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• W4386727606 abstract "Abstract The intensity ratio ( α I ) and area ratio ( α A ) obtained using Raman spectroscopy are used widely to characterize the physical properties of gases, fluids, and solids, but the underlying parameters which affect their precision ( and ) have not been elucidated. We use simulations, experiments, and theoretical analyses to investigate the effects of instrumental performance, analytical conditions, and sample size on and . We identified the parameters which strongly influence : (1) the weaker peak intensity I w ; (2) the ratio of the bandwidth to pixel resolution of the weaker peak Γ w /Δ x w ; (3) the degree of detector saturation; (4) with readout noise σ R , dark noise σ D , and shot noise σ S ; (5) drift; and (6) sample size. Theoretical and simulation results show that, when Γ w /Δ x w ≪ ( Γ s /Δ x s )/ α I , increasing I w or Γ w /Δ x w by n times can improve by a factor of . Results showed that is a measure of how much the achievable in the experiment differs from that under ideal analytical conditions (i.e., ). When is not the case (i.e., when I w is low), reducing σ D or σ R by decreasing the readout speed, setting a lower charge coupled device (CCD) sensitivity, reducing number of readouts, or narrowing vertical binning width can improve . We demonstrated that evaluations of or based on small sample sizes can engender physically unattainable precision. When the sample size is n = 5, 10, or 20, the average uncertainties of and correspond, respectively, to approximately 30%, 20%, and 15%. Giving an accurate and comparable assessment for and necessitates the reporting of intensity (in units of electrons), bandwidth, Δ x , and the sample size." @default.
• W4386727606 created "2023-09-15" @default.
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• W4386727606 date "2023-09-14" @default.
• W4386727606 modified "2023-10-15" @default.
• W4386727606 title "Unlocking ultimate precision of intensity and area ratio measurements in Raman spectroscopy: Insights from simulation, experimentation, and theory and implications for isotope ratio analysis" @default.
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• W4386727606 doi "https://doi.org/10.1002/jrs.6594" @default.
• W4386727606 hasPublicationYear "2023" @default.
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