论文部分内容阅读
用浓H_2SO_4作浴液测定固体有机化合物的熔点时,常常出现有机物落入浓H_2SO_4中使溶液变黑的现象,一般加入NaNO_3,加热后即可使之褪色,本文对其机理进行了探讨.
When using concentrated H2SO4 as the bath to measure the melting point of the solid organic compounds, the organic matter often falls into the concentrated H2SO4 so that the solution turns black. Generally, NaNO3 is added to make it fade after heating. The mechanism is discussed in this paper.