分子筛吸附法测定石蜡中正异构烃

The Determination of n-and i-paraffins in Paraffin Wax by Molecular Sieve Adsorption

采用两步分子筛吸附的方法测定石蜡的正异构烃类含量，所用仪器简单，操作简便，数据重复性好，相对标准偏差小于±１％，与气相色谱法的结果对比较好，并进行了实际蜡样的测定，证明本方法实用性较强，具有推广价值。

The method for the determination of n-and i-paraffins in paraffin wax, by the useof 5A molecular sieve as adsorbent,isooctane as solvent, under the condition of reflux,was discussed.Some wax samples were determined and the results were compated with that of GC.This method is simple to operat and give an accurate and precise result with the TSD less than 士1%.