HH-SJSW-III 微量硫化物的测量专用柱

化肥生产过程中,痕量硫化物的在线监测是净化脱硫工段的重要控制指标之一,正常工况下痕量硫化物的体积分数低于0.1μL/L,有较强吸附性和腐蚀性。传统的在线分析方法主要是采用醋酸铅纸带法,与醋酸铅纸带法比较,色谱FPD法不仅能够多点多组分分析,而且具有检测灵敏度高,选择性、重复性、稳定性好,维护量少、运行费用低的优点。

化肥生产净化脱硫工段出口,工艺气中硫化物的体积分数控制在0.1μL/L之内,超标会导致催化剂中毒失效,破坏化学反应的正常进行。净化脱硫工段出口的合成气中,硫化物以H₂S和COS气态形式存在,硫化物的检测就是分别对H2S和COS气体体积分数的检测。

浩瀚色谱（山东）应用技术开发有限公司采用冷阱预浓缩-气相色谱/质谱联用法测定环境空气中硫化氢、甲硫醇、甲硫醚、二硫化碳、二甲二硫、噻吩等6种硫化物,讨论了采样容器材质的影响。方法线性良好,6种硫化物的检出限为1.0μg/m3～5.0μg/m3,混合标准气平行测定的RSD≤8.1%,加标回收率为93.5%～97.3%。

微量硫化物的测量专用柱  测试谱图：



Special column for the measurement of trace sulfide
Special column for the measurement of trace sulfide Details:

In the process of fertilizer production, online monitoring of trace sulfide is one of the important control indicators in the purification and desulfurization section. The volume fraction of trace sulfide under normal working conditions is less than 0.1μL/L, which has strong adsorption and corrosiveness. The traditional online analysis method mainly uses the lead acetate paper tape method. Compared with the lead acetate paper tape method, the chromatographic FPD method not only can analyze multiple points and multiple components, but also has high detection sensitivity, selectivity, repeatability, good stability, and maintenance. The advantages of less and low operating costs.

At the exit of the purification and desulfurization section of chemical fertilizer production, the volume fraction of sulfide in the process gas is controlled within 0.1μL/L. Exceeding the standard will lead to catalyst poisoning and failure and disrupt the normal progress of chemical reactions. In the synthesis gas at the outlet of the purification desulfurization section, sulfide exists in the form of H2S and COS gas. The detection of sulfide is the detection of the volume fraction of H2S and COS respectively.

Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. uses cold trap pre-concentration-gas chromatography/mass spectrometry to determine six sulfur compounds in ambient air, including hydrogen sulfide, methyl mercaptan, methyl sulfide, carbon disulfide, dimethyl disulfide, and thiophene. , Discuss the influence of the material of the sampling container. The method has a good linearity. The detection limits of the six sulfides are 1.0μg/m3～5.0μg/m3, the RSD of the mixed standard gas parallel determination is less than 8.1%, and the recovery rate of standard addition is 93.5%～97.3%.

Special column for the measurement of trace sulfide Test spectrum: