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Investigation of Approaches for the Determination of Inorganic Chloramines in Workplace Air.

PB93234474

Publication Date	1993
Personal Author	Lorberau, C.
Page Count	54
Abstract	Direct reading instrument methods for determining the concentration of inorganic chloramines in the air at work sites were investigated. Infrared spectrometry allowed the detection of gaseous nitrogen-trichloride in atmospheres low in carbon-dioxide. Under comparable conditions it was not possible to identify either monochloramine or dichloramine. Under atmospheric levels of carbon-dioxide, the nitrogen-trichloride absorbance band was completely obscured by carbon-dioxide sidebands. Although detector tubes for chlorine reacted with nitrogen-trichloride, the presence of trace amounts of molecular chlorine interfered, making the use of detector tubes unworkable. Mass spectrometry with selected ion monitoring detected nitrogen-trichloride. The presence of amines did not seriously affect the mass spectral intensities of nitrogen-trichloride. Even after a 4 hour period the introduction of primary amines did not appreciably change the mass spectral intensity. The author concludes that mass spectrometry appears to be the technique to use for the analysis of nitrogen-trichloride.
Keywords	Chloramines Air pollution detection Measuring instruments Air pollution monitors Chemical analysis Infrared spectrometers Mass spectrometers Nitrogen compounds Carbon dioxide Amines Nitrogen trichloride Monochloramine Dichloramine
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	68A - Air Pollution & Control 99A - Analytical Chemistry
Corporate Authors	National Inst. for Occupational Safety and Health, Cincinnati, OH. Div. of Physical Sciences and Engineering.
Document Type	Technical Report
NTIS Issue Number	199324

Investigation of Approaches for the Determination of Inorganic Chloramines in Workplace Air.

Investigation of Approaches for the Determination of Inorganic Chloramines in Workplace Air.
PB93234474

Publication Date	1993
Personal Author	Lorberau, C.
Page Count	54
Abstract	Direct reading instrument methods for determining the concentration of inorganic chloramines in the air at work sites were investigated. Infrared spectrometry allowed the detection of gaseous nitrogen-trichloride in atmospheres low in carbon-dioxide. Under comparable conditions it was not possible to identify either monochloramine or dichloramine. Under atmospheric levels of carbon-dioxide, the nitrogen-trichloride absorbance band was completely obscured by carbon-dioxide sidebands. Although detector tubes for chlorine reacted with nitrogen-trichloride, the presence of trace amounts of molecular chlorine interfered, making the use of detector tubes unworkable. Mass spectrometry with selected ion monitoring detected nitrogen-trichloride. The presence of amines did not seriously affect the mass spectral intensities of nitrogen-trichloride. Even after a 4 hour period the introduction of primary amines did not appreciably change the mass spectral intensity. The author concludes that mass spectrometry appears to be the technique to use for the analysis of nitrogen-trichloride.
Keywords	Chloramines Air pollution detection Measuring instruments Air pollution monitors Chemical analysis Infrared spectrometers Mass spectrometers Nitrogen compounds Carbon dioxide Amines Nitrogen trichloride Monochloramine Dichloramine
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	68A - Air Pollution & Control 99A - Analytical Chemistry
Corporate Authors	National Inst. for Occupational Safety and Health, Cincinnati, OH. Div. of Physical Sciences and Engineering.
Document Type	Technical Report
NTIS Issue Number	199324