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Journal articles on the topic 'Absorption Correction Method'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Xiong, Yuanhui, Kuijun Wu, Guangbao Yu, Zhenwei Chen, Linmei Liu, and Faquan Li. "Real-Time Monitoring of SO2 Emissions Using a UV Camera with Built-in NO2 and Aerosol Corrections." Sensors 22, no. 10 (2022): 3900. http://dx.doi.org/10.3390/s22103900.

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Nitrogen dioxide (NO2) absorption correction of the sulfur dioxide (SO2) camera was demonstrated for the first time. The key to improving the measurement accuracy is to combine a differential optical absorption spectroscopy (DOAS) instrument with the SO2 camera for the real-time NO2 absorption correction and aerosol scattering correction. This method performs NO2 absorption correction by the correlation between the NO2 column density measurement of the DOAS and the NO2 optical depth of the corresponding channel from the SO2 camera at a narrow wavelength window around 310 and 310 nm. The error

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2

Pinkal, Patel, A. Panchal Zinal, Patel Sweta, and AdarshJha. "SPECTROPHOTOMETRIC ABSORPTION CORRECTION FOR THE METHOD SIMULTANEOUS ESTIMATION OF MONTELUKAST SODIUM AND BILASTINE IN TABLET DOSAGE FORM." International Journal of Education & Applied Sciences Research 9, no. 2 (2022): 20–28. https://doi.org/10.5281/zenodo.7075239.

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<em>For the simultaneous determination of Montelukast sodium and Bilastine in combination utilising methanol as solvent, a new, simple, effective, explicit, definite, and sensitive UV spectrophotometric absorption correction method has been devised. The absorbance correction approach is based on the additive property. 252 nm and 344 nm were chosen as the wavelengths for the absorption correction technique. While Bilastine exhibited negligible absorbance at 344 nm, Montelukast sodium displayed modest absorbance. At 252 nm, both medications produced absorption. Utilizing measurements of absorban

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3

Ulmer-Moll, S., P. Figueira, J. J. Neal, N. C. Santos, and M. Bonnefoy. "Telluric correction in the near-infrared: Standard star or synthetic transmission?" Astronomy & Astrophysics 621 (January 2019): A79. http://dx.doi.org/10.1051/0004-6361/201833282.

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Context. The atmospheric absorption of the Earth is an important limiting factor for ground-based spectroscopic observations and the near-infrared and infrared regions are the most affected. Several software packages that produce a synthetic atmospheric transmission spectrum have been developed to correct for the telluric absorption; these are Molecfit, TelFit, and Transmissions Atmosphériques Personnalisées pour l’AStronomie (TAPAS). Aims. Our goal is to compare the correction achieved using these three telluric correction packages and the division by a telluric standard star. We want to eval

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4

Ida, Takashi. "Efficiency in the calculation of absorption corrections for cylinders." Journal of Applied Crystallography 43, no. 5 (2010): 1124–25. http://dx.doi.org/10.1107/s0021889810021199.

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Efficiency in the numerical calculation of absorption corrections for cylinders has been examined. Two mathematical expressions for the correction factors have been evaluated by two methods for numerical integration. It has been found that the Gauss–Legendre quadrature applied to the formula proposed by Thorkildsen & Larsen [Acta Cryst.(1998), A54, 172–185] gives results with relative errors ≤10−6, using 12 × 12 terms in the numerical integration. The conventional approach, using Simpson's method in conjunction with the formula given by Dwiggins [Acta Cryst.(1975), A31, 146–148] for the ab

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5

Kotlikov, E. N., and E. V. Iurkovetc. "Method of correction optical spectra for absorption." Journal of Physics: Conference Series 857 (May 2017): 012023. http://dx.doi.org/10.1088/1742-6596/857/1/012023.

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6

Müller, T., A. Virkkula, and J. A. Ogren. "Constrained two-stream algorithm for calculating aerosol light absorption coefficient from the Particle Soot Absorption Photometer." Atmospheric Measurement Techniques 7, no. 12 (2014): 4049–70. http://dx.doi.org/10.5194/amt-7-4049-2014.

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Abstract. We present a new correction scheme for filter-based absorption photometers based on a constrained two-stream (CTS) radiative transfer model and experimental calibrations. The two-stream model was initialized using experimentally accessible optical parameters of the filter. Experimental calibrations were taken from the literature and from dedicated experiments for the present manuscript. Uncertainties in the model and calibration experiments are discussed and uncertainties for retrieval of absorption coefficients are derived. For single-scattering albedos lower than 0.8, the new CTS m

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Buse, Ben, та Stuart Kearns. "Quantification of Olivine Using Fe Lα in Electron Probe Microanalysis (EPMA)". Microscopy and Microanalysis 24, № 1 (2018): 1–7. http://dx.doi.org/10.1017/s1431927618000041.

