用已知数均分子量的多个多分散标样校准尺寸排除色谱柱

摘要/Abstract

摘要： Hamielec双因子觅数法曾广泛应用于多分散标样校准尺寸排除色谱(SEC)柱.其后,有人将它改进为单因子觅数法,他们一般只使用了一个已知两种标定量(_n和_w或_η)的样品.在已知某一种标定量的多个多分散试样的校准工作中,有的为前述方法在非线性校准上的扩展,仍采用试凑法逼近目标函数;Szewczyk则利用与标定量对应的平均保留体积的概念,提出了一种较为有效的方法.

关键词: 尺寸排除色谱, 校准, 多分散标样, 数均分子量

Abstract: For the lincar calibration of the monodisperse polymer species using more than two polydisperse standards with known number-average MW, an effective and fast one-variableapproach is deseribed. The equation ln M = A-BV containing only one variable B can besolved by the Newton's iteractive method, and the value of A is determined. The SEC(size exclusion chromatography) data of the characterized polyurethane samples were cor-rected for the chromatographic spreading and then used to demonstrate this computationalprocedure. The deviations of the number-average MW caculated by SEC from the resultsby osmotic msthed are acceptable.

Key words: Size exclusion chromatography, Calibration, Polydisperse polymer standards, Number-average MW

何其坚, 蒙缔亚. 用已知数均分子量的多个多分散标样校准尺寸排除色谱柱[J]. 应用化学, 1989, 0(2): 56-59.

He Qijian, Meng Diya. CALIBRATION OF SEC COLUMN USNG MORE THAN TWO POLYDISPERSE POLYMER STANDARDS WITH KNOWN NUMBER-AVERAGE MW[J]. Chinese Journal of Applied Chemistry, 1989, 0(2): 56-59.

[1]	尹名东, 富彦珍, 李济根. 从特性粘数和GPC谱图获得数均分子量方法的误差分析[J]. 应用化学, 1992, 0(3): 58-62.
[2]	张卓勇, 朴哲秀, 曾宪津. ICP-AES分析的线性回归校准曲线[J]. 应用化学, 1991, 0(6): 10-13.

用已知数均分子量的多个多分散标样校准尺寸排除色谱柱

CALIBRATION OF SEC COLUMN USNG MORE THAN TWO POLYDISPERSE POLYMER STANDARDS WITH KNOWN NUMBER-AVERAGE MW

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 2

编辑推荐

Metrics

本文评价