%0 Journal Article
%T A Further Comparison of Real Peak Numbers(RPN)withOther Parameters of Gas Chromatographic(GC) Column Efficiency<br>真实峰数及气相色谱的其它柱效参数
%A Li Shijiao
%A He Dasen
%A Dai Xiaosheng
%A <br>李似姣
%A 何大森
%A 戴晓声
%J 色谱
%D 1994
%I 
%X ased on the linear relationship between GC peak width at half height( W_n ) and retention time(t_r),afurther comparison of RPN with other parameters of GC column efficiency was made, The column hold-uptime(t_0 ) and linear constants(intercept a and slope b)obtained from the relationship between W_n and t_r arevery improtant information related to column efficiency. All of the parameters of column efficiency discussedhere except N_inf are the function of a, b and t_0.N_inf is a limit of theoretical plate numbers at infinite capacity and is related only to the slope b. Therefore,N_inf is not a good paranleter fOr expressing the column efficien-cy at finite capacity region. With increasing the column temperature, the effective plate number(N_eff)for different capacity ratio(k')exhibited different variation trend.In other words,N_eff possesses an uncertain-ty due to its dependence of k'.The soparate number, TZ_(10), is independent of k'and possesses a definite-meaning correlated to column efficiency. However,its model for peak broadening is simplified.RPN is al-most the same as TZ_(10) but without any simplified treatment. In this point,RPN should be more perfect than TZ_(10) when they are used for comparison of the column efficiency of different columns or at different operating conditions.Different homologous series wereused as the reference series to measure TZ_(10) and RPN. Only small difference between the values(TZ_(10) or RPN)obtained from different homologous series was observed.
%K gas chromatography
%K column efficiency
%K real peak numbers
%K resolution
%K normal alkane<br>气相色谱
%K 柱效
%K 真实峰数
%K 分离度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=0A44D7FEB85F8FDEE42E22FD5A885A2E&yid=3EBE383EEA0A6494&vid=59906B3B2830C2C5&iid=0B39A22176CE99FB&sid=9C65ADEB5990B252&eid=0D0D661F0B316AD5&journal_id=1000-8713&journal_name=色谱&referenced_num=0&reference_num=3