Abstract
Sodium thiocyanate (NaSCN) is normally used as a kind of food preservative in daily life, but using excessive NaSCN in milk would cause the low absorption of iodine in human body, and then would make the normal secretion of thyroid hormone disorder. In this study, we developed a method combines AgNPs and MIL-101(Fe) which is a kind of Metal organic frameworks materials as a kind of composite Surface Enhanced Raman Scattering (SERS) substrate and achieved the determination of NaSCN in spiked milk. The characteristic peak of NaSCN at 2110 cm−1 showed obvious SERS enhancement and has good linearity with the concentration of NaSCN in milk. Through the simple and rapid detection, the limit of detection in water and milk was calculated as 18.5 μg/L and 96.3 μg/L with the correlation coefficient of 0.991 and 0.988 respectively. This work provides a new method to detect NaSCN in milk and expands the application of SERS in food detection.
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