Determination method for quantitatively detecting formaldehyde migration amount in food contact material by using nuclear magnetic resonance hydrogen spectrum

The invention provides a determination method for quantitatively detecting the migration amount of formaldehyde in a food contact material by using a nuclear magnetic resonance hydrogen spectrum, and belongs to the technical field of food contact material detection. The determination method comprises the following steps: determining a hydrogen spectrum for suppressing a water peak or a water peak and an acetic acid peak in the process of determining the food contact material by utilizing nuclear magnetic resonance, and then calculating the migration volume of formaldehyde in the food contact material according to a formula (1), a formula (2) and a formula (3), formula (2): CHCHO = CHCHO-0 * alpha; formula (3): MHCHO = CHCHO * V; wherein CHCHO-0 is the concentration of formaldehyde in an uncorrected sample to be detected, A is the absolute integral area, MW is the relative molecular mass, nH is the number of protons, NS is the number of scanning times, P is the 1H 90-degree pulse width, T is the detection temp