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AbstractQuantification of first series transition metal Lα X-rays is hampered by absorption and in some cases transition probabilities (fluorescence yields) varying with chemical bonding. Compound mass absorption coefficients for Fe Lα were measured in the olivine solid solution series [Forsterite (Mg2SiO4) to Fayalite (Fe2SiO4)] and the mass absorption coefficients for Fe Lα absorbed by Fe were calculated. The mass absorption coefficients vary systematically between Fo83 and Fo0. Using the measured mass absorption coefficients for both standard and unknown and by correcting for a systematic d

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8

Koziskova, Julia, Friedemann Hahn, Jens Richter та Jozef Kožíšek. "Comparison of different absorption corrections on the model structure of tetrakis(μ2-acetato)-diaqua-di-copper(II)". Acta Chimica Slovaca 9, № 2 (2016): 136–40. http://dx.doi.org/10.1515/acs-2016-0023.

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Abstract Two different absorption correction methods were compared in order to find out which method is preferable to improve solving and refining a crystal structure. Experiments were performed on the crystal of a tetrakis(μ2-acetato)-diaqua-di-copper(II) complex. The first correction method used was the numerical absorption correction with the aid of a crystal-shape model, and the other was the semi-empirical one, applying scaling routines to the intensity data.

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9

Müller, T., A. Virkkula, and J. A. Ogren. "Constrained two-stream algorithm for calculating aerosol light absorption coefficient from the Particle Soot Absorption Photometer." Atmospheric Measurement Techniques Discussions 6, no. 6 (2013): 11093–144. http://dx.doi.org/10.5194/amtd-6-11093-2013.

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Abstract. We present a new correction scheme for filter-based absorption photometers based on a constrained two-stream (CTS) radiative transfer model and experimental calibrations. The two-stream model was initialized using experimentally accessible optical parameters of the filter. Experimental calibrations were taken from literature and from dedicated experiments for the present manuscript. Uncertainties of the model and calibration experiments are discussed and uncertainties for retrieval of absorption coefficients are derived. For single scattering albedos lower than 0.8, the new CTS metho

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10

Horita, Zenji, Ryuzo Nishimachi, Takeshi Sano, and Minoru Nemoto. "point-Analysis Using the Extrapolation Method in the Analytical Electron microscope." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 2 (1990): 430–31. http://dx.doi.org/10.1017/s0424820100135757.

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Absorption correction is often required in quantitative x-ray microanalysis of thin specimens using the analytical electron microscope. For such correction, it is convenient to use the extrapolation method[l] because the thickness, density and mass absorption coefficient are not necessary in the method. The characteristic x-ray intensities measured for the analysis are only requirement for the absorption correction. However, to achieve extrapolation, it is imperative to obtain data points more than two at different thicknesses in the identical composition. Thus, the method encounters difficult

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11

Li, Wen-Bin, Xiao-Yue Yang, Jing-Tao Zhu, et al. "Correction method for the self-absorption effects in fluorescence extended X-ray absorption fine structure on multilayer samples." Journal of Synchrotron Radiation 21, no. 3 (2014): 561–67. http://dx.doi.org/10.1107/s1600577514001970.

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A novel correction method for self-absorption effects is proposed for extended X-ray absorption fine structure (EXAFS) detected in the fluorescence mode on multilayer samples. The effects of refraction and multiple reflection at the interfaces are fully considered in this correction method. The correction is performed ink-space before any further data analysis, and it can be applied to single-layer or multilayer samples with flat surfaces and without thickness limit when the model parameters for the samples are known. The validity of this method is verified by the fluorescence EXAFS data colle

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12

Jiao, Zhaoqiang, Yiwen Li, Ge Chen, Yao Li, Shijie Chai, and Puyousen Zhang. "Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method." Photonics 9, no. 2 (2022): 56. http://dx.doi.org/10.3390/photonics9020056.

