Study on the origin of linear deviation with the Beer-Lambert law in absorption spectroscopy by measuring sulfur dioxide

Quantitative analysis of SO2, NO2 and NO mixed gases based on ultraviolet absorption spectrum

“…According to eqn (5), there is a linear relationship between the concentration of a specific gas and its absorbance, which is the theoretical basis for gas measurement based on the absorption spectroscopy method. 18 I ( λ ) = I ′ 0 ( λ ) × exp[− σ ( λ ) CL ]…”

“…The propagation of a monochromatic beam with wavelength λ in a specific gas is expressed by the Lambert-Beer law 2,10,17,18 as shown in eqn (1), where I 0 (λ) is the light intensity of the monochromatic beam with wavelength λ which isn't absorbed by the gas to be measured, I(λ) is the remaining light intensity after being absorbed by the gas, σ(λ) is the absorption cross-section of the gas to be measured at wavelength λ (cm 2 per molecule), L is the optical path of the beam propagating in the gas (cm) and C is the gas concentration (molecule per cm 3 ).…”

“…16,24 Paper Analyst and its absorbance, which is the theoretical basis for gas measurement based on the absorption spectroscopy method. 18 IðλÞ ¼ I′ 0 ðλÞ Â exp½ÀσðλÞCL ð 4Þ…”

Calibration model averaging in chemical analysis: a case study for the method of standard additions

“…Indeed, even the best detectors will display deviations from linear response at very low or very high concentrations which is encountered in UV-vis spectrophotometry. For example, Li et al reports deviations from the classical Beer-Lambert law between the 216 nm and 230 nm light absorbance (y) and the concentration of SO 2 (x) using the following empirical equation (we omit the measurement units) [20]:…”

Review—Metal Oxide Chemoresistive Gas Sensing Mechanism, Parameters, and Applications

“…Thus, the gas concentration of the target gas molecule influences the ratio of transmitted radiation energy to incident energy. 18 Acoustic gas sensor.-The first acoustic gas sensor was developed in 1964. It operates through the detection of bulk acoustic waves (BAWs) in a mass-sensitive piezoelectric quartz crystal resonator.…”