The Thermo Scientific Delta V Plus is a high-performance Isotope Ratio Mass Spectrometer (IRMS) coupled with the GC Isolink system, designed for precise compound-specific isotope analysis (CSIA). This integrated system is primarily utilized for measuring carbon (¹³C/¹²C) and hydrogen (D/H) isotope ratios of specific organic compounds, such as lipid biomarkers and methane, within complex environmental or biological samples. It provides crucial insights into biogeochemical cycles, source apportionment, and metabolic pathways by analyzing the isotopic signatures of individual compounds. Technically, the Delta V Plus IRMS is a robust and versatile instrument capable of accommodating up to 10 collectors, allowing for the analysis of various isotope ratios across a mass range up to m/z 96. It boasts a high sensitivity of 1100 molecules per ion in Continuous Flow mode, which is the preferred operating condition for most applications. The system incorporates the ConFlo IV universal interface, enabling seamless coupling with diverse peripherals. The GC Isolink component employs both combustion and high-temperature pyrolysis techniques to convert organic compounds separated by gas chromatography into simple gases (e.g., CO₂, H₂, N₂) for subsequent isotopic analysis by the IRMS. This design ensures high reliability and robustness for demanding research. This instrument is widely applied in diverse research areas, including environmental science, biogeochemistry, ecology, forensics, food authenticity, and petroleum exploration. It is invaluable for tracking the origin and transformation of organic matter, reconstructing past environments, studying microbial processes, and identifying contaminants. The ability to perform compound-specific analysis offers a significant advantage over bulk isotope measurements, providing a more detailed understanding of complex systems and processes. Further enhancing its capabilities, the ConFlo IV interface allows for flexible integration with other Thermo Scientific peripherals such as elemental analyzers (EA IsoLink), liquid chromatography systems (LC IsoLink), and the GasBench II for gas and carbonate analysis. A PreCon trace gas pre-concentrator can also be connected for ultra-trace atmospheric gas research. The system is designed for full automation, ensuring high throughput and ease of operation, making it suitable for both routine analysis and advanced research applications.