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Spectroradiometers exhibit the smallest aberration and the optimum response at the field-of-view (FOV) center. The aberration increases and the response deteriorates at positions further away from the FOV center, which leads to nonuniformity in the spectroradiometer FOV. In this study, a concentric-circles method for correcting the spectroradiometer FOV nonuniformity was developed. The calibration experiment for FOV nonuniformity was conducted by establishing the experimental platform. The nonuniformity correction coefficients were obtained and then used to fit the correction function curve wi

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13

Zhang, Dehuan, Jiaqi Shen, Jingchun Zhou, Erkang Chen, and Weishi Zhang. "Dual-path joint correction network for underwater image enhancement." Optics Express 30, no. 18 (2022): 33412. http://dx.doi.org/10.1364/oe.468633.

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Acquired underwater images often suffer from severe quality degradation, such as color shift and detail loss due to suspended particles’ light absorption and scattering. In this paper, we propose a Dual-path Joint Correction Network (DJC-NET) to cope with the above degenerate issues, preserving different unique properties of underwater images in a dual-branch way. The design of the light absorption correction branch is to improve the selective absorption of light in water and remove color distortion, while the light scattering correction branch aims to improve the blur caused by scattering. Co

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14

Slater, Thomas, Yiqiang Chen, Gregory Auton, Nestor Zaluzec, and Sarah Haigh. "X-Ray Absorption Correction for Quantitative Scanning Transmission Electron Microscopic Energy-Dispersive X-Ray Spectroscopy of Spherical Nanoparticles." Microscopy and Microanalysis 22, no. 2 (2016): 440–47. http://dx.doi.org/10.1017/s1431927616000064.

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AbstractA new method to perform X-ray absorption correction for spherical particles in quantitative energy-dispersive X-ray spectroscopy in the scanning transmission electron microscope is presented. An absorption correction factor is derived and simulated data is presented encompassing a range of X-ray absorption conditions. Theoretical calculations are compared with experimental data of X-ray counts from Au nanoparticles to verify the derived methodology. The effect of detector elevation angle is considered and a comparison with thin-film absorption correction is included.

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15

Li, Fengxiao, Bin Tang, Mingfu Zhao, Xinyu Hu, Shenghui Shi, and Mi Zhou. "Research on Correction Method of Water Quality Ultraviolet-Visible Spectrum Data Based on Compressed Sensing." Journal of Spectroscopy 2021 (July 2, 2021): 1–7. http://dx.doi.org/10.1155/2021/6650630.

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The turbidity interference caused by suspended particles in water seriously affects the accuracy of ultraviolet-visible spectroscopy in detecting water quality chemical oxygen demand. Based on this, the application of ultraviolet-visible spectroscopy to detect water quality chemical oxygen demand usually requires physical and mathematical methods to correct the spectral baseline interference caused by turbidity. Because of the slow response speed and unstable compensation effect of traditional correction methods, this paper proposes to use a compressed sensing algorithm to perform baseline cor

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16

Al-Tuweity, Jawaher, Hassan Kamleh, M. Said Al-Masri, et al. "Determination of correction factor of self-absorption for lead-210 in environment samples using spike method." E3S Web of Conferences 234 (2021): 00051. http://dx.doi.org/10.1051/e3sconf/202123400051.

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In environment radiation measurement, calculation the correction factors are critical, especially for low energy measurement because of self-absorption phenomena. In this work the main purpose is to determination the self-absorption correction factors of lead-210 (210Pb) energy (46.5keV) in various environment samples (7 sediments, 5 soil) using an experimental method called Spike Method. The samples were collecting from different places in Syrian. They were prepared according to the laboratory producers starting from collecting, cleaning, drying, grounding, hemogenic and calculating the appea

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17

Backman, John, Lauren Schmeisser, Aki Virkkula, et al. "On Aethalometer measurement uncertainties and an instrument correction factor for the Arctic." Atmospheric Measurement Techniques 10, no. 12 (2017): 5039–62. http://dx.doi.org/10.5194/amt-10-5039-2017.

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Abstract. Several types of filter-based instruments are used to estimate aerosol light absorption coefficients. Two significant results are presented based on Aethalometer measurements at six Arctic stations from 2012 to 2014. First, an alternative method of post-processing the Aethalometer data is presented, which reduces measurement noise and lowers the detection limit of the instrument more effectively than boxcar averaging. The biggest benefit of this approach can be achieved if instrument drift is minimised. Moreover, by using an attenuation threshold criterion for data post-processing, t

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18

SERA, K., and S. FUTATSUGAWA. "QUANTITATIVE ANALYSIS OF POWDERED SAMPLES COMPOSED OF HIGH-Z ELEMENTS." International Journal of PIXE 08, no. 02n03 (1998): 185–202. http://dx.doi.org/10.1142/s0129083598000224.

