碳测定拖尾是LecoCS 344碳硫测定仪的常见问题。气路堵塞、燃烧功率降低、检测系统灵敏度下降、信号传输错误、坩埚空白高、载气纯度低等原因都可能造成拖尾。本文讨论了碳测定拖尾的影响因素及产生原因 ,结合作者在解决拖尾问题过程中积累的经验 ,对不同表现形式的拖尾提出了不同解决方法 Carbon measurement tailing is a common problem with the LecoCS 344 carbon-sulfur analyzer. Blocking of air lines, reduction of combustion power, decrease of sensitivity of the detection system, signal transmission errors, high crucible blank, low carrier gas purity and the like may cause tailing. In this paper, we discuss the influencing factors and the reasons for the tailing of carbon measurement. Combining with the accumulated experience of the authors in solving the tailing problem, we propose different solutions to the tailing of different manifestations