Harvey Lake Loss on Iginition

Complete dataset for Harvey Lake sediment samples analyzed using Loss on ignition after Heiri et al., 2001. LOI was performed after X-ray fluorescence core scanning (XRF-CS) of sediment. Sediment was removed from sample holders after XRF-CS, placed into pre-weighed crucibles, weighed, dried for 24 hours at 110 degrees Celsius, weighed, combusted and 550 degrees Celsius, then weighed a final time. Percent water was considered the difference between sediment before and after drying divided by the wet weight of sediment; percent organic was considered the difference in weight before and after combustion divided by the total dry weight of sediment. Five samples (represented by NA) do not have Organic % as crucibles tipped over during handling and thus were excluded due to the possibility that some material was lost.本数据集完整收录了参照Heiri等人2001年的方法，采用烧失量（Loss on ignition，LOI）分析的哈维湖沉积物样品数据。实验先对沉积物开展X射线荧光岩芯扫描（X-ray fluorescence core scanning, XRF-CS），随后进行烧失量分析：将XRF-CS后的沉积物从样品架中取出，放入预先称重的坩埚，先称量初始重量，再置于110℃下烘干24小时后再次称重，接着在550℃条件下灼烧，最后完成末次称量。其中，含水率以烘干前后沉积物的重量差除以湿沉积物总重量计算得出；有机质百分含量以灼烧前后的重量差除以沉积物总干重计算得到。另有5个以NA标记的样品未测得有机质百分含量，因实验操作过程中坩埚倾覆，存在样品流失风险，故将其剔除。