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Abductive statistical methods improve the results of calibration curve bioassays:An example of determining zinc bioavailability in broiler chickens

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Animal Nutrition 2022年第3期10卷 294-304页

作者： Gene M.Pesti Lynne Billard Shu-Biao Wu Robert A.Swick Thi Thanh Hoai Nguyen Natalie Morgan The University of New England ArmidaleNSW2351Australia The University of Georgia AthensGA30602USA

In this paper,we discuss the theory behind calibration curve experiments and their application to a zinc(Zn)bioavailability study with broiler *** replicates of 16 male commercial broiler chicks were fed starter diets for 14 *** diets had different levels of a potential Zn source and one was a positive control with standard industry levels of Zn for *** commonly used methods of calculating bioavailability means and confidence intervals(CI)from a calibration curve(standard curve)experiment to estimate the bioavailability of a new zinc source in broiler chickens were *** methods compared were the following:1)the Counter-Intuitive Method uses a multiple-range test to compare unknown test and standard samples;2)the Intuitive Method uses standard linear regression and inverts the equation to predict Zn bioavailability for each replicate of test samples;3)the Abductive Method uses Graybill's Equation,based on theory and observation,to estimate CI's;and 4)the Sophistic Method uses reverse regression,and calculates Zn bioavailability values directly from the *** Counter-Intuitive Method only gives information about which standards the test samples are,or are not,significantly different from respectively(average available Zn not predicted).The Intuitive Method ignores error about the standard curve and theoretically cannot estimate the CI directly(X±SEM=107.5±15.8 mg Zn/kg).The Sophistic Method underestimates and overestimates the test sample mean values above and below the mean of the standards,respectively(X=96.6 mg Zn/kg).The Abductive Method has an advantage over the other methods:The mean prediction estimation is consistent with theory(107.5±6.1 mg Zn/kg;X±SEM).When test or“unknown”samples are near the mean of the standard samples,the CI is smaller than when near the extremes of the calibration *** calibration curve error is small(R^(2)>approximately 0.95),there is little advantage to using the Abductive Method,but wh

关键词： calibration curve Standard curve Confidence interval Bioavailability

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Matrix effect suppressing in the element analysis of soils by laser-induced breakdown spectroscopy with acoustic correction

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Plasma Science and Technology 2023年第12期25卷 97-104页

作者：何智权刘莉郝中骐徐智帅王奇卢颖赵梓屹史久林何兴道 Key Laboratory of Opto-electronic Information Science and Technology of Jiangxi Province Nanchang Hangkong UniversityNanchang 330063People’s Republic of China Jiangxi Engineering Laboratory for Optoelectronics Testing Technology Nanchang Hangkong UniversityNanchang 330063People’s Republic of China Key Laboratory of Nondestructive Testing(Nanchang Hangkong University) Ministry of EducationNanchang 330063People’s Republic of China

Laser-induced breakdown spectroscopy(LIBS)has been used for soil analysis,but its measurement accuracy is often influenced by matrix effects of different kinds of *** this work,a method for matrix effect suppressing was developed using laser-induced plasma acoustic signals to correct the original spectrum,thereby improving the analysis accuracy of the soil elements.A good linear relationship was investigated firstly between the original spectral intensity and the acoustic *** relative standard deviations(RSDs)of Mg,Ca,Sr,and Ba elements were then calculated for both the original spectrum and the spectrum with the acoustic correction,and the RSDs were significantly reduced with the acoustic ***,calibration curves of MgⅠ285.213 nm,CaⅠ422.673 nm,SrⅠ460.733 nm and BaⅡ455.403 nm were established to assess the analytical performance of the proposed acoustic correction *** values of the determination coefficient(R~2)of the calibration curves for Mg,Ca,Sr,and Ba elements,corrected by the acoustic amplitude,are improved from 0.9845,0.9588,0.6165,and 0.6490 to 0.9876,0.9677,0.8768,and 0.8209,*** values of R~2 of the calibration curves corrected by the acoustic energy are further improved to 0.9917,0.9827,0.8835,and 0.8694,*** results suggest that the matrix effect of LIBS on soils can be clearly improved by using acoustic correction,and acoustic energy correction works more efficiently than acoustic amplitude *** work provides a simple and efficient method for correcting matrix effects in the element analysis of soils by acoustic signals.

关键词： laser-induced breakdown spectroscopy acoustic correction matrix effect calibration curve relative standard deviation

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Determination of Aluminum in Nickel-Based Superalloys by Using Laser-Induced Breakdown Spectroscopy

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Plasma Science and Technology 2011年第4期13卷 486-489页

作者：朱德华王茜倪晓武陈建平陆建 School of Science Nanjing University of Science and Technology Beijing Aeronautical Technology Research Center

Laser-induced breakdown spectroscopy （LIBS） was developed to detect aluminum in nickel-based superalloys （K417, GH4033, DZ125L, З ∏742y） using a non-intensified, non-gated, low-cost detection system. The precision of LIBS depends strongly on the experimental conditions. The calibration curves of Al（I）394.4 nm and Al（I）396.2 nm under the optimum experimental parameters are presented. Finally the limit of detection （LOD） for aluminum is calculated from the experimental data, which is in the range of 0.09% to 0.1% by weight.

