水煤浆中氮的测定方法研究

Method of Testing Nitrogen in Coal Slurry

研究了用开式定氮法测定水煤浆中氮含量的方法 ,探讨了浆样量的确定和水煤浆固体试样以及浆体试样均匀性的检验方法 ;对于两种制取水煤浆试样方式 ,即可替代方式和重复测定方式的精确度进行了比较 .结果表明 :两种制样方法可以互相替代 ,且其差值在 99%的置信区间均小于同一实验室测定煤中氮的允许差 ,测定结果的重复性均与煤中氮测定的重复性一致 。

Method of determining nitrogen in coal\|slurry was researched. The determination of slurry quantity, the method for testing the homogeneity of both solid and slurry samples were discussed. The accuracy of replaceable sample was compared with that of repeatable sample. The result shows that the two kinds of making samples are replaceable, and the error is smaller than the allowable one. In addition, the repeatability of this method is in accordance with that of the one used before.