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Analysis of composition complicated binary mixture
by quantitative SEC |
| CHEN Zhengnian1, XIE Hongfeng2, YANG Hu2, WANG Zhiliu2, CHENG Rongshi3 |
| 1.Key Laboratory for Mesoscopic Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University; Department of Materials, Nanjing Technology of Institute; 2.Key Laboratory for Mesoscopic Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University; 3.Key Laboratory for Mesoscopic Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University; College of Material Science and Engineering, Polymer Institute, South China University of Technology; |
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Abstract The analyses of the composition of a binary mixture composed of two kinds of industrial complicated materials have great importance for formulation in practice. The present paper provides a quantitative size exclusion chromatography (SEC) method based on the principle of absolute quantification of SEC to solve the problem. The conventional data treatment procedure for the differential refractive index (DRI) signal of SEC H(V) is improved first by dividing it with the injected sample weight and leads to a novel defined weight normalized distribution Hw(V) and its integral Iw(V). These two distributions reflect the response constant of the sample in addition to the conventional normalized distribution F(V). The difference of the average response constants of the composing components provides a sensitive method to compute the composition of their mixture from its Hw(V) or Iw(V). The method was applied to mixtures of a kind of industrial asphalt and paraffin diluents as an example, and successful results are obtained.
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Issue Date: 05 September 2008
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doi:10.1016/0032‐3861(92)90394‐C
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