Study of the effect of temperature on thermophysical properties of ethyl myristate by dual-beam thermal lens technique

Mohebbifar, M.R.

doi:10.1016/j.ijleo.2021.168000

Cited by 6 publications

(2 citation statements)

References 40 publications

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“…The choice of operating parameters of the built setups is based on an analysis of the literature over the past decades and, in general, considers the main parameters used for dual-beam thermal-lens spectrometry (examples of mainly used thermal-lens spectrometers are given in the Supplementary Materials, Table S2 ). These are most commonly used configurations in thermal-lens measurements in applied chemistry and thermophysical measurements [ 3 , 4 , 5 , 6 , 61 , 65 ]. The spectrometers are built in three configurations ( Figure 1 and Figure 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…In the practice of thermal-lens measurements, the issues of trueness are given less attention, and the available results are non-systemic [ 63 , 64 ]. In applied research, the main emphasis is on the precision of the results, improperly considering this as the only factor that governs the accuracy [ 50 , 53 , 65 ]. Some aspects of the trueness of thermal-lens measurements are considered in the context of optimizing methods for a particular analyte (and, as a rule, only in relation to the signal amplitude), within which an original setup is designed, and its operation parameters are optimized [ 66 , 67 ].…”

Section: Introductionmentioning

confidence: 99%

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Accuracy of Measurements of Thermophysical Parameters by Dual-Beam Thermal-Lens Spectrometry

2023

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Thermal-lens spectrometry is a sensitive technique for determination of physicochemical properties and thermophysical parameters of various materials including heterogeneous systems and nanoparticles. In this paper, we consider the issues of the correctness (trueness) of measurements of the characteristic time of the thermal-lens effect and, thus, of the thermal diffusivity determined by dual-beam mode-mismatching thermal lensing. As sources of systematic errors, major factors—radiation sources, sample-cell and detector parameters, and general measurement parameters—are considered using several configurations of the thermal-lens setups, and their contributions are quantified or estimated. Furthermore, with aqueous ferroin and Sudan I in ethanol as inert colorants, the effects of the intermolecular distance of the absorbing substance on the correctness of finding the thermophysical parameters are considered. The recommendations for checking the operation of the thermal-lens setup to ensure the maximum accuracy are given. The results obtained help reducing the impact of each investigated factor on the value of systematic error and correctly measure the thermophysical parameters using thermal-lens spectrometry.

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