In reversed phase high performance liquid chromatography,the baseline drift and the artifactual bands in blank gradient elution might result form the impurities from both weak aqueous and strong organic solvent.

Results show NO-3 solute peaks in soil with or without evaporation all will get steeper,narrower,higher peak values and slower movement downward,and the depths of NO-3 solute peak and front is obviously shallower with evaporation than without evaporation as irrigation frequency increased.

The fluid inclusions of the metamorphic peak time for the Archaean granulite series in the Taipingzhai Lozishan district, eastern Hebei Province were first found in sillimanite According to their shapes and occurrences, these inclusions can be subdivided into three types The earliest type is the isolated inclusions and inclusions in clusters with negative hexogonal, prismatic crystal forms.