adjust buffer total ion strength

Compared with non-warmed period,the PH is lower and overall ion concentration is higher in warmed period.

取暖期降水的pH值低于非取暖期,取暖期降水的总离子浓度则高于非取暖期。

OBJECTIVE To establish an evaluation method of Radix astragali by HPLC-MS total ionic chromatographic fingerprints.

目的建立黄芪药材高效液相-质谱检测器(HPLC-MS)总离子流色谱指纹图谱的评价方法。