A convenient way of treating solvents before introduction into the reservoir (储液瓶) is to filter them through a millipore filter with () under vacuum.
A. 0.5μm
B. 0.45μm
C. 0.55μm
D. 0.6μm
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Which of the following is not a key component in HPLC ()?
A. Column
B. High pressure pump
C. Detector
Data processing system
HPLC法定性的参数是()
A. 最大吸收波长
B. 最小吸收波长
C. 保留时间
D. Rf值
反相色谱柱用什么溶剂保存( )
A. 甲醇、乙腈
B. 水
C. 正丙醇
D. 正己烷
在反相色谱法中,若以甲醇-水为流动相,增加甲醇的比例时,组分的()
A. k和tR增加
B. k和tR减小
C. k和tR不变
D. k增加,tR减小