N,N-二甲基羟胺的气相色谱分析

Analysis of N,N-dimethylhydroxylamine by gas chromatography

为核燃料后处理工艺研究建立了N，N-二甲基羟胺（DMHAN）的分析方法。对DMHAN采用FFAP毛细管柱气相色谱法分析时，在3．0×10^-4～2．5×10^-3mol／L范围内，峰面积与浓度具有良好的线性关系，其相关系数r=0．9992，分析方法的检测下限为3．0×10^-4mol／L，测量的相对标准偏差（RSD）〈1．0％。甲醇、甲醛、甲酸、硝酸、单甲基肼、乙醇、肼、甲胺在工艺可能存在的浓度范围内，对DMHAN的定量分析无显著影响。

The method for determination of N, N-dimethylhydro-xylamine （DMHAN） in water and nitric acid by capillary gas chromatography was studied in this paper. The test results showed that the linearity between the peak area and concentration was excellent in the range of 3.0×10^-4～2.5×10^-3 mol/L with a correlation coefficient of over 0.999. The relative standard deviation （RSD） was lower than 1.0%. The minimum detectable limit （MDL） of DMHAN was 3.0×10^-4 mol/L.The possible impurities （such as methanol, formaldehyde, methanoic acid, nitric acid, monomethyl hydrazine, ethanol, hydrazine, and methylamine） did not affect the quantitative determination of DMHAN by the analytical system.