Total metal, carbon, anion, iron speciation, and sulfide concentrations; Slate River, East River, and Trail Creek surface water and floodplains, Crested Butte, CO; May 2023–August 2023

This data package comprises analytical results and metadata from stream and groundwater samples collected from the Slate River, East River, Trail Creek, and their respective floodplains. This dataset contains five files: (1) a samples file (2023_SFA_Field_samples.csv) that contains site information; (2) a chemical analysis data file (2023_FieldWaterSampleData_IC__ICPOES__ICPMS__TOC__Fe__S_chem_data.csv) that contains sample analysis values; (3) a file-level metadata file (flmd.csv) that lists each file contained in the dataset with associated metadata; (4) a data dictionary file (dd.csv) that contains column/row headers used throughout the files along with definitions, units, and data types; and (5) a methods file (methods.csv) that contains ID, type, description, instrument, and lab information for each method. The samples’ anion concentrations were measured using ion chromatography (IC), total metal concentrations using inductively coupled plasma emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS), non-purgeable organic carbon using total organic carbon (TOC) analysis, dissolved sulfide concentration using methylene blue spectrophotometry, and iron speciation using the ferrozine assay. To support bulk chemical analyses and colloid characterization, samples were collected from multiple depths ranging from the surface to 3.5 meters below ground. Update on 2024-10-18: Updates were made to the 2023_FieldWaterSampleData_IC__ICPOES__ICPMS__TOC__Fe__S_chem_data.csv and dd.csv files to correct units (ppb instead of ppm).本数据包包含从板溪河（Slate River）、东河（East River）、特雷尔溪（Trail Creek）及其各自河漫滩采集的溪流与地下水样品的分析结果与元数据。本数据集共包含5个文件：(1) 样品文件（2023_SFA_Field_samples.csv），内含点位信息；(2) 化学分析数据文件（2023_FieldWaterSampleData_IC__ICPOES__ICPMS__TOC__Fe__S_chem_data.csv），存储样品分析数值；(3) 文件级元数据文件（flmd.csv），列出数据集内各文件及其关联元数据；(4) 数据字典文件（dd.csv），涵盖所有文件中使用的列/行表头及其定义、单位与数据类型；(5) 方法文件（methods.csv），包含各分析方法的编号、类型、描述、仪器与实验室信息。本次样品的阴离子浓度采用离子色谱法（ion chromatography, IC）测定；总金属浓度采用电感耦合等离子体发射光谱法（inductively coupled plasma emission spectrometry, ICP-OES）与电感耦合等离子体质谱法（inductively coupled plasma mass spectrometry, ICP-MS）测定；不可吹扫有机碳采用总有机碳分析法（total organic carbon, TOC）测定；溶解态硫化物浓度采用亚甲基蓝分光光度法测定；铁形态采用铁嗪测定法（ferrozine assay）测定。为支持批量化学分析与胶体表征，本次采样从地表至地下3.5米的多个深度采集样品。2024年10月18日更新：对2023_FieldWaterSampleData_IC__ICPOES__ICPMS__TOC__Fe__S_chem_data.csv与dd.csv文件进行了更新，以修正单位（将ppm更正为ppb）。