
pp. 6-11 ◽  
Author(s):  
Michael K-H Pfister ◽  
Bettina Horn ◽  
Janet Riedl ◽  
Susanne Esslinger ◽  
Carsten Fauhl-Hassek
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Sunflower Oil ◽  
Near Infrared ◽  
Limit Of Detection ◽  
Model Performance ◽  
Mineral Oil ◽  
Food Ingredient ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy

Fourier transform infrared spectroscopy becomes increasingly important for detecting adulterations in food due to a minimal sample preparation and a fast nondestructive measurement. Sunflower oil is a popular food ingredient, which might be contaminated or even adulterated by compounds with health concerns such as mineral oil. In this context a feasibility study was performed to compare the suitability of near- and mid-infrared spectroscopy for detecting mineral oil in sunflower oil. For this purpose, sunflower oils spiked with mineral oil in the concentration range of 0.001–1.0% w/w were analyzed by Fourier transform near- and mid-infrared spectroscopy, respectively, and spectra data were preprocessed prior to partial least squares regression. Hereby, the data preparation was optimized for each technique to account for model performance influences. The model performance was fairly similar for both approaches with a slightly better precision and thus limit of detection (near infrared 0.12% w/w, mid infrared 0.16% w/w) for the near-infrared-based model compared to the mid-infrared model. Consequently, both techniques are considered suitable for the determination of mineral oil in sunflower oil in the context of food authentication.

scholarly journals Detection of Profenofos in Chinese Kale, Cabbage, and Chili Spur Pepper Using Fourier Transform Near-Infrared and Fourier Transform Mid-Infrared Spectroscopies

ACS Omega ◽  
2021 ◽  
Author(s):  
Atchara Sankom ◽  
Warapa Mahakarnchanakul ◽  
Ronnarit Rittiron ◽  
Tanaboon Sajjaanantakul ◽  
Thammasak Thongket
Keyword(s):  
Fourier Transform ◽  
Near Infrared ◽  
Mid Infrared ◽  
Chinese Kale
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