2,4二-甲基-6-硝基苯酚(DMNT)分析的探讨

目的]探讨检测2,4-二甲基-6-硝基苯酚样品含量的方法。方法]在试样中加入适量的丙酮,以正十六烷为内标物,在HP-5熔融石英毛细管柱上对试样进行气相色谱分离和测定。结果]在相同的色谱操作条件下,对5个试样进行定量分析,测得2,4-二甲基-6-硝基苯酚的平均回收率为99.85%;在已知含量的2,4-二甲基-6-硝基苯酚试样中,加入不同量的2,4-二甲基-6-硝基苯酚标样,测得标准偏差为0.22,变异系数为0.26%,其线性方程为y=984.5x-28.36,相关系数为0.996。结论]用该方法检测2,4-二甲基-6-硝基苯酚样品含量,具有快速、准确等优点,且重现性、稳定性、分离效果均能满足产品的检验要求,是一种较为理想的分析方法。

Discussion on DMNT Analysis

Objective] The aim was to explore the method for detecting the content of DMNT samples.Method] Adding proper acetone to the tested samples,with the n-hexadecane as the internal standard,the samples were separated and detected by gas chromatography on the HP-5 fused silica capillary column.Result] On the same operation condition of gas chromatography,the 5 samples were analyzed quantitatively and the average recovery rate of DMNT was detected,being 99.85%.Adding different doses of DMNT standard samples to the known content of tested DMNT samples,the standard deviation value was 0.22,the coefficient of variation was 0.26%,the linear equation was y=984.5x-28.36 and the correlation coefficient was 0.996.Conclusion] Detecting the content of DMNT samples using the method had some advantages of rapid speed and accuracy,and its reproducibility,stability and separation effect all could meet the detecting demand of product,being an ideal detecting method.