Informing Spectroscopists for Over 40 Years

Articles

Specifying accuracy and precision criteria for ultraviolet spectrometers

Chris Burgess, John P. Hammond

Some compliance requirements would seem to make impossible demands on the performance specification of “fitness for purpose” for ultraviolet spectrometers; Chris and John unravel what’s going on.

QM Column  |  Issue 31/2 (2019)

Shedding light on medieval manuscripts

Catherine E. Nicholson, Andrew Beeby, Richard Gameson

It is not every issue that one of our articles starts with a quotation in medieval English, and it is appropriate as two of our articles cover the use of spectroscopy in cultural heritage. This is yet another field where the rich information provided by spectroscopy, along with its non-destructive nature (for many techniques), portability and ability to generate chemical images make it the answer to many questions. Kate Nicholson, Andrew Beeby and Richard Gameson are responsible for the medieval English at the start of their article “Shedding light on medieval manuscripts”. They describe the general use of Raman spectroscopy for the analysis of historical artefacts, and, in particular, their work on medieval European manuscripts and 18th century watercolour pigments. They stess the importance of checking the actual laser power density to avoid damage to priceless artefacts.

Article  |  Issue 28/4 (2016)

On-line monitoring for improved wastewater system management: applications of ultraviolet/visible spectroscopy

Rita S. Brito, Rita Ribeiro, Tatiana Arriaga, Catarina Leitão, Nìdia D. Lourenço, Filipa Ferreira, Helena M. Pinheiro

To ensure that the removal and treatment of our sewerage meets increasingly high standards, it is important to be able to monitor the water online both to provide timely information and also to establish changing patterns over days, weeks and seasons. In their article “On-line monitoring for improved wastewater system management: applications of ultraviolet/visible spectroscopy”, Rita Brito, Rita Ribeiro, Tatiana Arriaga, Catarina Leitão, Nìdia Lourenço, Filipa Ferreira and Helena Pinheiro demonstrate the value of on-line UV/vis spectroscopy for wastewater quality monitoring in decentralised wastewater treatment and for spectral on-line monitoring of key quality parameters at the inlet to wastewater treatment plants.

Article  |  Issue 27/6 (2015)

Automated detection of counterfeit drugs using multimodal spectroscopy and advanced web-based software platforms

Maren Fiege, Sára Harkai, Diana Weigel, Michael Pütz, Hans Meyer, Heinz Pritzke, Sabine Neuberger, Christian Neusüß, Eva Woltmann, Carolin Huhn, Andrey Bogomolov, Björn Fähler, Klaus Schürmann

In this Tony Davies Column, we learn about “Automated detection of counterfeit drugs using multimodal spectroscopy and advanced web-based software platforms”. The German authorities have commissioned the development of a multi-modal, transportable inspection system, including intelligent data processing and evaluation, for fast spectroscopic recognition of illicit drugs and counterfeit medicines. This is described in the column.

Tony Davies Column  |  Issue 27/4 (2015)

Broadband photon time-of-flight spectroscopy as a prospective tool in biomedicine and industrial process and quality control

Dmitry Khoptyar, Sören Johansson, Staffan Strömblad, Stefan Andersson-Engels

The analysis of turbid samples is increasingly important, not least due to their widespread occurrence in natural samples. Dmitry Khoptyar, Sören Johansson, Staffan Strömblad and Stefan Andersson-Engels show “Broadband photon time-of-flight spectroscopy as a prospective tool in biomedicine and industrial process and quality control”. The authors describe their recent development of a broadband spectrometer for evaluation of absorption and scattering spectra of very diverse turbid materials in the visible and close-near infrared (NIR) regions and its application with milk, cheese and paper samples.

Article  |  Issue 26/3 (2014)

New broadband high-resolution ozone absorption cross-sections

Anna Serdyuchenko, Victor Gorshelev, Mark Weber, John P. Burrows

With the threat of climate change, understanding the workings of our atmosphere is of crucial importance. Ozone is the most important trace gas in the stratosphere and troposphere and it is monitored by both satellite-borne and ground-based instruments. Accurate knowledge of ozone absorption cross-sections is vital for this work and described in this article.

Article  |  Issue 23/6 (2011)

Liquid-phase analytical applications of UV-visible broadband cavity-enhanced absorption spectroscopy (BBCEAS)

Meez Islam, L. Nitin Seetohul, Noora Qas Nouna, Zuzana Bajuszova, Zulf Ali

BBCEAS is a new cavity-based absorption technique that uses broadband sources rather than lasers. This offers potential improvements in signal-to-noise but often lower spectral resolution compared to techniques where the laser wavelength is scanned. The article concentrates on liquid-phase applications, an interesting new area since most cavity-based absorption studies have been performed on gas-phase species up to now.