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A method of quantitative analysis which is capable of analyzing powdered samples consisting of high-Z elements, such as ash, soil and aerosol, is developed. It is confirmed that an internal standard method using a powdered internal standard, which has almost the same particle size as that of a sample, gives quantitative values of concentration with satisfactory accuracy and reproducibility. It was successfully applied to standard samples such as NIST-Urban particulate matter (1648), GBW-Tibet soil (08302), BCR-City waste incineration ash (0497) and also to a practical fly-ash sample. As a resu

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19

Markov, V. T., G. V. Fetisov, and S. G. Zhukov. "Correction for absorption and beam inhomogeneity in X-ray single-crystal diffractometry: method of analytical integration." Journal of Applied Crystallography 23, no. 2 (1990): 94–98. http://dx.doi.org/10.1107/s0021889889012434.

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A computational method of absorption correction in X-ray diffractometry for single crystals in the shape of convex polyhedra bathed in an inhomogeneous and in a homogeneous X-ray beam is suggested. An absorption correction is calculated for each reflection of the data set using the measured coordinates of the specimen vertices and the experimentally measured intensity distribution in the primary beam. The program ABSCOR is written in Fortran and may be readily adopted to any four-circle diffractometer and data format. The results of the method described for crystals of different dimensions and

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20

Cao, Xuan, Feng Xiong, Yang Wang, et al. "Spectral Analysis of Dissolved Organic Carbon in Seawater by Combined Absorption and Fluorescence Technology." Journal of Marine Science and Engineering 12, no. 12 (2024): 2297. https://doi.org/10.3390/jmse12122297.

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Dissolved organic carbon refers to soluble carbon substances in water bodies and can be used as an important indicator for water pollution. Spectroscopic detection is commonly used to detect dissolved organic carbon in seawater. However, independent spectral methods are susceptible to interference, and insufficient extraction of the data features can occur. Accordingly, this study introduces a multisource spectral fusion method that relies on a combination of principal component analysis and convolutional neural networks to construct the detection model. The Bayesian correction method is used

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21

Bouman, A. A., A. J. Platenkamp, and F. D. Posma. "Determination of Cobalt in Urine by Flameless Atomic Absorption Spectroscopy. Comparison of Direct Analysis Using Zeeman Background Correction and Indirect Analysis Using Extraction in Organic Solution." Annals of Clinical Biochemistry: International Journal of Laboratory Medicine 23, no. 3 (1986): 346–50. http://dx.doi.org/10.1177/000456328602300317.

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Urinary cobalt was determined by flameless atomic absorption spectroscopy. Three methods were compared: (i) direct analysis with deuterium background correction after 11-fold dilution with distilled water (method D), (ii) analysis with deuterium background correction after extraction of cobalt from the urinary matrix in organic solution (method E), and (iii) direct analysis with Zeeman background correction (method Z). The detection limit of the direct analysis of urinary cobalt with deuterium background correction was 6 μg/L, this appeared to be insufficient for the determination of reference

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22

TIAN, Dongfeng, Dong XIE, Yukun HO, and Fujia YANG. "A New Method to Make Gamma-ray Self-absorption Correction." Journal of Nuclear Science and Technology 38, no. 8 (2001): 655–57. http://dx.doi.org/10.1080/18811248.2001.9715079.

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23

Vaudin, Mark D., Martin W. Rupich, Martha Jowett, G. N. Riley, and John F. Bingert. "A method for crystallographic texture investigations using standard x-ray equipment." Journal of Materials Research 13, no. 10 (1998): 2910–19. http://dx.doi.org/10.1557/jmr.1998.0398.

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A fast and accurate method has been developed for measuring crystalline texture in homogeneous materials. The method uses a conventional powder x-ray diffractometer capable of θ scans. Two scans are recorded from the sample: first, a high resolution θ-2θ scan is obtained of a Bragg peak whose diffracting planes are normal to the preferred orientation direction; second, a θ scan is obtained using this peak. The η scan contains the required texture information, but the intensities must be corrected for defocusing and absorption to obtain the texture profile. The θ-2θ scan of the Bragg peak is us

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24

Backman, J., A. Virkkula, V. Vakkari, et al. "Differences in aerosol absorption Ångström exponents between correction algorithms for particle soot absorption photometer measured on South African Highveld." Atmospheric Measurement Techniques Discussions 7, no. 9 (2014): 9733–69. http://dx.doi.org/10.5194/amtd-7-9733-2014.

