Field Portable X-ray Fluorescence Spectrometer (FPXRF) is a time efficient analytical tool for field-based research and investigation. FPXRF can be helpful, for example, when sampling for sulphide soil. Identifying sulphide soil in the environment is important due to its attributes and the environmental consequences sulphide soil can give rise to. The study aimed to evaluate the use of FPXRF for identifying sulphide soil in field work. It compared different sample preparation methods, measurement times as well as the influence of water content and organic matter. A total of 23 soil samples were analyzed using FPXRF with different preparation methods and measurement times. The results showed that FPXRF tended to overestimate or underestimate sulphur content compared to ICP analysis at different concentrations. Significant differences were observed between sulphur content and water content, as well as sulphur content and organic matter. Different measurement times also resulted in varied distributions of sulphur content. The study concluded that all tested sample preparation methods can be used to identify sulphide soil without environmental consequences. The study also concluded that when using plastic bags, FPXRF must be calibrated with respect to the plastic bag to avoid an analysis result being affected to a lower one. However, the study did not provide a clear answer on the effects of soil moisture and organic matter on FPXRF analysis due to errors during the analysis process. Furthermore, the study concluded that the measurement time for FPXRF analysis should be less than 120 seconds and allow a detection limit below 600 mg/kg.