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Raman Spectroscopy: Overview

Raman Spectroscopy: Overview

The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...

Raman Spectroscopy Instrumentation: Overview

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...

Applications of IR Spectroscopy: Overview

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The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...

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Related Experiment Video

Updated: Jan 10, 2026

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

Published on: December 16, 2016

Applications of Raman spectroscopy for microplastic detection and characterization: a comprehensive spectral

Yasemin Umurhan¹, Mackenzie Songsart-Power², Tej B Limbu²

¹Department of Environmental and Interdisciplinary Science, Texas Southern University, Houston, TX, USA.

Environmental Science and Pollution Research International

|November 27, 2025

Summary

Raman spectroscopy offers a non-destructive method for identifying microplastics (MPs) in various environments. This review consolidates spectral data and discusses advanced techniques to improve MP detection and aid pollution control efforts.

Keywords:

Environmental contamination Microplastics detection Polymer identification Raman spectroscopy Spectral library

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Last Updated: Jan 10, 2026

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

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Published on: December 16, 2016

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Sampling and Identification of Microplastics in Groundwater

Published on: November 7, 2025

Multimodal Analysis of Microplastics in Drinking Water using a Silicon Nanomembrane Analysis Pipeline

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Published on: June 13, 2025

Area of Science:

Environmental Science
Analytical Chemistry
Spectroscopy

Background:

Microplastics (MPs) are pervasive pollutants with potential ecological and health risks.
Accurate detection and characterization of MPs are crucial for understanding their impact.

Purpose of the Study:

To review the application of Raman spectroscopy for microplastic detection and characterization.
To consolidate spectral signatures of common polymers found in MPs.
To evaluate advancements in Raman spectroscopy for improved analytical precision and sensitivity.

Main Methods:

Review of literature on Raman spectroscopy applications for MP analysis.
Consolidation of Raman spectral signatures for polymers like polystyrene, polyester, and PET.
Evaluation of techniques including CARS, SERS, and CRT for MP detection.

Main Results:

Raman spectroscopy is a viable non-destructive technique for MP identification.
Challenges include fluorescence interference and matrix complexity.
Innovations like CARS, SERS, and CRT enhance detection capabilities.

Conclusions:

This review provides a comprehensive reference for Raman spectral data of MPs.
Practical insights are offered to guide future research in MP detection.
Advancements in Raman spectroscopy are key to mitigating microplastic pollution.