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Abstract. Absorption Ångstrom exponents (AAE) calculated from filter-based absorption measurements are often used to give information on the origin of the ambient aerosol, for example to distinguish between urban pollution and biomass burning aerosol. Filter-based absorption measurements are a widely used method and are commonly used at aerosol monitoring stations globally. Several correction algorithms are used to account for the artifacts associated with filter-based absorption techniques. These algorithms are of profound importance when determining the absolute amount of absorption by the a

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25

Li, Leyong, Chenbo Xie, Jie Ji, and Kunming Xing. "Research on the Correction Algorithm for Ozone Inversion in Differential Absorption Lidar." Photonics 11, no. 6 (2024): 510. http://dx.doi.org/10.3390/photonics11060510.

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Due to the complex and variable nature of the atmospheric conditions, traditional multi-wavelength differential absorption lidar (DIAL) methods often suffer from significant errors when inverting ozone concentrations. As the detection range increases, there is a higher demand for Signal to Noise Ratio (SNR) in lidar signals. Based on this, the paper discusses the impact of different atmospheric factors on the accuracy of ozone concentration inversion. It also compares the advantages and disadvantages of the two-wavelength differential method and the three-wavelength dual-differential method un

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26

Zhao, Juan, Ke Li, Hao Ban, Xing Zhao, and Xiao Liu. "Analysis and correction of atmospheric absorption attenuation in V-band antenna measurement." Journal of Physics: Conference Series 2967, no. 1 (2025): 012031. https://doi.org/10.1088/1742-6596/2967/1/012031.

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Abstract Atmospheric absorption attenuates electromagnetic waves as they propagate through space. In the V-band, there is a notable peak in atmospheric absorption that impacts antenna calibration and measurement accuracy. In this article, we investigated atmospheric absorption attenuation under different environmental conditions. Based on the investigation, the effect on antenna gain measurements was analysed and an atmospheric absorption correction method was proposed to correct the gain. By applying the method, the antenna gain value increased by approximately 0.05 dB around 60 GHz for a sta

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27

Brokmeier, Heinz Günter, Brigitte Weiss, Sang Bong Yi, Wenhai Ye Yi, Klaus Dieter Liss, and Thomas Lippmann. "Texture Determination of Thin Cu-Wires by Synchrotron Radiation." Materials Science Forum 495-497 (September 2005): 131–36. http://dx.doi.org/10.4028/www.scientific.net/msf.495-497.131.

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A new method to investigate thin wires has been tested, which is based on a special sample holder and on a high energy X-rays. Due to the high penetration power of high energy Xrays quantitative texture data will be obtained without any additional corrections such as constant volume correction and absorption correction. The measurements have been carried out at the high energy beam line BW5 at HASYLAB – DESY (Hamburg). In order to overcome grain statistics problems on the investigated Cu-wire of 122µm thickness a special scanning routine together with the sample preparation allows to average o

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28

Zhao Minjie, 赵敏杰, 司福祺 Si Fuqi, 陆亦怀 Lu Yihuai, et al. "Spectral Image Correction Method for Space-Born Differential Optical Absorption Spectrometer." Acta Optica Sinica 35, no. 12 (2015): 1230002. http://dx.doi.org/10.3788/aos201535.1230002.

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29

Burdet, Pierre, Z. Saghi, A. N. Filippin, A. Borrás, and P. A. Midgley. "A novel 3D absorption correction method for quantitative EDX-STEM tomography." Ultramicroscopy 160 (January 2016): 118–29. http://dx.doi.org/10.1016/j.ultramic.2015.09.012.

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30

Belali, R., and J. M. Vigoureux. "Transposition to Attenuated Total Reflection of Classical Laws Used in Transmission Spectroscopy: Application to Crystallinity Determination of Polyethylene Terephtalate Films." Applied Spectroscopy 48, no. 4 (1994): 465–71. http://dx.doi.org/10.1366/000370294775268992.

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We examine the problem which occurs when distinct absorption bands are compared. This problem is linked to the variation of the analyzed thickness of the sample according to the wavelength of the incident beam. Theoretical and experimental corrections are proposed to solve this problem. The theoretical correction is next used to calculate the degree of crystallinity of three polyethylene terephtalate films which cannot be determined by the usual method of transmission spectroscopy.

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31

Al-Tuweity, Jawaher, Hassan Kamleh, M. Said Al-Masri, A. Wael Doubal, and El Mahjoub Chakir. "Self-absorption Correction Factors: Applying A Simplified Method to Analysis of Lead-210 in Different Environment Samples by Direct Counting of Low-energy Using HPGe Detector." E3S Web of Conferences 240 (2021): 03002. http://dx.doi.org/10.1051/e3sconf/202124003002.

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This study aimed to determine the self-absorption correction factors of lead-210 (210Pb) in various Syrian environment samples. Seven sediments, five soils, and four plant samples were analysed by Gamma Spectroscopy using simple and direct analysis method called Cutshall. The method is based on measuring the penetration of gamma which emitted from a standard source, prepared in the laboratory by deposition of QCYB40 Standard Solution on stainless steel disk. The source was placed on top of the studied sample and the reference air sample during the measurement. The purpose was to study the self

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Nusair, O. "Corrections to Kusnetz method for measurements of radon progeny concentrations in air." Journal of Instrumentation 16, no. 12 (2021): T12014. http://dx.doi.org/10.1088/1748-0221/16/12/t12014.

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Abstract In 1956, H.L. Kusnetz proposed a quick method for radon progeny concentration measurement in mine atmosphere using a single gross-alpha count of a membrane-filtered air. The method is still widely used today and is based on a number of impractical assumptions. An instantaneous sampling time (less than ten seconds), is one of these assumptions that ignores the build-up and decay of the progeny on the filter paper during the sampling period, which is typically in the order of a few minutes. Of special concern is the 214Bi decay during the sampling period, since 214Po's alphas are lost d

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Nadia, Garg, Jain Ravi, and Sharma Raksha. "Color Cast Correction Mechanisms: Techniques and Innovations for Image Enhancement." International Journal of Emerging Research in Engineering, Science, and Management 2, no. 4 (2023): 05–16. https://doi.org/10.58482/ijeresm.v2i4.2.

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This paper presents an in-depth examination of color cast in digital images, elucidating its fundamental principles, generation mechanisms, and real-world implications influenced by light absorption and scattering. The study explores diverse color cast correction methods and provides a detailed analysis of their respective outcomes. Foundational knowledge of color cast, rooted in the principles of light interaction, serves as the basis for understanding its manifestation in various real-world contexts. The research systematically investigates the intricate dynamics of color cast across diverse

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Azanza Ricardo, Cristy L., Mirco D'Incau, and Paolo Scardi. "Revision and extension of the standard laboratory technique for X-ray diffraction measurement of residual stress gradients." Journal of Applied Crystallography 40, no. 4 (2007): 675–83. http://dx.doi.org/10.1107/s0021889807022935.

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A new procedure is proposed to determine sub-surface residual stress gradients by laboratory X-ray diffraction measurements at different depths using a chemical layer-removal technique. The standard correction algorithm for stress relaxation due to layer removal is improved by including corrections for X-ray absorption, and by the addition of constraints imposed by the mechanical equilibrium conditions. Besides correcting the data,i.e.providing more reliable through-thickness residual stress trends, the proposed procedure also provides an elastically compatible and plausible estimate of the re

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Womack, James D., Charles K. Mann, and Thomas J. Vickers. "Correction for Absorption in Raman Measurements Using the Backscattering Geometry." Applied Spectroscopy 43, no. 3 (1989): 527–31. http://dx.doi.org/10.1366/0003702894202841.

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Correction for sample absorption in resonance Raman measurements employing the backscattering geometry has been re-examined. A widely used procedure [see Appl. Spectrosc. 28, 319 (1974)] fails to provide adequate correction under most measurement conditions. A method which accounts for the effect of the transfer function of the collection optics is shown to provide excellent results for a variety of measurement conditions. The required calculations and a method for obtaining the optical transfer function are described. Measurements on solutions of a strongly absorbing azo dye with the use of 5

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Yanchukovsky, Valery, and Vasiliy Kuz'menko. "Method of automatic correction of neutron monitor data for precipitation in the form of snow in real time." Solar-Terrestrial Physics 7, no. 3 (2021): 114–20. http://dx.doi.org/10.12737/stp-73202108.

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We have carried out an experimental study of the influence of precipitation in the form of snow on measurements of the neutron flux intensity near Earth's surface. We have examined the state of the snow cover and its density, and found out that the density depends on the depth of the snow cover. Using the experimental results, we estimate the neutron absorption path in the snow. Changes in snow cover by 10–12 cm at a depth of 80 cm are shown to cause variations in the monitor count rate with an amplitude of 0.9 %. At the snow depth of 80 cm, the neutron monitor count rate decreases by about 8

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37

Ridder, T., T. Warneke, and J. Notholt. "Source brightness fluctuation correction of solar absorption Fourier Transform mid infrared spectra." Atmospheric Measurement Techniques Discussions 4, no. 1 (2011): 443–59. http://dx.doi.org/10.5194/amtd-4-443-2011.

