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Gold fingerprinting uses laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) to analyze the trace element composition of gold and generate unique profiles for different sources. LA-ICP-MS involves using a pulsed laser beam to ablate a gold sample, then analyzing the created aerosols in an inductively coupled plasma and mass spectrometer to identify the sample's constituents and measure concentrations. These fingerprints are stored in a gold bullion databank to determine the provenance of unknown gold samples.
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Ophthalmic preparations
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Application of ICP-MS and LC-ICP-MS in Drug Development
Application of ICP-MS and LC-ICP-MS in Drug Development
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libs applications in medical and dental firld lecture .pptx
LIBS, or laser-induced breakdown spectroscopy, is an analytical technique that can be used to determine the elemental composition of solid, liquid, or gas samples. LIBS works by focusing a laser pulse onto a sample, which vaporizes, atomizes, and excites it, creating a microplasma. The emission from the plasma is collected and analyzed to determine the sample's elemental composition based on atomic emission lines. LIBS offers advantages over other elemental analysis techniques like its ability to rapidly analyze a sample without requiring preparation in just a few seconds. The document provides an overview of LIBS fundamentals, techniques, applications including for coin analysis, and compares it to other analytical methods. It also discusses uses of LIBS for biomedical
INDUCTIVELY COUPLED PLASMA -ATOMIC EMISSION SPECTROSCOPY
Inductively coupled plasma atomic emission spectroscopy (ICP-AES) uses a plasma to produce excited atoms and ions that emit electromagnetic radiation at wavelengths specific to elements. The document discusses how ICP-AES works, including that a sample is nebulized and transported to the plasma by a pump and spray chamber. A spectrometer then measures the intensity of radiation emitted to determine analyte concentration. ICP-AES can perform simultaneous analysis and is used in applications such as clinical analysis, environmental analysis, and forensic science.
INDUCTIVELY COUPLED PLASMA -ATOMIC EMISSION SPECTROSCOPY
Inductively coupled plasma atomic emission spectroscopy (ICP-AES) uses a plasma to produce excited atoms and ions that emit electromagnetic radiation at wavelengths specific to elements. The document discusses how ICP-AES works, including that a sample is nebulized and transported to the plasma where it is atomized and excited, emitting radiation measured by a spectrometer. Common applications are clinical, environmental, pharmaceutical and industrial analysis to determine trace metal concentrations.
NANOFORENSICS: AN EMERGING FIELD IN CRIMINAL INVESTIGATION AND FORENSIC SCIENCE
NANOFORENSICS: AN EMERGING FIELD IN CRIMINAL INVESTIGATION AND FORENSIC SCIENCEForensic Science Section, Department of Anthropology, University of Delhi
The presentation describes the emerging scope of Nanotechnology in the field of forensic science and criminal investigation which further strengthens the investigative measures and enriches the area of research and development in the field of forensic scienceLaser ablation - optical cavity isotopic spectrometer (LAOCIS) for Mars rovers
Proceedings of SPIE, v. 8385, "Sensors and Systems for Space Applications V"; Baltimore, MD, 2012. ABSTRACT: A concept of a compact device for analyzing key isotopic composition in surface materials without sample preparation is presented. This design is based on an advanced modification of Laser Induced Breakdown Spectroscopy (LIBS). First, we developed Laser Ablation Molecular Isotopic Spectrometry (LAMIS) that involves measuring isotope-resolved molecular emission, which exhibits significantly larger isotopic spectral shifts than those in atomic transitions. Second, we used laser ablation to vaporize the sample materials into a plume in which absorption spectra can be measured using a tunable diode laser. The intrinsically high spectral resolution of the diode lasers facilitates measurements of isotopic ratios. The absorption sensitivity can be boosted using cavity enhanced spectroscopy. Temporal behavior of species in a laser ablation plasma from solid samples with various isotopic composition was studied. Detection of key isotopes associated with signs of life (carbon, nitrogen, hydrogen) as well as strontium and boron in laser ablation plume was demonstrated; boron isotopes were quantified. Isotope-resolved spectra of many other molecular species were simulated. The experimental results demonstrate sensitivity to 86 Sr, 87 Sr, and 88 Sr with spectrally resolved measurements for each of them. It is possible to measure strontium isotopes in rocks on Mars for radiogenic age determination. Requirements for spectral resolution of the optical measurement system can be significantly relaxed when the isotopic abundance ratio is determined using chemometric analysis of spectra.
