2026-10-14T20:17:20Z https://www.scidb.cn/oai

10.57760/sciencedb.40302 2026-06-16T16:09:53Z

2026-06-16 Carbon and Nitrogen Stable Isotope Test Results of Carbonized Plant Remains from the Qingqiu Site doi:10.57760/sciencedb.40302 en The carbonized plant remains in this dataset were all collected from the 2018 excavation of the Qingqiu site in Heze. They were primarily unearthed from archaeological features dating to the Longshan period, Shang，Zhou, and Han dynasties at the site. A total of 91 samples were collected, including 63 millet samples and 28 wheat samples.The carbonized remains underwent a pretreatment process. Plant remains were observed under a microscope, and impurities were manually removed. They were then ultrasonically cleaned with deionized water to remove stubborn adhering contaminants. The samples were dried at 50°C for 48 hours and subsequently ground to homogeneity using an agate mortar.Carbon and nitrogen stable isotope analysis was performed using an isotope ratio mass spectrometer. The testing equipment consisted of a Flash 200 HT elemental analyzer (EA) and a Delta V Advantage isotope ratio mass spectrometer (IRMS), both manufactured by Thermo Fisher Scientific. Carbon and Nitrogen stable isotope; Carbonized plant remains; Longshan Period; Shang-Zhou dynasty; Han dynasty bi xiao guang Chen Xuexiang Sun Shimei Dong Yu PUBLIC https://creativecommons.org/publicdomain/zero/1.0/ dataset http://www.doi.org/10.11928/j.issn.1001-7410.2026.03.11. Science Data Bank