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顶空-气质联用法测定聚醋酸乙烯酯树脂中残存醋酸乙烯酯单体的含量

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摘要 建立了一种顶空—气质联用测定聚醋酸乙烯酯(PVAc)树脂中残存醋酸乙烯酯(VAc)含量的测定方法。将PVAc和带一定量丙酸乙烯酯内标的N,N-二甲基乙酰胺(DMA)溶剂放入顶空瓶中密封加热,待顶空瓶内气液两相平衡后,取其上部气体进样,质谱SIM扫描结合内标标准曲线法定量,来测定PVAc中残存单体的含量。该分析方法结果的加标回收率在94.70%~103.2%,相对标准偏差为0.54%。方法曲线线性好,操作简单,结果的准确度和精密度均可满足日常定量分析要求。
作者 申能美
出处 《安徽科技》 2020年第11期47-49,共3页 Anhui Science & Technology
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