AN 23 - Picarro CM-CRDS Using the Approved AOAC Internal Standard Isotope Ratio Analysis (ISCIRA) Method for Honey (AOAC 998.121)
This note provides details about a Picarro CRDS-based fast screening method to test for adulteration with corn or cane sugar.
Honey is one of a number of natural products that are regularly tested for adulteration with lower cost sweeteners such as High Fructose Corn Syrup (HFCS) and cane sugar. Such frequent adulteration poses a problem for scrupulous honey producers and importers who end up operating at a cost disadvantage. The problem is significant enough that U.S. Customs and Border Protection agents regularly test for adulteration in honey shipments.
Previous work (AN022) has shown that the faster and less costly Picarro Combustion Module-Cavity Ring-Down Spectroscopy system (CM-CRDS) provides δ13C values equivalent or better than values obtained using Isotope Ratio Mass Spectroscopy (IRMS) for honey samples. This study has been extended to cover the published ISCIRA method2. The data again shows excellent precision. The results further validate the use of the Picarro CM-CRDS as a screening tool for food products.