Detection of poly(ethylene glycols) and related acidic forms in environmental waters by liquid chromatography/electrospray/mass spectrometry
Article Abstract:
Liquid chromatography/electrospray/mass spectrometry is a useful tool in the detection of poly(ethylene glycols) (PEGs) and other acidic forms in contaminated waters. There are no simple and effective methods available that can detect PEGs at trace levels. Analyte extracts from four water samples, which included groundwater, seawater, river water and sewage, were examined using the same instrumental arrangement made possible by the induced conversion of carboxylated PEGs into methyl esters. The method was able to detect even the smallest levels of PEG compounds at parts per trillion levels in marine waters and groundwaters.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Pesticide stability studies upon storage in a graphitized carbon black extraction cartridge
Article Abstract:
Different storage conditions were set for 34 pesticides taken in extracted form on a graphitized carbon black (GCB) cartridge to evaluate their stability. The most optimal conditions were generated by applying methanol washing and cartridge freezing to limit the GCB extraction's water content. Pesticides held under such conditions displayed greater stability properties compared to those in water storage at four degrees centigrade both with and without degradation inhibitors.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Real-time characterization of the organic composition and size of individual diesel engine smoke particles
Article Abstract:
Ion trap spectrometers are found to be viable tools in providing real time characterization of individual diesel engine smoke particles. MS/MS analysis were able to identify low mass polycyclic aromatic hydrocarbons (PAH) and high mass hydrogenated PAHs with experiments yielding mechanisms that may be used to determine the efficiency of combustion. The experiment was conducted using nebulized engine oil and diesel fuel for comparisons.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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