摘要
在采用气相色谱法对混合气体进行分析时,由于混合组分的色谱峰存在重叠情况,造成定量计算的困难和误差。为此,利用色谱重叠峰相似性原理,建立重叠峰分峰模型;采用求切线交点的方法,解决求取重叠峰中单峰顶点;提出交点垂线法和比例分配法,提高峰面积计算精度。针对采用高斯函数叠加而成的重叠峰,分别用常规方法和所提的2种方法进行了对比计算。常规方法的计算误差最大达到28%,而所提方法的计算误差小于5%,并仍然保持处理速度快、实时在线的特点。
It makes computation difficult and error with the gas chromatograph method to analyze the products contents,because of the overlapped chromatogram in mixed gas.Aiming at addressing the problem,the similarity principle of overlapping chromatographic peaks is utilized to build up the separation model of overlapped peak.The tangent intersection method is used to obtain the peak vertex of overlapping peaks.The intersection vertical and proportional distribution method is proposed to improve the calculation accuracy of peak area.When the overlapping peaks superimposed by Gaussian function are processed,the calculation accuracy of the proposed method is compared with that of the conventional method.The results show that the maximum calculation error of the conventional method can reach up to 28%,but the proposed method can keep errors within 5% and also possess the features of fast response speed and real-time realization.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2015年第2期439-445,共7页
Chinese Journal of Scientific Instrument
关键词
色谱重叠峰
交点垂线法
比例分配法
高斯函数
overlapping chromatographic peaks
intersection vertical
proportional distribution
Gaussian function
