反吹气相色谱法测定高温煤焦油中萘含量

采用反吹技术，建立了快速分析高温煤焦油原料中萘含量的分析方法，考察了反吹压力、反吹时间、色谱柱箱温度、溶剂、内标物等因素对分析结果的影响，并建立了内标标准曲线。结果表明，色谱峰面积比与质量比呈较好的线性关系，线性相关系数R2=0.999 9，萘含量的加标回收率在98.5%~101.1%之间，相对标准偏差小于0.5%，方法具有较好的准确性和重复性，可满足高温煤焦油中萘含量的测定要求。

DETERMINATION OF NAPHTHALENE IN HIGH TEMPREATURE COAL TAR BY CHROMATOGRAPHY USING BACK-FLUSH TECHNIQUE

A test method for determination of naphthalene was established by gas chromatography using back-flush technique. The effects of back flushing pressure, back flushing time, chromatographic column temperature, solvent, internal standard were explored, and the internal standard curve were established for quantification. The linear correlation coefficient of quantitative standard curve is 0.999 9, the recovery of naphthalene content is between 98.5%~101.1% with relative standard of deviation less than 0.34%. The method has good accuracy and repeatability and meets the requirement of the determination of naphthalene in high temperature coal tar.