硫是自然界广泛分布的一种元素，其同位素组成特征对成岩成矿过程、生物地球化学过程、古海洋演化过程等方面有重要指示作用。传统的硫同位素分析手段在分析效率、应用范围等方面存在较多限制。与传统分析手段相比，多接收等离子质谱（MC-ICP-MS）分析技术在硫同位素分析测试上表现出更大的应用潜力，但目前对基体效应认识的不足严重制约了MC-ICP-MS硫同位素分析技术的发展。本研究拟通过对MC-ICP-MS硫同位素测试进行系统的基体效应研究，从仪器分析条件的差异、分析对象基体的差异等方面入手，探索基体效应的内在规律，提出消除基体效应影响的解决方案，最终建立适用于各类含硫地质样品的MC-ICP-MS硫同位素高精度分析测试技术。

Sulfur is widely distributed in nature and variations in sulfur isotopic compositions act as useful tracers of the diagenetic and mineralization processes, biogeochemical processes as well as the evolution of paleo-ocean. The traditional techniques for sulfur isotopic determination have many disadvantages including limited analysis efficiency and application ranges. Compared with them, multi-collector inductively coupled plasma mass spectrometry （MC-ICP-MS） technique shows more application potential for sulfur isotopic determination. However, our limited understanding of the effects of matrix for sulfur isotopic determination greatly limits the current application of solution and laser ablation MC-ICP-MS. In this study, we intend to investigate the matrix effects during sulfur isotopic determination by applying different analysis conditions to measure different samples that vary in matrix. And a new solution to eliminate matrix effects will be proposed. In the end, a MC-ICP-MS technique that is applicable to various sulfur bearing geological samples will be established.