【摘要】 废塑料裂解油中的硅元素作为典型的有害杂质，可对后续深加工工艺产生不利影响，需对废塑料裂解油中硅含量实施严格管控。有机直接进样-电感耦合等离子体发射光谱法（ICP-OES）作为测定废塑料裂解油中硅含量的常用分析技术，具有操作便捷、分析高效等优势，但样品中硅的化学形态对测定结果存在影响，其中易挥发性硅化合物可能导致检测结果严重偏高。文章使用废塑料裂解油中常见的硅烷和硅氧烷作为模型化合物，通过考察不同稀释溶剂、雾化器选型、制冷温度参数及雾化气流速等关键实验条件时模型化合物测定的回收率，探究硅化合物形态导致误差的影响因素，优化筛选得到最佳分析参数，建立了准确测定废塑料裂解油中硅含量的分析方法。经此优化后，测定不同硅烷和硅氧烷的相对误差小于10%，可有效提升检测结果的准确度，实现对废塑料裂解油中硅含量的准确测定，为后续工艺调控提供科学数据支撑。更多还原

【Abstract】 Silicon, a typical harmful impurity in waste plastic pyrolysis oil, can adversely affect subsequent deep processing. Therefore, strict control over silicon content in waste plastic pyrolysis oil is essential. Inductively Coupled Plasma Emission Spectrometry(ICP-OES), a widely used analytical technique for measuring silicon content in waste plastic pyrolysis oil, offers advantages such as convenient operation and high efficiency. However, the chemical form of silicon in samples can influence measurement results, with volatile silicon compounds potentially causing significant overestimation. Using silane and siloxane—common silicon compounds in waste plastic pyrolysis oil—as model compounds, this study investigated the recovery rates under key experimental conditions including different dilution solvents, nebulizers selection, spray chambers temperature parameters, and carrier gas flow rates. By optimizing these parameters, an accurate analytical method for determining silicon content in waste plastic pyrolysis oil was established. The optimized approach achieved relative errors below 10% for various silane and siloxane compounds, effectively improving measurement accuracy and providing scientific data support for subsequent process control.更多还原