Laser-Induced Breakdown Spectroscopy

Bhatt, Chet R.; Ghany, Charles; Yueh, Fang‐Yu; Singh, Jagdish P.; McIntyre, Dustin

doi:10.1016/b978-0-12-849883-5.00012-7

Cited by 4 publications

(5 citation statements)

References 62 publications

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“…Furthermore, the uneven distribution (inhomogeneity) of the particles on the filter can cause signal fluctuations on each laser shot. These factors can influence the plasma temperature and electron density, which determine the LIBS intensity. ,− …”

Section: Resultsmentioning

confidence: 99%

“…The emitted photons can be collected by fiber optics coupled to a spectrometer and analyzed for sample composition and content. , LIBS has been used in many fields, including the biomedical field, for quantitative and qualitative analyses due to its unique features, such as minimal or no sample preparation and being a relatively fast analysis tool. Also, it requires a tiny amount of samples for the measurements. , In quantitative analysis, calibration curves or multivariate techniques are typically utilized to get the sample’s compositional information. On the other hand, reproducibility is a problem with LIBS as the spectral intensity is sensitive to laser parameters, sample distribution, and atmospheric conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Also, it requires a tiny amount of samples for the measurements. 34,35 In quantitative analysis, calibration curves or multivariate techniques are typically utilized to get the sample's compositional information. On the other hand, reproducibility is a problem with LIBS as the spectral intensity is sensitive to laser parameters, sample distribution, and atmospheric conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

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Sensitive Detection of the Human Epididymis Protein-4 (HE4) Ovarian Cancer Biomarker through a Sandwich-Type Immunoassay Method with Laser-Induced Breakdown Spectroscopy

et al. 2023

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Detection of cancer before the appearance of any symptoms is crucial for successful treatment. Early detection is, however, very challenging, particularly for the types of cancer with few or no symptoms at early stages, such as epithelial ovarian cancer (EOC). Developing a user-friendly method that can detect biomarkers with sufficient selectivity, sensitivity, and reproducibility is a promising approach for overcoming the challenges of early detection of EOC. In this study, we report a sandwich-type microparticle immunoassay for sensitive detection of the HE4 biomarker with laser-induced breakdown spectroscopy. Here, we cross-linked elemental particles to a specific functional group of the targeted biomolecules based on a covalent and non-covalent linking chemistry to improve the sensitivity and selectivity of biomarker detection, in which Fe3O4 and SiO2 microparticles were used to conjugate and purify the antibody–antigen in complex media. Simultaneous detection of Fe and Si from a magnetically purified assay significantly improves the HE4 biomarker’s detectability, in which HE4 was detected with a limit of detection of 0.0022 pM. We also determined the coupling ratio between HE4 and silica particles using a silicon calibration curve.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Sensitive Detection of the Human Epididymis Protein-4 (HE4) Ovarian Cancer Biomarker through a Sandwich-Type Immunoassay Method with Laser-Induced Breakdown Spectroscopy

et al. 2023

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“…Also, 1334 cm −1 and 1076 cm −1 peaks are characteristic of 1 °or 2 °, OH − in-plane bends and cyclic ethers C-O stretch. In addition, the peak at 992 cm −1 and peaks from 859 cm −1 to 760 cm −1 were signatures of vinyl C-H out-of-plane bend and skeletal C-C vibrations [12,13].…”

Section: Ftir Resultsmentioning

confidence: 99%

“…Peaks at 1655 cm −1 and 1072 cm −1 are attributed to amide and 1 0 amine C-N stretch. Peaks between 1072 cm −1 and 1019 cm −1 can be assigned to phosphate ion [13].…”

Section: Ftir Resultsmentioning

confidence: 99%

Starch-Grafted Sodium Alginate-Modified Clay Composites as Environmentally Controlled-Release Materials for NPK Fertilizer

Jindor,

Agorku,

Adimado

2023

Applied and Environmental Soil Science

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In an effort to mitigate the harm caused by the irregular use of agrochemicals, a safer release system using biopolymers is promising due to their availability, biodegradability, and eco-friendliness. Herein, controlled-release materials for NPK fertilizer were formulated using clay-based graft biopolymer composites. The clay soil sample was collected and classified through Skempton’s laboratory tests for soils and used as filler in starch-grafted sodium alginate (ST-g-SAG) with different percentages of clay. The clay-based graft biopolymer composites were synthesized via a microwave-assisted method. The biopolymer composites were characterized by FTIR, SEM, and EDS. The materials were loaded with NPK fertilizer, and a leaching test was conducted via a conductometric method to ascertain their release capacities. Biodegradation studies and the effect of humidity on the release of the NPK fertilizer were studied. Results of classification studies of the clay show Ca-montmorillonite (Ca-MMT) type. The average percent graft yield of starch-grafted sodium alginate/Ca-MMT (ST-g-SAG/Ca-MMT) was 83%. The results from FTIR and EDS showed that OH-, COO-, and CONH2 were responsible for the absorption of water. The release profile of the active NPK in the biocomposites ranged from 1% to 103%. Biodegradation results also showed a significant breakdown in biopolymer structure and mass loss. The release of active NPK from the material was humidity-responsive.

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Identification of fluoroquinolone-resistant Mycobacterium tuberculosis through high-level data fusion of Raman and laser-induced breakdown spectroscopy

Jeon,

Kim,

Kim

et al. 2024

Anal. Methods

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Laser-Induced Breakdown Spectroscopy

Cited by 4 publications

References 62 publications

Sensitive Detection of the Human Epididymis Protein-4 (HE4) Ovarian Cancer Biomarker through a Sandwich-Type Immunoassay Method with Laser-Induced Breakdown Spectroscopy

Sensitive Detection of the Human Epididymis Protein-4 (HE4) Ovarian Cancer Biomarker through a Sandwich-Type Immunoassay Method with Laser-Induced Breakdown Spectroscopy

Starch-Grafted Sodium Alginate-Modified Clay Composites as Environmentally Controlled-Release Materials for NPK Fertilizer

Identification of fluoroquinolone-resistant Mycobacterium tuberculosis through high-level data fusion of Raman and laser-induced breakdown spectroscopy

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