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Sample Preparation for Microplastics by LDIR: Best Practice

, is the founder and CEO of Big Sur Scientific, a maker of portable mid-infrared cannabis analyzers. He has over 30 years experience as an industrial infrared spectroscopist, has published numerous peer-reviewed papers, and has written three books on spectroscopy. As a trainer, he has helped thousands of people around the world improve their infrared analyses. In addition to writing for Spectroscopy, Dr. Smith writes a regular column for its sister publication Cannabis Science and Technology and sits on its editorial board. He earned his PhD in physical chemistry from Dartmouth College.

Articles

We study the spectrum of polymethyl methacrylate (PMMA)—otherwise known as plexiglass—and the spectra of PMMA mixtures and copolymers.

Infrared Spectroscopy of Polymers X: Polyacrylates

We continue our survey of the spectra of carbonyl-containing polymers by looking at cellulose acetate and the economically important polycarbonate Lexan.

Infrared Spectroscopy of Polymers, IX: Pendant Ester Polymers and Polycarbonates

North America: Wednesday, November 16, 2022 at 11am PST | 1pm CST | 2pm EST
Europe: Thursday, November 17, 2022, at 11am BST | 12pm CET
Asia: Thursday, November 17, 2022, at 10:30 IST | 1pm  SGT | 2pm JST | 4pm AEST
Fast, easy, and accurate analysis of microplastics is a key need of anyone with an interest in this area. With the capacity to conduct this analysis directly on the filter in the Agilent 8700 LDIR for microplastics, this analysis has now reached a new level.

Microplastics analysis just got easier: Analysis direct on-filter

The implementation of 120 open-path spectroscopy analyzers at oil refineries has taught us lessons about compound identification, target species detectability, interferences, and data management, which can help spectroscopists generate more accurate data when monitoring air quality.


Real-World Application of Open-Path UV-DOAS, TDL, and FT-IR Spectroscopy for Air Quality Monitoring at Industrial Facilities

An exploration of polyethylene terephthalate (PET), one of the most important polymers, is presented.

Infrared Spectroscopy of Polymers, VIII: Polyesters and the Rule of Three

We continue our survey of the infrared (IR) spectra of polymers with a look at the spectra of polymers that contain carbonyl or C=O bonds. Our long-term goal is to examine the spectra of polymers that contain ketone, carboxylic acid, ester, and carbonate linkages. Studying these spectra is vital, because these molecules are important economically and are ubiquitous in society. 

The Infrared Spectra of  Polymers, VII: Polymers with  Carbonyl (C=O) Bonds 

This issue presents a selection of peer-reviewed articles on the subject of infrared (IR) spectroscopy.

Advances in Infrared Spectroscopy: A Peer-Reviewed Special Issue

In this study, the measured spectra of acetic anhydride, acetic acid, salicylic acid, and aspirin are used for in situ monitoring of the progression of aspirin synthesis in a reaction system. Traditional methods such as HPLC and titration ultraviolet (UV) absorption are not optimal for such real-time monitoring because of long analytical times and complicated procedures. ATR-FT-IR offers an alternative solution that overcomes the shortcomings of traditional techniques.

Online ATR-FT-IR for Real-Time Monitoring of the Aspirin Esterification Process in an Acid-Mediated Reaction

FT-IR offers an alternative method for the quantification and classification of lignocellulose in biofuel pellets, based on determination of cellulose, hemicellulose, and lignin content. The IR spectroscopic evaluation presented here provides an understanding of the pretreatment and storage of biofuel pellets.

Infrared (IR) Spectroscopy