By using the twin injection function, newly installed to the ZA3000 series, lead in milk was analyzed by only diluting with purified water. Milk contains protein, fat, etc. and the stability of the measured values is affected by foams generated during the sample drying stage. By using the specially designed twin cuvette (Pyro D HR), a sample is injected into two different injection ports. Therefore, the size of the liquid droplet is reduced to a half compared to the size when injected in only one port while the amount of the sample injected is the same, resulting in the reduced effect by foaming during the drying. As a result, the analysis with a good reproducibility is possible.
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