毛细管黏度计法测定微晶纤维素聚合度测量不确定度的评估

Evaluation of polymerization degree uncertainty of microcrystalline cellulose determined by capillary viscometry

目的:对毛细管黏度计法测定微晶纤维素聚合度的测量不确定度进行评估。方法:建立数学模型,根据JJF1059.1-2012《测量不确定度的评定与表示》对测量结果的各不确定度来源进行分析和评估。结果:使用黏度计法测量MCC聚合度的不确定度主要来自于特性黏度的测定及重复性。其结果可以表示为224.0±0.6(k=2)。结论 :毛细管黏度计法测定聚合度的测量中,可通过优化特性黏度的测量方式减小不确定度的值。

Objective： To evaluate the uncertainty of polymerization degree of microcrystalline cellulose determined by capillary viscometry. Methods： With establishment of the mathematical model, the main sources of the uncertainty resulted from the determination process were calculated and discussed by the method of JJF1059. 1-2012 Evaluation and expression of uncertainty in measurement. Results： The major uncertainty sources were from measurement of intrinsic viscosity and the test repeatability. The results could be expressed as 224. 0±0.6 （k = 2）. Conclusion： The uncertainty of polymerization degree determined by capillary viscometry can be reduced by optimization of the intrinsic viscometry measurement.