کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1244886 | 969707 | 2009 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of light-absorbing layers at inner capillary surface by cw excitation crossed-beam thermal-lens spectrometry
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Determination of light-absorbing layers at inner capillary surface by cw excitation crossed-beam thermal-lens spectrometry Determination of light-absorbing layers at inner capillary surface by cw excitation crossed-beam thermal-lens spectrometry](/preview/png/1244886.png)
چکیده انگلیسی
A thermal-lens spectrometric unit suitable for selective quantitative measurements of light-absorbing layers adsorbed onto the inner surface of a quartz glass capillary is described. The quantitative description of the thermal-lens signal generated in a quartz glass capillary with a light-absorbing layer at the inner surface of capillary is developed, which is based on the description for the thermal-lens experiment in the layered solids presented elsewhere. The accuracy of calculations is demonstrated by the comparison of predicted results with the experimental data and those predicted by the conventional theory. The data achieved prove the accuracy of calculations both for the time dependent thermal-lens signal and for the lock-in amplifier signal under variation of the spectrometer configuration for capillaries having an adsorbed layer. The proposed technique is used for the investigation of chromate/2,10-ionene and 4-aminoazobenzene adsorption at capillary walls. The estimates of the minimum light absorption detectable at capillary walls are at a level of 1Â ÃÂ 10â5 abs. units; the linear range of the thermal-lens signal from the inner surface layer no less than three orders of magnitude is predicted.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 78, Issue 3, 15 May 2009, Pages 682-690
Journal: Talanta - Volume 78, Issue 3, 15 May 2009, Pages 682-690
نویسندگان
D.A. Nedosekin, W. Faubel, M.A. Proskurnin, U. Pyell,