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In Situ Measurement of Polymer Layer Thickness in Porous Layer Open Tubular (PLOT) Columns Using Optical Absorbance in the Near-IR Range

التفاصيل البيبلوغرافية
العنوان: In Situ Measurement of Polymer Layer Thickness in Porous Layer Open Tubular (PLOT) Columns Using Optical Absorbance in the Near-IR Range
المؤلفون: David Collins, Ekaterina Nesterenko, Brett Paull
المصدر: Separations, Vol 3, Iss 4, p 34 (2016)
بيانات النشر: MDPI AG, 2016.
سنة النشر: 2016
المجموعة: LCC:Physics
LCC:Chemistry
مصطلحات موضوعية: PLOT columns, polymerisation, in-process layer thickness measurement, Physics, QC1-999, Chemistry, QD1-999
الوصف: Highly reproducible fabrication of porous layer open tubular (PLOT) structures in fused silica capillaries is often challenging; thus, methods to measure layer thickness growth in real time represent a powerful tool for the production of such columns. The work presented herein demonstrates the application of optical absorbance in the near-infrared (near IR) range for the in-process measurement of polymer layer growth inside fused silica capillaries during the fabrication of PLOT columns. The proposed technique can be used for both on- and off-line measurements of layer thickness for thermal- and photo- initiated polymerisation methods, performed in either polytetrafluoroethylene (PTFE)- or polyimide-coated capillaries. Measurements of layer thickness were carried out at λ 700 nm, using 100 μm and 8 μm optical fibres, yielding relative standard deviation (%RSD) values of 27% and 22%, respectively.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2297-8739
Relation: http://www.mdpi.com/2297-8739/3/4/34; https://doaj.org/toc/2297-8739
DOI: 10.3390/separations3040034
URL الوصول: https://doaj.org/article/e8865a0587e54181ac8527c2932d95c7
رقم الأكسشن: edsdoj.8865a0587e54181ac8527c2932d95c7
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:22978739
DOI:10.3390/separations3040034