Evaluation of Uncertainty in the Determination of Formaldehyde Content in Leather by Spectrophotometry
To enhance the control of the laboratory's measurement processes and elevate the reliability and precision of test results,an analysis and assessment of the uncertainty of formaldehyde content testing in leather are conducted based on daily testing scenarios.A method for evaluating the uncertainty of formaldehyde content in leather is established.Utilizing spectrophotometry,the formaldehyde content in leather is measured.By establishing a mathematical model for measurement and applying uncertainty assessment guidelines,the relative uncertainty components introduced during formaldehyde content determination are calculated and evaluated,ultimately leading to an assessment of the uncertainty of the test results.The experiment concludes that the formaldehyde content in leather is 16.96 mg/kg,with an expanded uncertainty of 0.69 mg/kg.Under the experimental conditions,it is determined that the uncertainty arising from the standard solution itself and the absorbance measurement by the spectrophotometer are the primary factors influencing the results.
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