工业二甲基乙酰胺中微量水的测定气相色谱仪分析

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        二甲基乙酰胺(DMAc)是一种工业中广泛应用的极性有机溶剂。在芳香族聚酰亚胺和聚酰胺合成及纺丝中也用它为溶剂。DMAc中含水对缩聚反应有严重影响,即使是少量的水,也会促使链终止,降低聚合链的分子量,因此对DMAc中含水需要严格控制。 目前,测定化合物中微量含水的方法很多,常用的有卡尔弗休法,电解法和气相色谱法等。它们各有优缺点和局限性。

   滕州市浩瀚色谱仪器技术服务有限公司，与时俱进，以科学发展为指导，在王晓莹经理的带领下，依托翔鹰分析技术研究所，色谱工程研究所，分析与测试ZX3个科研单位，研发出二甲基乙酰胺中微量水的测定气相色谱仪分析，气相色谱法分析ＤＭＡＣ中微量水的新方法，和常用的传统方法相比，该方法简单、快速、准确，其相对标准偏差在５％以下，回收率为９６一１０１％，获得满意结果。

二甲基乙酰胺中微量水的测定气相色谱仪分析测定谱图：


Determination of trace water in dimethylacetamide by gas chromatograph
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        Dimethylacetamide (DMAc) is a widely used polar organic solvent in industry. It is also used as a solvent in the synthesis and spinning of aromatic polyimides and polyamides. The water content in DMAc has a serious effect on the polycondensation reaction. Even a small amount of water will cause the chain to terminate and reduce the molecular weight of the polymer chain. Therefore, the water in the DMAc needs to be strictly controlled. At present, there are many methods for determining the amount of water in the compounds. Commonly used are Calvie method, electrolysis and gas chromatography. They have advantages and disadvantages and limitations.

   Tengzhou City, the vast chromatographic equipment Technology Co., Ltd., advancing with the times to the scientific development as a guide, under the leadership of Wang Xiaoying manager, relying on Xiangying Analysis Technology Research Institute, chromatography engineering research, analysis and testing center 3 scientific research units, A new method for the determination of trace water in DMAC by Gas Chromatography was analyzed. The method was simple, rapid and accurate compared with the conventional method. The relative standard deviation was 5% or less, the recovery rate of 96 to 101%, to obtain satisfactory results.

Determination of trace water in dimethylacetamide Gas chromatograph analysis Spectrum: