کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7607638 | 1493362 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adaption of a parallel-path poly(tetrafluoroethylene) nebulizer to an evaporative light scattering detector: Optimization and application to studies of poly(dimethylsiloxane) oligomers as a model polymer
ترجمه فارسی عنوان
تصویب یک پالپ (تترافروتورو اتیلن) نبولایزر موازی به یک آشکارساز پراکندگی نور تبخیری: بهینه سازی و کاربرد در مطالعات الیگومرهای پلی (دمیتی سیلوکسان) به عنوان پلیمر مدل
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کلمات کلیدی
PDMSevaporative light scattering detector (ELSD)ELSDACNTHFSECPTFEEvaporative Light Scattering Detector - آشکارساز پراکندگی نور تبخیریAcetonitrile - استونیتریلTetrahydrofuran - تتراهیدروفورانMethanol - متانولMeOH - مونdetector response - پاسخ تشخیص دهندهPoly(tetrafluoroethylene) - پلی (تترا فلوئور اتیلن)poly(dimethylsiloxane) - پلی (دی متیل سیلوکسان)Poly(dimethylsiloxane) (PDMS) - پلی (دی متیل سیلوکسان) (PDMS)Size exclusion chromatography - کروماتوگرافی اندازهای طردی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
The adaption of an parallel-path poly(tetrafluoroethylene)(PTFE) ICP-nebulizer to an evaporative light scattering detector (ELSD) was realized. This was done by substituting the originally installed concentric glass nebulizer of the ELSD. The performance of both nebulizers was compared regarding nebulizer temperature, evaporator temperature, flow rate of nebulizing gas and flow rate of mobile phase of different solvents using caffeine and poly(dimethylsiloxane) (PDMS) as analytes. Both nebulizers showed similar performances but for the parallel-path PTFE nebulizer the performance was considerably better at low LC flow rates and the nebulizer lifetime was substantially increased. In general, for both nebulizers the highest sensitivity was obtained by applying the lowest possible evaporator temperature in combination with the highest possible nebulizer temperature at preferably low gas flow rates. Besides the optimization of detector parameters, response factors for various PDMS oligomers were determined and the dependency of the detector signal on molar mass of the analytes was studied. The significant improvement regarding long-term stability made the modified ELSD much more robust and saved time and money by reducing the maintenance efforts. Thus, especially in polymer HPLC, associated with a complex matrix situation, the PTFE-based parallel-path nebulizer exhibits attractive characteristics for analytical studies of polymers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1564, 24 August 2018, Pages 214-223
Journal: Journal of Chromatography A - Volume 1564, 24 August 2018, Pages 214-223
نویسندگان
Bernhard Durner, Thomas Ehmann, Frank-Michael Matysik,