世界核地质科学2024，Vol.41Issue(1)：73-81,9.DOI:10.3969/j.issn.1672-0636.2024.01.007
沉积岩中黄铁矿含量及其硫同位素组成连续测定方法研究
Study on the continuous determination of pyrite content and its sulfur isotope composition in sedimentary rock
摘要
Abstract
The study of pyrite content and its sulfur isotope composition in sedimentary rock can be used to judge the characteristics of sedimentary environment and reversely deduct the information of diagenesis and mineralization.A set of multi-channel pyrite sulfur extraction device were designed.The heating temperature of the device was determined to be 130℃,and the experiment time was 2 hours.Only one extraction experiment is needed to determine the sulfur content by methylene blue spectrophotometry and the sulfur isotope composition of pyrite by element analyzer gas isotope mass spectrometry.The R2 of the standard curve of methylene blue spectrophotometry was 0.999 9,the recovery rate of pyrite sample was 94%～100%,and the relative standard deviation of 10 measurements was 1.9%.The test results of the sulfur isotope composition of silver sulfide transformed from pyrite through chromium reduction extraction were consistent with the test results of original pyrite within the error range,and the accuracy was less than 0.2 ‰,which can meet the sulfur isotope test requirements of pyrite sulfur in sedimentary rock.关键词
沉积岩/黄铁矿含量/硫同位素组成/亚甲基蓝分光光度法/元素分析仪-气体同位素质谱法Key words
sedimentary rock/pyrite content/sulfur isotope composition/methylene blue spectrophotometry/EA-IRMS分类
化学化工引用本文复制引用
韩娟,刘汉彬,金贵善,张建锋,石晓,李军杰,张佳,刘小桐..沉积岩中黄铁矿含量及其硫同位素组成连续测定方法研究[J].世界核地质科学,2024,41(1):73-81,9.基金项目
受核能开发项目(编号:测HTLM2101-06)资助 Supported by Nuclear Power Development Project(No.测HTLM2101-06) （编号:测HTLM2101-06）