关键词： aluminum emission lines LIBS nickel based superalloys calibration curve limit of detection

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A general strategy to quantify analytes through fluorescence chromaticity and luminosity

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Chinese Chemical Letters 2020年第11期31卷 2975-2979页

作者： Tianyu Liang Peiwei Yang Tianhong Wu Menghan Shi Xiayu Xu Taotao Qiang Xiaolong Sun The Key Laboratory of Biomedical Information Engineering of Ministry of Education School of Life Science and TechnologyXi'an Jiaotong UniversityXi'an 710049China College of Bioresources and Materials Engineering Shaanxi University of ScienceTechnologyXi'an 710021China Bioinspired Engineering and Biomechanics Center(BEBC) Xi'an Jiaotong UniversityXi'an 710049China

To realize a fast,easy-operation and precise way using fluorescence probes to quantify analytes is a goal to facilitate detection,especially in ***,we are reporting an approach which can be generally employed for the differentiation and quantitation of analytes through fluorescence chromaticity and *** representative fluorescent probes,targeting p H,cysteine,hydrogen sulfide,hydrogen peroxide,palladium and hydrazine,were synthesized and *** utilizing costly instrumentations,portable devices were employed to collect data of photographs from the fluorescence samples in responses to different ***,the photographic images were digitally processed to generate calibration curves between chromaticity/luminosity verse concentrations after mapping to the CIE 1931 xy Y standard color *** linear calibration curves and quantitative analysis of unknown samples with low errors through the spectral technology demonstrated the reliability of this ***,we showed the analytical method with a simple and on-site constructible/portable device which is promising for applications in more fluorescence probes.

关键词： Fluorescence probes Portable device calibration curve Photography Chromaticity and luminosity

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In situ Analysis of Na and K in a Laminar Premixed Flame by Laser-induced Breakdown Spectroscopy

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Chemical Research in Chinese Universities 2013年第6期29卷 1149-1152页

作者： LI Yu ZHANG Han-zhuang LI Zhong-shan LI Hong-dong ZHANG Chun-wei HU Chang-hong College of Physics Jilin University Changchun 130012 P.R.China State Key Laboratory of Superhard Materials Jilin University Changchun 130012 P.R.China Division of Combustion Physics Lund University Lund Sweden

Laser-induced breakdown spectroscopy（LIBS） was used to in situ monitor the concentration of alkali elements in combustion environments. Particular efforts were made to optimize the temporally resolved spectra of Na and K elements. calibration curves were constructed by relating the intensities of the specific lines to the corres- ponding elemental concentrations. The detection limits of Na and K elements were found to be temperature- dependent. The results indicate that LIBS can be a powerful tool for in situ monitoring Na and K concentrations in combustion environments.

关键词： Laser-induced breakdown spectroscopy(LIBS) Alkali metal Solution-seeded calibration curve

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Effects of CT based Voxel Phantoms on Dose Distribution Calculated with Monte Carlo Method

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Plasma Science and Technology 2005年第2期7卷 2777-2780页

作者：陈朝斌黄群英吴宜灿 Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031China

A few CT-based voxel phantoms were produced to investigate the sensitivity of Monte Carlo simulations of X-ray beam and electron beam to the proportions of elements and the mass densities of the materials used to express the patient’s anatomical structure. The human body can be well outlined by air, lung, adipose, muscle, soft bone and hard bone to calculate the dose distribution with Monte Carlo method. The effects of the calibration curves established by using various CT scanners are not clinically significant based on our investigation. The deviation from the values of cumulative dose volume histogram derived from CT-based voxel phantoms is less than 1% for the given target.

关键词： CT voxel phantom calibration curve Monte Carlo dose calculation

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Research of the metal Cr accumulation in plant leaves using Laser-induced breakdown spectroscopy

Research of the metal Cr accumulation in plant leaves using ...

引用

2011 International Conference on Photonics, 3D-Imaging, and Visualization

作者： Peng Qiumei Liu Muhua Yao Mingyin Chen Tianbing Optics-Electronics Application of Biomaterials Lab College of Engineering Jiangxi Agricultural University

ISBN: (纸本)9780819488473

Laser-induced breakdown spectroscopy（LIBS）,an emerging technique for materials quantitative analysis, is rapidly maturing and is becoming increasingly accepted as an important tool for the metal detection. In this paper, a LIBS system with a 10 Hz Q-switched Nd: YAG ns laser at 1064 nm was employed to research the metal element Cr in plant leaves. Refer to NIST atomic database, the metal element Cr is identified in the soaked sample. According to statistical methods and spectrum analysis software, the calibration curve of the metal element Cr was obtained in our laboratory. The correlation coefficient of calibration curve is 0.97394 for Cr 425.43 nm and 0.94005 for Cr 427.48 nm respectively. The experimental results show LIBS technique is a fast and effective tool for detecting and analyzing the relative intensity of the metal elements and provides the basis of the rapid and continuous detection for plant metal.

关键词： LIBS quantitative analysis metal element calibration curve correlation coefficient

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Closed/Open-Cell Photoacoustic Imaging for Spectroscopic Measurements

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Journal of Applied Mathematics and Physics 2016年第8期4卷 1470-1474页

作者： Tsutomu Hoshimiya Department of Electronic Engineering Tohoku Gakuin University Tagajo Japan

Photoacoustic imaging using a closed photoacoustic cell and an open photoacoustic cell with gas- microphone detection scheme was described. R/G/B LED light sources were used for the closed photoacoustic (PA) cell configuration. The colored specimen enclosed in a PA cell was imaged with R/G/B color light sources, and an image restored from the inverted PA images was compared with the original image. For open cell configuration, an open PA cell using a spheroidal acoustic resonator was applied to measure the amount of large-sized colored specimens. A calibration curve for a food red dye was obtained that apparently showed the ability of the present scheme to measure as a spectroscopic measurement tool.

关键词： Photoacoustic Imaging Spectroscopic calibration curve Color Restoration

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