Analytical instrument
In mineral science, there are several analytical instruments used for various purpose, viz…
Scanning electron microscopy
X-ray diffraction
Transmission electron microscopy
X-ray fluorescence
Flame atomic absorption spectroscopy
Electron microprobe analysis
Secondary ion mass spectrometry
Atomic force microscopy
Lecture-9 SIMS NDT with all detail in method.ppt
SIMS is a technique that uses a focused primary ion beam to bombard a sample surface, emitting secondary ions that are then analyzed using mass spectrometry. It allows for highly sensitive elemental and isotopic analysis of surfaces down to parts-per-billion. SIMS can be used in either static or dynamic mode to obtain spatial or depth profiles of sample composition. While very sensitive, it is also an expensive technique. Common applications include detecting trace impurities in semiconductors and generating high-resolution maps of elemental distributions.
Lecture-9 SIMS NDTDDDDDDDDDDDDDDDDDD.ppt
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11. malibs in argon (jo pcs)
This document discusses a study on enhancing laser-induced plasma emission from gadolinium oxide samples using microwaves in argon gas. The study aims to improve laser-induced breakdown spectroscopy (LIBS) for potential nuclear fuel material analysis. When microwaves were introduced into the laser-induced plasma, total emission intensity from gadolinium significantly increased. Emission lines could be more clearly identified with lower background intensity and disturbance from molecular bands. Microwave-assisted laser plasma showed enhancement factors of 40-45 times for neutral and ionic gadolinium lines. Plasma temperatures were also higher with microwaves. The method shows promise for improving impurity analysis in complex nuclear fuel materials.
IR Spectroscopy.pptx
IR spectroscopy analyzes the absorption of infrared radiation by molecules and provides information about molecular structure and functional groups. It works based on the coupling of vibrational and rotational energy levels in molecules when IR radiation is absorbed, causing transitions between these levels. The spectrum produced depends on the vibrational modes of bonds in the molecule. IR spectroscopy is useful for identifying functional groups and structures in both organic and inorganic compounds. It has applications in fields like pharmaceutical analysis, forensic science, and chemical analysis.
Q045068996
This document discusses the nonlinear optical properties of copper nanoparticles prepared by pulse laser ablation in different solutions. Copper nanoparticles were synthesized in distilled water, deionized water, and a mixture of ethylene glycol and deionized water using a nanosecond pulsed Nd:YAG laser. Characterization using UV-visible spectroscopy and SEM showed the nanoparticles had surface plasmon resonance peaks between 590-676 nm and diameters ranging from 13.16-21.25 nm depending on the solution. Z-scan measurements determined the nonlinear refractive index and nonlinear absorption coefficient of the copper nanoparticle suspensions.
Laser Ablation Molecular Isotopic Spectrometry for rare isotopes of the light...
Laser ablation molecular isotopic spectrometry (LAMIS) involves measuring isotope-resolved molecular emission. Measurements of several key isotopes (hydrogen, boron, carbon, nitrogen, oxygen, and chlorine) in laser ablation plumes were demonstrated. Requirements for spectral resolution of the optical detection system could be significantly relaxed when the isotopic ratio was determined using chemometric regression models. Multiple applications of LAMIS are anticipated in the nuclear power industry, medical diagnostics and therapies, forensics, carbon sequestration, and agronomy studies.
Mridu-ICP-MS.pptx
ICP-MS (inductively coupled plasma mass spectrometry) is an analytical technique used to detect and measure elements in chemical samples. It works by ionizing atoms from a sample using an inductively coupled plasma and then detecting the mass-to-charge ratios of the resulting ions using a mass spectrometer. ICP-MS can detect elements at concentrations as low as parts per trillion and has a wide working range of nine orders of magnitude. It is capable of isotopic analysis and multi-element detection across most of the periodic table. ICP-MS has various applications in fields like medicine, materials science, and environmental analysis.
X - RAY CRYSTALLOGRAPHY TECHNIQUE
X-ray crystallography is a technique used to determine the atomic structure of crystals. It involves firing X-rays at a crystal and measuring the scattering pattern, which can reveal the positions of atoms within the crystal. Key apparatus include an X-ray source, filters and monochromators to produce a single wavelength beam, a diffractometer to rotate the crystal and detector, and an X-ray detector. The procedure involves growing crystals, collecting diffraction data, solving the crystal structure through methods like molecular replacement, and refining the structural model. X-ray crystallography is used to study biological molecules and materials that form crystals.