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Abstract. Solar absorption Fourier Transform infrared spectrometry is considered a precise and accurate method for the observation of trace gases in the atmosphere. The precision and accuracy of such measurements are dependent on the stability of the light source. Fluctuations in the source brightness reduce the precision and accuracy of the trace gas concentrations, but cannot always be avoided. Thus, a strong effort is made within the community to reduce the impact of source brightness fluctuations by applying a correction on the spectra following the measurements. So far, it could be shown

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Ali, Diyar Salahuddin. "Chemometric Methods for Simultaneous Determination of Candesartan Cilexetil and Hydrochlorothiazide in Binary Combinations." Journal of Analytical Methods in Chemistry 2023 (January 17, 2023): 1–14. http://dx.doi.org/10.1155/2023/5107317.

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Simple, accurate, precise, and cost-effective chemometric techniques for the measurement of candesartan cilexetil and hydrochlorothiazide in synthetic mixtures were improved and validated. H-point standard addition, Q-absorption ratio, and correction absorbance spectrophotometric techniques were utilized for the simultaneous determination of both medicines in real pharmaceutical formulations. A new calibration approach was implemented based on chemical H-point standards. This approach was developed to resolve significantly overlapping spectra of two analytes and provide direct correction of bo

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Surmick, David M., and Christian G. Parigger. "Tracking Temporal Development of Optical Thickness of Hydrogen Alpha Spectral Radiation in a Laser-Induced Plasma." Atoms 7, no. 4 (2019): 101. http://dx.doi.org/10.3390/atoms7040101.

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In this paper, we consider the temporal development of the optical density of the H α spectral line in a hydrogen laser-induced plasma. This is achieved by using the so-called duplication method in which the spectral line is re-imaged onto itself and the ratio of the spectral line with it duplication is taken to its measurement without the duplication. We asses the temporal development of the self-absorption of the H α line by tracking the decay of duplication ratio from its ideal value of 2. We show that when 20% loss is considered along the duplication optical path length, the ratio is 1.8 a

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Simabuco, S. M., and V. F. Nascimento Filho. "Quantitative analysis by energy dispersive X-ray fluorescence by the transmission method applied to geological samples." Scientia Agricola 51, no. 2 (1994): 197–206. http://dx.doi.org/10.1590/s0103-90161994000200001.

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Three certified samples of different matrices (Soil-5, SL-1/IAEA and SARM-4/SABS) were quantitatively analysed by energy dispersive X-ray fluorescence with radioisotopic excitation. The observed errors were about 10-20% for the majority of the elements and less than 10% for Fe and Zn in the Soil-5, Mn in SL-1, and Ti, Fe and Zn in SARM-4 samples. Annular radioactive sources of Fe-55 and Cd-109 were utilized for the excitation of elements while a Si(Li) semiconductor detector coupled to a multichannel emulation card inserted in a microcomputer was used for the detection of the characteristic X-

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Sima, O. "On the method of Dryak et al. for self-absorption correction calculations." Journal of Radioanalytical and Nuclear Chemistry Letters 155, no. 2 (1991): 75–78. http://dx.doi.org/10.1007/bf02165060.

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Horita, Z., M. R. McCartney, and J. K. Weiss. "Computer-assisted extrapolation method for absorption correction in quantitative X-ray microanalysis." Ultramicroscopy 45, no. 2 (1992): 263–65. http://dx.doi.org/10.1016/0304-3991(92)90514-k.

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Bao, Sheng Xiang. "Absorption correction method based on the power function of continuous scattered radiation." X-Ray Spectrometry 27, no. 5 (1998): 332–36. http://dx.doi.org/10.1002/(sici)1097-4539(199809/10)27:5<332::aid-xrs271>3.0.co;2-p.

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Kotlikov, E. N., N. P. Lavrovskaya, I. K. Miloushev, and T. K. Tenev. "Investigation of optical constants of Al₂O₃ films in the spectral range 0.2 - 0.8 microns." Journal of Physics: Conference Series 2436, no. 1 (2023): 012005. http://dx.doi.org/10.1088/1742-6596/2436/1/012005.

