目的:介绍原子吸收分光光度法测定乳酸钠林格注射液中氯化钾不确定度的评价。方法:确定和计算测定过程各不确定度分量,最后整体合成。结果:原子吸收分光光谱法测定乳酸钠林格注射液中氯化钾不确定度为2.50%。结论:本方法评定过程合理,步骤清晰,不重复和遗漏。 Objective: To evaluate the uncertainty of potassium chloride in sodium lactate Ringer’s injection by atomic absorption spectrophotometry. Methods: To determine and calculate the uncertainty components of the measurement process, the final overall synthesis. Results: The uncertainty of potassium chloride in sodium lactate Ringer’s injection was 2.50% when determined by atomic absorption spectrophotometry. Conclusion: The method is reasonable, the procedure is clear, non-repetitive and omission.