Gas phase photolysis of methyl isothiocyanate
Article Abstract:
A study has been conducted to determine sunlight photolysis rates and products of methyl isothiocyanate (MITC) in the gas phase and compare them with those in the dark using Tedlar, borosilicate and quartz chambers, with xenon arc and sunlight as irradiation sources. Ratioing techniques were employed to analyze the effect of wall reactions and relate sorption of MITC with two compounds of similar vapor pressure. Results revealed a half life of 10-13 hours under xenon arc irradiation and slightly more than 24 hours under sunlight. Several photolysis products were observed including methyl isocyanate and methyl isocyanide.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Understanding the water quality of pit lakes
Article Abstract:
The rising number of deep pit metal mines has raised concerns over the environmental impact of the pit lakes that form when pit mines intersecting groundwater are eventually depleted and closed. Many pit lakes have been found to have subpar water quality, suggesting that the new lakes formed may adversely affect wildlife and proximate groundwater. Several states led by Nevada have responded by requiring mining companies to conduct geochemical modeling of the future water quality of pit lakes so that environmental risk can be estimated accordingly.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Misidentification of organophosphate esters during GC and GC/MS analysis
Article Abstract:
The effect of errors in a widely distributed mass spectral database and the instability of tetraethyl pyrophosphate (TEPP) standards on the accuracy in TEPP and triethyl phosphate analyses is investigated. The results showed that unstable TEPP standards caused inaccurate identification. It is suggested that neat TEPP standards and newly-diluted calibration standards be used instead to increase accuracy.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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