交叉光束热透镜技术研究铀的光稳定性

Laser Chemistry Pub Date : 2007-02-27 DOI:10.1063/1.2711116
M. Z. el-din, K. Elsayed, M. Harith
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引用次数: 0

摘要

在眼科中,铀是一种诊断试剂,可用作免疫组织学染色剂。利用交叉光束热透镜(TL)技术对这一重要化合物进行了光稳定性研究。该研究基于入射激光功率、波长、调制频率和样品浓度等参数对光降解(PD)行为和速率的影响。详细讨论了这些参数对TL信号和PD率的影响。PD的速率与抽运激光的功率和在所研究范围内样品的浓度成正比。发现调制频率不影响PD率。用草酸铁钾光光度法测定了光化学量子产率,发现它很低。
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Photostability of Uranine via Crossed-Beam Thermal Lens Technique
Uranine is a diagnostic aid in ophthalmology and used as immuno‐histological stain. Photostability study on such important compound using crossed‐beam thermal lens (TL) technique was carried out. The study is based on the photodegradation (PD) behavior and rate regarding some parameters such as the incident laser power, wavelength, modulation frequency and sample concentration. The effects of such parameters on the TL signal and PD rate are discussed in details. The rate of PD is found to be proportional to the power of the pumping laser and concentration of the sample within the investigated range. The modulation frequency is found not to influence the PD rate. The photochemical quantum yield has been measured using potassium ferrioxalate actinometry and it was found to be very low.
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