一、前言液体石蜡是我厂分子筛脱蜡车间的产品,是提供给全国各合成洗涤剂厂作为生产烷基苯磺酸钠的原料。为此要严格控制液体石蜡的芳烃含量在1%以下。十年来,分析我厂液体石蜡小芳烃含量一直遵照“SY2857—75S液体石蜡中芳烃含量测定法(比色法)”。此方法采用硫酸—甲醛试剂与试样中的芳烃显色,即硫酸—甲醛在与芳烃反应时先使芳烃和甲醛缩合,然后再使生成的二芳基甲撑化合物氧化而成有色的对—醌型 I. Introduction Liquid paraffin is the product of molecular sieve dewaxing workshop in our factory. It is supplied to all synthetic detergent plants in the country as raw materials for the production of sodium alkyl benzene sulfonate. To this end, we must strictly control the aromatic content of liquid paraffin below 1%. Decades, the analysis of small paraffin plant aromatic content of our plant has been in compliance with “Determination of aromatics content SY2857-75S liquid paraffin (colorimetric method).” This method uses sulfuric acid - formaldehyde reagent and the sample of the aromatics color, that is, sulfuric acid - formaldehyde in the reaction of aromatics and formaldehyde first condensation, and then the resulting diaryl methyl compounds oxidation and a colored p - Quinolate