天然气勘探与开发2025，Vol.48Issue(4)：107-115,9.DOI:10.12055/gaskk.issn.1673-3177.2025.04.011
天然气中元素硫溶解度的测量精密度分析
Precision analysis of elemental sulfur solubility measurement in natural gas
摘要
Abstract
To systematically investigate the precision of elemental sulfur solubility measurement in natural gas by saturated dissolution method,20 samples from the same batch underwent repeated testing across 12 domestic laboratories.A precision systematic analysis for elemental sulfur solubility was conducted in accordance with the ISO 4259-1 Precision of measurement methods and results—Part 1:Determination of precision data in relation to methods of test.Firstly,GESD method,Cochran and Hawkins method,and Cook distance were utilized for pre-screening,testing,and analyzing data outlier,respectively.Then,statistical models and automated data processing approaches were used for repeatability and reproducibility evaluations.Finally,the concentration-dependent precision characteristics were clarified through refined segmented concentration intervals.Results indicated that(1)all experimental data can pass the outlier test;(2)degrees of freedom of both repeatability and reproducibility meet the requirements of statistical analysis;and(3)under repeatability/reproducibility conditions,within a 95%confidence interval,the difference between two independent results obtained does not exceed the repeatability/reproducibility limit within the corresponding concentration range.The established precision analysis system can accurately evaluate the consistency and reliability of test data.The determination of repeatability and reproducibility limits provides critical technical support for developing the ISO standard Determination of elemental sulfur solubility by saturated dissolution method as well as the revision and improvement of current industry standards.关键词
天然气/元素硫溶解度/饱和溶解法/精密度研究体系/异常值检验/重复性/再现性/ISO标准Key words
Natural gas/Elemental sulfur solubility/Saturated dissolution method/Precision analysis/Outlier test/Repeatability/Reproducibility/ISO standard分类
能源科技引用本文复制引用
赵丹,王丽,万莹,尹庆,杨艳,唐志娟..天然气中元素硫溶解度的测量精密度分析[J].天然气勘探与开发,2025,48(4):107-115,9.基金项目
中国石油西南油气田公司科研项目"天然气饱和溶解法测定元素硫溶解度等三项国际标准研究"(编号:2024D110-02-01). （编号:2024D110-02-01）
