Melamine Detection in Infant Formula Powder Using Near- and Mid-Infrared Spectroscopy

作者：Mauer Lisa J^*; Chernyshova Alona A; Hiatt Ashley; Deering Amanda; Davis Reeta

来源：Journal of Agricultural and Food Chemistry, 2009, 57(10): 3974-3980.

DOI：10.1021/jf900587m

• Melamine detection
• infant formula powder
• infrared spectroscopy

Near- and mid-infrared spectroscopy methods (NIR, FTIR-ATR, FTIR-DRIFT) were evaluated for the detection and quantification of melamine in infant formula powder. Partial least-squares (PLS) models were established for correlating spectral data to melamine concentration: R(2) > 0.99, RMSECV <= 0.9, and RPD >= 12. Factorization analysis of spectra was able to differentiate unadulterated infant formula powder from samples containing 1 ppm melamine with no misclassifications, a confidence level of 99.99%, and selectivity > 2. These nondestructive methods require little or no sample preparation. The NIR method has an assay time of 1 min, and a 2 min total time to detection. The FTIR methods require up to 5 min for melamine detection. Therefore, NIR and FTIR methods enable rapid detection of 1 ppm melamine in infant formula powder.

• 出版日期2009-5-27