Fourier transform infrared spectroscopy (FTIR) ammonium sulfate analysis on teflon air filters
Conference
·
OSTI ID:5625978
This paper reports on the improvement and automation of a method of analyzing ammonium sulfate particles collected on Teflon membrane filters. The filters were analyzed by transmission measurements using Fourier transform infrared spectroscopy after collection with dichotomous air samplers. The spectra of the blank filters are subtracted from the spectra of the loaded filters and an integration of the 1000 to 1135 cm/sup -1/ absorbance band for sulfate leads to a lower limit of detection of 0.2 ..mu..g/cm/sup 2/ on 37 mm 2 micron Teflon filters. This corresponds to an ambient concentration of ..mu..g/m/sup 3/ for a 24 hr, 21.6 m/sup 3/ air sample. Ammonium sulfate particulate standards were prepared by sampling the output of a laboratory particle generator. Concentrations were then determined by x-ray fluorescence analysis. An automatic sample changer was constructed which accepts the filter carousel from a Sierra/ Anderson model 245 automated dichotomous sampler. The sample changer is controlled by the FTIR computer. The analysis is nondestructive, automated, and requires no sample preparation.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5625978
- Report Number(s):
- LBL-21449; CONF-860426-5; ON: DE86012497
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR FILTERS
AMMONIUM COMPOUNDS
AMMONIUM SULFATES
EQUIPMENT
FILTERS
FLUORINATED ALIPHATIC HYDROCARBONS
FOURIER TRANSFORM SPECTROMETERS
HALOGENATED ALIPHATIC HYDROCARBONS
INFRARED SPECTROMETERS
MATERIALS
MATERIALS TESTING
MEASURING INSTRUMENTS
NONDESTRUCTIVE TESTING
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLLUTION CONTROL EQUIPMENT
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
SPECTROMETERS
SPECTROSCOPY
SULFATES
SULFUR COMPOUNDS
SYNTHETIC MATERIALS
TEFLON
TESTING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR FILTERS
AMMONIUM COMPOUNDS
AMMONIUM SULFATES
EQUIPMENT
FILTERS
FLUORINATED ALIPHATIC HYDROCARBONS
FOURIER TRANSFORM SPECTROMETERS
HALOGENATED ALIPHATIC HYDROCARBONS
INFRARED SPECTROMETERS
MATERIALS
MATERIALS TESTING
MEASURING INSTRUMENTS
NONDESTRUCTIVE TESTING
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLLUTION CONTROL EQUIPMENT
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
SPECTROMETERS
SPECTROSCOPY
SULFATES
SULFUR COMPOUNDS
SYNTHETIC MATERIALS
TEFLON
TESTING