Palm kernel oil was extracted using n-hexane. Rotary evaporator and oven were used to remove n-hexane from the oil. Measurement of n-hexane in low concentration is significant and interest subject. In this study, the concentration of n-hexane was measured using the surface plasmon resonance technique. In order to improve the sensitivity of surface plasmon resonance sensor, the polypyrrole nanoparticles decorated reduced graphene oxide (sensing layer) was prepared using the electrodeposition technique on the surface of gold film. Different concentration of n-hexane in isooctane and the palm kernel oil before and after purification was tested using sensing layer. The sensor limit was about 1 ppm. The results were matched with the gas chromatography results. The thickness and roughness of sensing layer were increased after the interaction with n-hexane which was obtained from atomic force microscopy.

中文翻译：

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表面等离子体共振传感器，使用聚吡咯纳米颗粒还原的氧化石墨烯层检测棕榈仁油中的正己烷

棕榈仁油用正己烷萃取。使用旋转蒸发仪和烘箱从油中除去正己烷。低浓度正己烷的测量是重要的并且引起关注。在这项研究中，使用表面等离子体共振技术测量了正己烷的浓度。为了提高表面等离子体激元共振传感器的灵敏度，采用电沉积技术在金膜表面制备了装饰有还原氧化石墨烯（感测层）的聚吡咯纳米颗粒。使用感测层测试纯化前后异辛烷和棕榈仁油中异己烷的浓度。传感器极限约为1 ppm。结果与气相色谱结果相符。