气相色谱-质谱技术测定沥青蜡含量的研究

Study on the Determination of Wax Content of Asphalt By Gas Chromatography-Mass Spectrometry

沥青的蜡含量是评价沥青质量好坏的重要指标之一,传统的裂解法方法操作过程较复杂.采用气相色谱-质谱(GC-MS)技术,研究了裂解油和沥青蜡的化学组成及碳数分布,同时对沥青裂解油与沥青蜡的正构烷烃碳数分布差异进行了分析,建立了气相色谱-质谱技术测定石油沥青蜡含量的检测方法,方法简单、快速、重复性好、对环境无污染,且能够提供正构烷烃的碳数分布情况.

The wax content of asphalt is one of the important indexes to evaluate the quality of asphalt.The traditionai cracking method is more ccmpliccted in operatioo.In this paper,the gas chromatooraphy-mass spectrometra(GC-MS)was used to analyze the chemical composition and carbon numbee distribution of cracking oil and asphalt wae,and the dtference ot ccrbon number distribution of n-alXanes between cracking oil and asphalt wae was analyzed.A method foe the deteenination of wae content Opetroleum asphalt by gas chromatooraphy-mas spectrometry was developed.It is simpte,rapid,reproducible,non-polluting and can provide the carbon numbeo distibution ot n-alkanes.