采用气相色谱分析十六烷值改进剂硝酸2-乙基己酯的纯度

Purity of 2-ethylhexyl nitrate improved by analyzing hexadecane number with gas chromatography

采用氢火焰离子检测器气相色谱测定法,根据组分保留时间和相对质量校正因子归一化法对柴油十六烷值改进剂硝酸2-乙基己酯样品进行定性和定量分析,考察了该方法的精密度和准确性。结果表明:样品2次平行测定结果的差值不大于0.3%,均小于平均值的0.5%;重复测试5次的相对误差均不大于0.5%,该方法真实可靠,可满足样品纯度分析的要求。

Based on the component retention time and the relative mass correction factor normalization method, the qualitative and quantitative analysis of 2-ethylhexyl nitrate with cetane number as an improver for diesel, were determined by gas chromatography with hydrogen flame ionic detector, and the precision and accuracy were investigated. The results showed that the difference value between the two parallel experiments was not more than 0.3% and both were less than 0.5% of the average value;the relative error of repeated experiments for five times was not more than 0.5%, indicating that the method was reliable and could meet the requirements of sample purity analysis.