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[求助] GC-450测脱除乙硫醇气体

GC-450 气相色谱,PFPD 检测器,检测单一组分硫醇。随着催化剂的穿透,在2min出现一个峰且越来越高(H2S出峰在3分钟以后,另一个小峰是硫醇)。色谱柱用的沸点柱,求各位大神分析这可能是什么硫化物?比H2S还靠前,标定过羰基硫 SO2都不是。

GC-450测脱除乙硫醇气体
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