N-Nitrosodimethylamine - NIST Chemistry WebBook
View image of digitized spectrum (can be printed in landscape orientation). View spectrum image in SVG format. Download spectrum in JCAMP-DX format. on behalf of the United States of America. All rights reserved. DOW CORNING CORP. This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.
Decomposition of nitrosamines in aqueous monoethanolamine (MEA…
2014年12月1日 · In this work the destruction of two nitrosamines, NDELA (nitrosodiethanolamine) and NDMA (nitroso-dimethylamine), with UV-light is studied in a batch reactor at room temperature and at 45 °C. Additionally, the effect of UV-light on the degradation of …
An Organic Chemist’s Guide to N-Nitrosamines: Their Structure ...
2021年1月21日 · Nitrosamines in the air can coordinate to the Co(III) center through their oxygen (e.g., Chart 5, left side) and this interaction produces an increase in resistance. The sensor was found to be highly selective for the tested dialkylnitrosamines (NDMA, NDEA, and NDBA) over common volatile organic compounds, which produced significantly smaller ...
Only non-aromatic nitrosamines were examined. The infrared absorption spectra were determined by means of a Hilger H-800 double-beam spectrophotometer with sodium chloride optics. The solid substances were used in form of Nujol mulls, and, in the region of absorption of Nujol, as suspensions in triehlorobromomethane.
N-Nitrosodiethanolamine - an overview | ScienceDirect Topics
N-nitrosamines, organic compounds with a functional group N-N=O, are formed by reaction between amines or amine derivatives with nitrosating agents like nitrous acid, nitrites or nitrogen oxides. These compounds have carcinogen effects on animals and can be absorbed through the skin and accumulate in organs.
Risk assessment of N-nitrosodiethylamine (NDEA) and N ...
TEA and DEA concentrations ranged from N.D. to 860 μg/kg and N.D. to 26.22 μg/kg, respectively. The nitrite concentration (3-2250 mg/l), number of nitrosating agents to a maximum 5, and pH (3.93-10.09) were also assessed. The impact of N-nitrosamine formation on the levels of TEA, DEA, nitrite, and other nitrosating agents was also examined.
Vibration absorption spectra for nitrosamines are calculated using density function theory (DFT). Absorption spectra within the IR range of fre-quencies for electromagnetic-wave excitation, calculated using DFT, can be interpreted with respect to molecular structure. DFT calculated ab-
Sensitive and robust LC-MS method provides for the separation, identification, and quantification of nine N-nitrosamines in water. Extraction recoveries in drinking water and wastewater matrices ranged from 68% to 83% for eight of the nine target N-nitrosamines.
IR absorption spectra for isolated molecules of nitrosamines …
The DFT software GAUSSIAN was used for calculating the infrared (IR) spectra presented here. DFT calculated spectra can be used to construct templates, which are for spectral-feature comparison, and thus detection of spectral-signature features associated with target materials.
IR absorption spectra for isolated molecules of nitrosamines using ...
2020年4月23日 · Calculations are presented of vibrational absorption spectra for isolated molecules of nitorsamines using density function theory (DFT). These contaminants are among widely spread carcinogens in the environment of industrial countries.