期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 68, 期 49, 页码 14364-14373出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.0c01999
关键词
adulteration; peanut; NMR spectroscopy; metabolomics
资金
- Federal Ministry of Food and Agriculture (BMEL) [2816500914]
- Federal Institute for Agriculture and Food (BLE)
The addition of cheap and also readily available raw materials, such as peanut powder, to visually and chemically similar matrices is a common problem in the food industry. When peanuts are used as an adulterant, there is an additional risk of potential health hazard to consumers as a result of allergy-induced anaphylaxis. In this study, different series of peanut admixtures to visually similar food products, such as powdered hazelnuts, almonds, and walnuts, were prepared and analyzed by H-1 nuclear magnetic resonance (NMR) spectroscopy. For identification, an isolated signal at 3.05 ppm in the H-1 NMR spectrum of polar peanut extract was used as an indicator of peanut adulteration. The chemical marker was identified as (2S,4R)-N-methyl-4-hydroxy-L-proline by resynthesis of the compound and used as an internal standard. The signal-to-noise ratio and the integral of the signal of the marker can both be used to detect peanut impurities. Overall, an approximate limit of detection of 4% admixtures of peanut in various food products was determined using a 400 MHz spectrometer. With regard to food fraud, we present a viable screening method for detection of economic-relevant peanut adulteration.
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