紫外分光光度法分析油气化探样品中芳烃及其衍生物类化合物

应用紫外分光光度法分析芳烃及芳烃衍生物，以苯、萘、菲3种物质作为代表性物质，选用正己烷为溶剂，在5个特征波长下测试物质的吸光强度.检出限为12.9×10^-9~20.5×10^-9，空白加标准确度为98.9%~101.4%，精密度为3.73%~4.51%，实际样品的加标回收分析基本满足要求.在分析测试方法上做了优化，对环境污染小，对人体毒害低，安全性高，既缩减了成本又提高了效率.该方法的准确度精密度高，简便易行，可满足地质行业分析测试的要求，适用于油气化探样品中芳烃类的大批量集中分析测试.

ANALYSIS OF AROMATICS AND THEIR DERIVATIVES IN OIL-GAS GEOCHEMICAL SAMPLES BY ULTRAVIOLET SPECTROPHOTOMETRY

The ultraviolet spectrophotometry is used to analyze aromatics and their derivatives. Taking benzene, naphthalene and phenanthrene as representative substances, n-hexane as solvent, the photon absorbing intensity of the substances is measured at 5 characteristic wavelengths. The results show the detection limit of 12.9×10^-9-20.5×10^-9, accuracy of standard-addition in blank 98.9%-101.4% and precision 3.73%-4.51%, and the standard recovery analysis of practical samples basically meets the requirements. The analysis testing method is optimized, with low pollution to environment, low toxicity to human body and high safety, which both reduces cost and improves efficiency. The method is simple and feasible, with high accuracy and precision, and can meet the requirements for analysis and testing of geological industry, suitable for mass analysis testing of aromatics in oil-gas geochemical samples.