Improvement and evaluation of methods for sulfate analysis. Part II. Final report Oct 78-May 79
Technical Report
·
OSTI ID:6586106
Methods for extraction of sulfate from glass-fiber hi-vol and Teflon lo-vol samples were evaluated. Efficiencies were found to vary with sampling location up to 20%. Mechanical shaking in water at room temperature was significantly more efficient than ultrasonic or reflux techniques with hi-vol samples. While Teflon filters are not wet by water, pre-wetting of filters with methanol did not significantly enhance sulfate extraction. A turbidimetric sulfate method using SulfaVer IV was evaluated for ruggedness, precision and intermethod agreement. Its precision was at least equal to that of a conventional turbidimetric method, but its accuracy was somewhat less, especially at lower sulfate levels. The Dionex Model 10 ion chromatograph was evaluated for low level sulfate analysis using both a sample preconcentrator and large (0.5 ml) sample loop. The latter was the preferred technique for samples = or < 20 microgram/ml. Accuracy was within 15% in the range 2 to 20 microgram/ml with a median C.V. of 6.5% for 24 atmospheric samples collected with dichotomous samplers. Use of a sample pre-concentrator permitted analysis of samples containing < 1 microgram/ml sulfate.
- Research Organization:
- California Dept. of Health Services, Berkeley (USA)
- OSTI ID:
- 6586106
- Report Number(s):
- PB-80-185556
- Country of Publication:
- United States
- Language:
- English
Similar Records
Improvement and evaluation of methods for sulfate analysis. Final report, 1977-1978
A comparison of mass, lead, sulfate, and nitrate concentrations in a field study using dichotomous, size-selective, and standard hi-vol samplers
Evaluation of methods for measuring sulfate
Technical Report
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Sat Mar 31 23:00:00 EST 1979
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OSTI ID:5585321
A comparison of mass, lead, sulfate, and nitrate concentrations in a field study using dichotomous, size-selective, and standard hi-vol samplers
Journal Article
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Sun Feb 28 23:00:00 EST 1982
· J. Air Pollut. Control Assoc.; (United States)
·
OSTI ID:5181187
Evaluation of methods for measuring sulfate
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Wed Dec 31 23:00:00 EST 1975
· Am. Chem. Soc., Div. Environ. Chem., Prepr.; (United States)
·
OSTI ID:7305062
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400103* -- Radiometric & