Icp-oes Analysis
Icp-oes Analysis - Related Videos
09:51
Standards for Quantitative Metalloproteomic Analysis Using Size Exclusion ICP-MS
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Cited by 34 •
2016
Size exclusion chromatography hyphenated with inductively coupled plasma - mass spectrometry (ICP-MS) is a powerful tool to measure changes in the abundance of metalloproteins directly from biological samples. Here we describe a set of metalloprotein standards used to estimate molecular mass and the amount of metal associated with unknown proteins.
01:20
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences
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2024
Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and refractory oxide ion...
01:19
Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview
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2024
In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then passed on to...
09:05
Imaging Metals in Brain Tissue by Laser Ablation - Inductively Coupled Plasma - Mass Spectrometry (LA-ICP-MS)
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Cited by 40 •
2017
Quantitatively mapping metals in tissue by laser ablation - inductively coupled plasma - mass spectrometry (LA-ICP-MS) is a sensitive analytical technique that can provide new insight into how metals participate in normal function and disease processes. Here, we describe a protocol for quantitatively imaging metals in thin sections of mouse neurological tissue.
06:53
Preparation of Food Samples Using Homogenization and Microwave-Assisted Wet Acid Digestion for Multi-Element Determination with ICP-MS
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Cited by 3 •
2023
The presented protocol describes sample homogenization with a laboratory mixer, acid digestion of food samples using a mixture of 68 wt% HNO3 and 30 wt% H2O2 via microwave-assisted wet acid digestion, and multi-element determination performed with inductively coupled plasma mass spectrometry.
FAQs
The plasma excites atoms and ions, causing each element to emit light at characteristic wavelengths. The instrument uses these wavelength differences to identify which elements are present, while the strength of each emission provides measurement information. This allows several elements to be examined within the same biological material rather than evaluating only one elemental target.
Emission intensity provides the quantitative link between observed light and the amount of an element in the sample. Researchers establish this relationship through calibration, then compare measured signals with the calibrated response to estimate concentration. Accurate interpretation therefore depends on treating wavelength as the identification signal and intensity as the concentration-related signal.
The sample must enter the high-temperature argon plasma as an aerosol so that its constituents can interact with the excitation environment. Within the plasma, atoms and ions become excited and emit element-specific light. This transformation from a prepared sample into measurable optical emissions enables elemental information to be obtained from complex biological materials.
A typical workflow introduces the biological sample into the instrument as an aerosol, exposes its constituents to the high-temperature argon plasma, and records the resulting element-specific emissions. The measured emission wavelengths support elemental identification, while emission intensities are interpreted using calibration to determine concentrations. These stages connect sample introduction, excitation, detection, and quantification.
The technique can be applied to tissues, cells, body fluids, plants, and environmental samples associated with biological studies. This range supports comparisons among biological compartments and between organisms or their surroundings. The selected material depends on the research question, such as examining elemental composition, nutrient status, metal distribution, or possible contamination.
Biologists use the method to investigate nutrient metabolism, metal homeostasis, toxicology, contamination, and the elemental composition of biological systems. Measuring essential and trace elements can help connect elemental concentrations with biological processes or exposure conditions. Its multi-element capability is especially useful when several elements may contribute to the same physiological or environmental question.