Article  |  Issue 23/2 (2011)

The use of aquatic mosses and spectrophotometry to monitor trace element pollution in Italy

Mattia Cesa

The intense development of industrial and urban areas in the absence of accurate measures to control pollution sources is often the cause of several environmental problems: dispersed and undetected chemical waste problems, in particular trace elements such as heavy metals, may cause freshwater, soil and water-table contamination. Such events are rarely detectable by sporadic analyses on water samples, since trace element concentrations are often below the instrumental detection limits and/or quickly change in space and time.

Article  |  Issue 22/1 (2010)

Shedding light on evidence: forensic applications of UV/visible spectroscopy

Craig Adam

This short review shows that UV/visible spectroscopy plays a key role in the discrimination of colour in the forensic analysis of fibres and inks. The application of chemometrics, however, is vital in many cases to enhance such discrimination and to put it on a quantitative basis so providing objective justification for the conclusions of the analyst.

Article  |  Issue 21/2 (2009)

Exploding the myths: an update on UV-visible spectrometry

Christopher Burgess, John Hammond

Christopher Burgess

Burgess Analytical Consultancy Limited, “Rose Rae”, The Lendings, Startforth, Barnard Castle, Co. Durham, DL 12 9AB, UK

John Hammond

Starna Scientific Ltd, 52–54 Fowler Road, Hainault Business Park, Hainault, Essex, IG6 3UT, UK/p>

QM Column  |  Issue 21/1 (2009)

Standards for the 21st century; establishing trust in measurement

Christopher Burgess, John Hammond

As the column title rightly suggests Quality does Matter. The authors look at the major changes that have taken place over the last 50 years in four key areas: The National Metrology Institutes (NMIs), the instrument manufacturers, the user base and the globalisation of regulation through international regulatory bodies.

QM Column  |  Issue 20/5 (2008)

Combined infrared and visible spectroscopic ellipsometry study of thin polymer layers

K. Hinrichs, K. J. Eichhorn

Thin polymer layers on solid substrates are of high technological importance due to their increasing potential for applications in electronics, sensors, nanotechnology and biotechnology. Appropriate characterisation methods are necessary for the design and analysis of devices made using such materials. This review article focuses upon presenting the many analytical possibilities for quantitative evaluation of the optical constants and thickness of polymer layers by combined application of spectroscopic ellipsometry (SE) in the visible (vis) and infrared (IR) spectral range.

Article  |  Issue 19/6 (2007)

UV/vis reflectance spectroscopy reveals the changes in fibre chemistry during ageing

Anna-Stiina Jääskeläinen, Tiina Liitiä

UV/vis reflection spectroscopy is a practical method to investigate pulp ageing, especially when reflectance spectra are converted to absorbance (k/s) spectra. Even if detailed reaction paths cannot be solved with this technique alone, it provides a very fast and simple method to study the changes in the concentrations of certain important pulp components during ageing. In addition, the concentrations of these components have been studied also in other pulp processes, such as mechanical and chemical pulp bleaching.

Article  |  Issue 19/5 (2007)

Real-time detection of possible harmful events using UV/vis spectrometry

G. Langergraber,a J. van den Broeke,b,* W. Lettlb and A. Weingartnerb

aInstitute for Sanitary Engineering and Water Pollution Control, BOKU - University of Natural Resources and Applied Life Sciences, Vienna, Muthgasse 18, A-1190 Vienna, Austria. E-mail: [email protected]

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On-line and in situ UV/vis spectroscopy for multi-parameter measurements: a brief review

Joep van den Broeke, Günter Langergraber, Andreas Weingartner

As the first compact on-line instruments for use in the field have been on the market for several years, this article reviews their capabilities and applications.

Article  |  Issue 18/4 (2006)

Traceable certified reference materials (CRMs) in far-ultraviolet spectrophotometry

John P. Hammond

Analytical Products, Optiglass Ltd, Hainult, Essex, UK. E-mail: [email protected]

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Vacuum-UV chemical physics in the gas phase using synchrotron radiation

Richard P. Tuckett

School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK

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Study of the evolution of colour during the maceration process of cherries in liquor: an application of visible spectroscopy

Gabriel Pinto and Isabel Paz

Departamento de Ingeniería Química Industrial y del Medio Ambiente, E.T.S.I. Industriales, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, 28006 Madrid, Spain

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Port wine spectral monitoring

Luis Oliveira and Manuel Pais Clemente

CETO – Centro de Ciências e Tecnologias Ópticas, Rua Caldas Xavier, Nº38, 6º E, 4150 Porto, Portugal. E-mail: [email protected]

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