ICP-AES.pptx
ICP-AES is a technique that uses inductively coupled plasma to atomize and excite a sample, then detects the emission of light at specific wavelengths to identify elements present and their concentrations. It has several advantages like high sensitivity, ability to detect trace elements, capacity for multi-element analysis, and producing accurate and precise results. However, it also has some disadvantages such as high costs, complex sample preparation requirements, and requiring a skilled operator.
X ray spectroscopy
This document discusses X-ray diffraction (XRD), a technique used to determine the composition and crystalline structure of materials. It begins by explaining how X-rays are produced, then describes Bragg's law of diffraction which is fundamental to XRD. The three main XRD methods are outlined: Laue's method, rotating crystal method, and powder method. Finally, several applications of XRD are listed, including use in pharmaceutical, forensic, geological, microelectronics, and glass industries.
Final Poster- Gold Nanoparticle sensor strips for detection of DNA components...
- Gold nanoparticles were synthesized in two sizes using hydrogen tetrachloroaurate and sodium citrate. Larger nanoparticles (around 0.02 M) were found to be more effective substrates for detecting adenine using Surface-Enhanced Raman Spectroscopy (SERS) on filter paper strip sensors.
- Testing showed that strips could detect adenine concentrations in a few seconds using portable materials. Further work should test other DNA/RNA components on the strips and develop an inkjet printing method for quick sensor reproduction.
- In conclusion, the strip sensors were a fast, simple method for detecting DNA components and have potential applications in medicine and detecting biological agents if further optimized.
Analytical Techniques .pptx
This document discusses several analytical techniques used for chemical analysis including nuclear magnetic resonance spectroscopy (NMR), mass spectrometry (MS), ultraviolet-visible spectroscopy (UV-VIS), and single-crystal X-ray diffraction (XRD). NMR is useful for elucidating chemical structures but has lower sensitivity than MS. MS allows characterization of a broad range of compounds but some metal complexes have weak solubility or stability. UV-VIS is a simple technique used to identify compounds by comparing spectra. XRD can identify unknown compounds fast but has limitations related to samples and detection.
X ray powder diffraction &
X-ray powder diffraction is a technique used to identify unknown crystalline materials by analyzing the scattering pattern produced when a beam of X-rays interacts with a powdered sample. It can provide information on a material's unit cell dimensions and phase identification. A powder diffractometer directs a monochromatic X-ray beam at a sample and measures the intensities of the diffracted beams. Common types include Bragg-Brentano and powder camera diffractometers. X-ray powder diffraction is a powerful and rapid technique for mineral identification and characterization of crystalline materials.
Atomic absorption spectroscopy
This document discusses atomic absorption spectroscopy (AAS), a technique used to determine the concentration of metals in samples. AAS works by vaporizing the sample into atoms and measuring how much light of a specific wavelength is absorbed. It can detect over 62 elements and is commonly used to analyze metals in environmental samples, foods, and other materials. The document outlines the basic components of an AAS including the light source, atomizer, monochromator, and detector. It also explains how AAS is performed and calibrated to determine unknown concentrations from a calibration curve.
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libs applications in medical and dental firld lecture .pptx
libs applications in medical and dental firld lecture .pptx
INDUCTIVELY COUPLED PLASMA -ATOMIC EMISSION SPECTROSCOPY
INDUCTIVELY COUPLED PLASMA -ATOMIC EMISSION SPECTROSCOPY
INDUCTIVELY COUPLED PLASMA -ATOMIC EMISSION SPECTROSCOPY
INDUCTIVELY COUPLED PLASMA -ATOMIC EMISSION SPECTROSCOPY
NANOFORENSICS: AN EMERGING FIELD IN CRIMINAL INVESTIGATION AND FORENSIC SCIENCE
NANOFORENSICS: AN EMERGING FIELD IN CRIMINAL INVESTIGATION AND FORENSIC SCIENCE
Laser ablation - optical cavity isotopic spectrometer (LAOCIS) for Mars rovers
Laser ablation - optical cavity isotopic spectrometer (LAOCIS) for Mars rovers
Laser Ablation Molecular Isotopic Spectrometry for rare isotopes of the light...
Laser Ablation Molecular Isotopic Spectrometry for rare isotopes of the light...
Final Poster- Gold Nanoparticle sensor strips for detection of DNA components...
Final Poster- Gold Nanoparticle sensor strips for detection of DNA components...
Nat Sci10
- 1. Gold Fingerprinting by Laser Ablation Inductively Coupled Plasma-Mass Spectometry