Floyd (2019) identified a small molecular weight organic molecule that has double peaks when methylated with trimethylsulfonium hydroxide (TMSH) using thermal desorption GC-MS. My goal is to assess the presence of the biomarker in modern and ancient planetary analog rock samples. Additionally, work will be done to determine the detectability with MTBSTFA, the TMSH limit of detection (LOD) and limit of quantitation (LOQ) to provide guidance for future spaceflight instruments.