【摘要】 目的:建立乙酰丙酮分光光度法测定空气中甲醛浓度的实验室内质量控制体系。方法:测定乙酰丙酮分光光度法对空气中甲醛的采样效率、方法的检测下限、精密度和准确度,绘制甲醛测定的均数质量控制图。结果:该方法平均采样效率为95.56%,甲醛浓度(x)和吸光度(y)的线性回归方程为Y=0.1080+0.0370x(r=0.9997),方法的检测下限为0.058μg/ml,加标回收率为102.92%~108.51%,相对标准偏差(n=6)为2.04%~2.15%。结论:实验室内质量控制体系的建立保证了乙酰丙酮分光光度法测定空气中甲醛的结果稳定可靠。更多还原

【Abstract】 Objective:To establish a quality control system in laboratory for determination of formaldehyde in air by acetylacetone spectrophotometry.Methods:Acetylacetone spectrophotometric method was used to determine the concentration of formaldehyde in air.The sampling efficiency,limits of detection,precision and accuracy of the method were determined,and the quality control chart of means was drawn.Results:The average sampling efficiency of the method was 95.56%.The linear regression equation for the concentration of formaldehyde(x) and absorbance(y) was Y=0.1080+0.0370x(r=0.9997).The limits of detection,the recovery of standard addition,the relative standard deviation(n=6) was 0.058 μg/ml,102.92%～108.51%,2.04%～2.15%,respectively.Conclusion:The establishment of the qulity control system in laboratory guarantees a stable,reliable result of formaldehyde determination.更多还原