absorption spectroscopy Articles

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Beginners Guide to Spectroscopy - Transmission

by Specac Limited  (Feb. 28, 2014)

This is the first part of our introduction to Spectroscopy, more can be found on our blog (http://specac.blogspot.co.uk). Introduction Transmission spectroscopy is the oldest and simplest technique for analysing samples in infrared. This ...

Characterizing natural dissolved organic matter in a freshly submerged catchment (Three Gorges Dam, China) using UV absorption, fluorescence spectroscopy and PARAFAC

by IWA Publishing  (Feb. 1, 2012)

This study applied parallel factor analysis (PARAFAC) to fluorescence excitation–emission matrices (EEMs) of natural water samples in a freshly submerged catchment in the upper reach of Three Gorges Dam (China). Two fluorescent natural dissolved organic matter (NDOM) components (humic/fulvic-like) were uncovered and were positively correlated with ...

Comparison of atomic absorption and fluorescence spectroscopic methods for the routine determination of urinary arsenic

by Springer  (Feb. 1, 2005)

Objective: Interpretation of urinary arsenic measurements is sometimes difficult because of the absorption of seafood that contains trimethylated arsenic forms (arsenobetaine and arsenocholine). The objective of this study was to develop a rapid and robust technique for the measurement of the sum of inorganic arsenic metabolites. Methods: ...

FTIR Spectroscopy

by CIC Photonics, Inc.  (Aug. 9, 2011)

Fourier Transform Infrared (FTIR) Spectroscopy bases its functionality on the principle that almost all molecules absorb infrared light. Only the monatomic (He, Ne, Ar, etc) and homopolar diatomic (H2, N2, O2, etc) molecules do not absorb infrared light. Molecules only absorb infrared light at those frequencies where the infrared light affects the ...

Wastewater salinity assessment using near infrared spectroscopy

by IWA Publishing  (Aug. 29, 2013)

The visible and near infrared spectroscopy is a fast and inexpensive non-destructive technique for the prediction of concentrations of salts in wastewater. Conventional chemical methods are usually used, which are very accurate, take more time and require special techniques for sampling, storing and pretreatment of wastewater. In this work we ...

Spectroscopic study of the interaction of heavy metals with organic acids

by Inderscience Publishers  (Nov. 6, 2008)

The ongoing progress in spectroscopic methods of analysis has resulted in a growing interest in the nature of pollutants and hence the possibility of controlling their levels in the environment. This paper describes a study of the fate of some pollutants in both soil and water at two selected areas in the north of Cairo, Egypt. Samples were ...

Application of surface complexation models to anion adsorption by natural materials

by John Wiley & Sons, Ltd.  (Mar. 11, 2014)

Various chemical models of ion adsorption will be presented and discussed. Chemical models, such as surface complexation models, provide a molecular description of anion adsorption reactions using an equilibrium approach. Two such models, the constant capacitance model and the triple layer model will be described. Characteristics common to all ...

Spectroscopic tools for remote sensing of greenhouse gases CH 4, CF 4 and SF 6

by Springer  (Feb. 7, 2003)

Abstract Highly symmetrical molecules such as CH 4, CF 4 or SF 6 are known to be atmospheric pollutants and greenhouse gases. High-resolution spectroscopy in the infrared is particularly suitable for the monitoring of gas concentration and radiative transfers in the earth's atmosphere. This technique requires extensive theoretical studies for the ...

Measurement of Cesium in Tap Water and Soil by Atomic Absorption Spectrometry

by Shimadzu Scientific Instruments Inc  (Nov. 19, 2012)

Recently, technologies that can efficiently remove radioactive cesium (chiefly Cs-137) from water and soil have been actively researched. The study and evaluation of these removal technologies can be conducted using Cs-133, an easy-to-handle, stable substance, yet chemically similar to Cs-137. Cesium can be analyzed using atomic absorption ...

Determination of macro, micro nutrient and trace element concentrations in Indian medicinal plants using instrumental neutron activation analysis and atomic absorption spectroscopy techniques

by Inderscience Publishers  (Mar. 5, 2010)

Specific parts (fruits and seeds) of different medicinal plants often used in Indian Ayurvedic system were analysed for 18 elements (K, Mn, Na, Fe, Zn, Cu, Co, Br, Sm, Cl, La, Al, Cr, Ca Cd, Ni, Pb and Hg) by employing instrumental neutron activation analysis (INAA) and atomic absorption spectroscopy (AAS) techniques. The samples were irradiated ...

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