色谱峰拐点和底宽的经验表示式  

Empirical Expressions for the Chromatographic Peak Width at Inflection Points and Base

作　　者：史文娟[1] 苏红伟[1] 吴宁生[1] 

机构地区：[1]中国科学技术大学化学系

出　　处：《色谱》1997年第4期314-315,共2页Chinese Journal of Chromatography

摘　　要：根据ＥＭＧ函数和线性回归，给出了色谱峰两拐点与峰顶在横轴上投影距离的表示式，给出了底宽和半高峰宽或１／１０峰高处峰宽之间关系的表示式，在不对称度为１．０９～３．００范围内，相关系数均在０．９９８以上。From EMG function and linear regression, the projective distances on abscissa between inflection points in the left side(T L ) or in the right side(T R ) and the apex of a chromatographic peak which the asymmetry at 0.1 height fraction is within 1.09 3.00 can be expressed as:T L =-0.789 8+0.821 9 W 0.1, L T R =0.035 36+0.458 2 W 0.1, L where W 0.1, L  is the projective distance on abscissa between the point at 1/10 height fraction in the left side and the apex. The correlation coefficients are all over 0.998 and the relative error limits are within -0.65% 0.40% and -0.39% 0.67%, respectively. The relationship between the peak width at base W b  and the peak width at half height W 0.5  or the peak width at 1/10 height fraction W 0.1  can be expressed as:W b =0.048 27+1.690 7 W 0.5 W b =1.906 6+0.530 0 W 0.1 The correlation coefficients are all over 0.999 and the relative error limits are within -0.54% 0.69% and -1.05% 1.40%, respectively.

关 键 词：EMG函数 拐点 底宽 色谱峰 

分 类 号：O657.7[理学—分析化学]