Method for determining various heavy metals in water-based adhesive for cigarettes after direct dilution

The invention belongs to the field of determination of heavy metals in water-based adhesives for cigarettes, and particularly relates to a method for determining multiple heavy metals in a water-basedadhesive for cigarettes after direct dilution. The method includes: taking the multi-element mixed standard solution containing arsenic, lead, cadmium, chromium and nickel elements, and diluting thesolution with 5% nitric acid to a constant volume to obtain multi-element mixed standard solutions of arsenic, lead, cadmium, chromium and nickel with different concentrations; preparing a sample blank solution according to the steps; selecting Ge, In and Bi elements as internal standards, and drawing a standard curve; calculating the concentration of each element from the standard line; and according to the weight of the water-based adhesive and the calculated concentration of each element, calculating and obtaining the content of the arsenic, lead, cadmium, chromium and nickel elements. According to the method, the d