The tests confirmed that, injecting sample after treating isopropyl alcohol, whose substrate composition, the density and the acidity did not change, the more ideal accuracy effect can be gained.

• 实验证实,通过对异丙醇处理后再进样,保证了标准系列中基体组成、浓度及酸度与待测样基本相同,能得到较为理想的准确度效果。