Uncertainty Evaluation for the Determination of Aluminum in Dried Tofu by ICP-OES
The alulium content in dried tofu was measured by inductively coupled plasma emission spectrometry,and the uncertainty was evaluated,to provide basis for accurate determination of alulium in dried tofu.The factors affecting the uncertainty were compared,and the source of its uncertainty was analyzed.The content of aluminum in dried tofu was 91.4±7 mg/kg(k=2).The results showed that the uncertainty mainly originated from the standard material,standard solution preparation,the rate of recovery and the standard curve fitting.
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