Food (heavy metal) testing

1 Scope: This standard specifies the inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma emission spectrometry for the determination of multiple elements in food (ICP OES>. The first method is applicable to the determination of boron, sodium, magnesium, aluminum, potassium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, arsenic, selenium, strontium, molybdenum, cadmium, precious metal, antimony, barium, mercury, jun, and lead in food. The second method is applicable to the determination of aluminum, boron, barium, calcium, copper, iron, potassium, magnesium, manganese, sodium, nickel, phosphorus, strontium, titanium, vanadium, and zinc in food. After digestion, the sample is determined by inductively coupled plasma mass spectrometry with elemental characteristics Qualitative analysis using a fixed mass ratio (mass charge ratio, me/z), using the external standard method, is carried out using the intensity ratio of the mass spectrum signal of the element to be measured to the mass harmonic signal of the internal standard element, which is proportional to the concentration of the element to be measured

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