Method for measuring residual quantity of harmful heavy metals in printing ink

The invention relates to a method for measuring the residual quantity of harmful heavy metals in printing ink, which belongs to the technical field of heavy metal detection and comprises the following steps: heating and concentrating printing ink to be detected to obtain concentrated printing ink, and condensing and collecting evaporated liquor in the heating and concentrating process; adding a salpeter solution with the mass fraction of 50% into the concentrated ink, heating to 180-200 DEG C, carrying out microwave digestion, and filtering the obtained digested ink by using a membrane filter to obtain a sample to be detected; and measuring the heavy metal concentration in the sample to be measured by adopting a graphite furnace atomic absorption spectrometer, a flame atomic absorption spectrometer and a hydride generation-atomic absorption spectrometer. According to the technical scheme, the determination method is simple, rapid and efficient; the risks of pollution and loss are reduced by using microwave di