Chemical Element Concentrations in Liepāja Lake (Latvia) Sediments, August 2024

This dataset presents chemical element concentrations in sediments collected from Liepāja Lake (Latvia) during August 2024. Sediment samples were taken from multiple locations (northern, central, and southern lake zones) to assess spatial variation in elemental composition and potential accumulation areas. Samples were analyzed for trace and heavy metals using an Inductively Coupled Plasma Mass Spectrometer (Agilent 8900 ICP-QQQ) equipped with a Micro-mist nebulizer and a helium collision/reaction cell. Calibration was performed with certified standards traceable to NIST, and measurement quality was verified through internal standards, procedural blanks, duplicates, and certified reference materials (CRMs). Concentrations are reported in micrograms per gram (µg/g) dry weight, with accompanying analytical precision (standard deviation, SD). The dataset provides a spatially detailed overview of metal accumulation in lake sediments, supporting the differentiation between natural geochemical background and anthropogenic inputs from urban, industrial, and diffuse pollution sources.