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Abstract We determine optical constants of Al2O3 films deposited by electron beam evaporation on a quartz substrate in the spectrum range 0.2-0.8 microns. Refractive index and extinction coefficient are determined by a spectrophotometric method using the reflection and transmission spectra. An original method of correction of the spectra of the films is used taking into account the absorption. The refractive index is determined from absorption-free spectra, and the extinction coefficient is determined from absorption spectra in the specified spectral region.

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Li, Wen-bin, Xiao-feng Yuan, Jing-tao Zhu, Jie Zhu, and Zhan-shan Wang. "Correction method for self-absorption effects of fluorescence x-ray absorption near-edge structure on multilayer samples." Physica Scripta 90, no. 1 (2014): 015804. http://dx.doi.org/10.1088/0031-8949/90/1/015804.

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John, Lekha Mary, BalakrishnaPrabhu B. N., and K. K. Anoop. "Continuum removal and self-absorption correction incalibration-free laser-induced breakdownspectroscopy for efficient elemental analysis." IOP Conference Series: Materials Science and Engineering 1221, no. 1 (2022): 012020. http://dx.doi.org/10.1088/1757-899x/1221/1/012020.

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Abstract Even though laser-induced breakdown spectroscopy (LIBS) has emerged as a powerful analytical technique, the broad continuum emission and self-absorption effects in laser-produced plasmas (LPP) limit the accuracy of the LIBS technique in multi-elemental compositional analysis. In this work, we developed an algorithm to detect and remove the broad continuum emission, which usually originates from free-free and free-bound transitions. To eliminate the continuum, the segment-wise background correction method (using identified continuum parts of varied range) was used. The spectral interfe

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Ge, Mingyuan, Xiaojing Huang, Hanfei Yan, et al. "(Invited) Self-Absorption Correction in X-Ray Fluorescence Imaging." ECS Meeting Abstracts MA2022-01, no. 38 (2022): 1651. http://dx.doi.org/10.1149/ma2022-01381651mtgabs.

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The self-absorption problem in the x-ray fluorescence (XRF) imaging community is a long-lasting and grand challenge to achieve quantitative analysis. Accurate correction is of broad interest in many disciplines, including material science, environmental science, and biology. The researchers desire to obtain a 3D structure with accurate material compositions or trace element distributions from complex 3D specimens with multi-components. We will present a generalized absorption correction method, which works broadly for 2D and 3D imaging. With the developed method, we reveal internal 3D elementa

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SERA, K., S. FUTATSUGAWA, and D. ISHIYAMA. "APPLICATION OF A POWDERED-INTERNAL-STANDARD METHOD COMBINED WITH CORRECTION FOR SELF-ABSORPTION OF X-RAYS TO GEOLOGICAL, ENVIRONMENTAL AND BIOLOGICAL SAMPLES." International Journal of PIXE 09, no. 01n02 (1999): 63–81. http://dx.doi.org/10.1142/s0129083599000115.

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Availability of a powdered internal standard method developed in the previous report has been investigated in detail for geological, mineralogical, environmental and biological samples. It is found that this method is effective for various powdered samples composed of high-Z elements. A computer program for correcting self-absorption of x-rays, which is based on the method we previously reported, was developed and it has been applied to soil samples of varied thickness. As a result, it is found that the method is quite effective even for a pretty thick target where particles overlap with each

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Sankpal, Sonali Sachin, and Shraddha Sunil Deshpande. "Nonuniform Illumination Correction Algorithm for Underwater Images Using Maximum Likelihood Estimation Method." Journal of Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/5718297.

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Scattering and absorption of light is main reason for limited visibility in water. The suspended particles and dissolved chemical compounds in water are also responsible for scattering and absorption of light in water. The limited visibility in water results in degradation of underwater images. The visibility can be increased by using artificial light source in underwater imaging system. But the artificial light illuminates the scene in a nonuniform fashion. It produces bright spot at the center with the dark region at surroundings. In some cases imaging system itself creates dark region in th

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Dong, Juan, Long Liang, Jiao Wei, et al. "A method for improving the accuracy of calibration-free laser-induced breakdown spectroscopy (CF-LIBS) using determined plasma temperature by genetic algorithm (GA)." Journal of Analytical Atomic Spectrometry 30, no. 6 (2015): 1336–44. http://dx.doi.org/10.1039/c4ja00470a.

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An internal reference-external standard with iteration correction (IRESIC) method is proposed to correct for the self-absorption effect and plasma temperature in CF-LIBS based on an internal reference line and one standard sample.

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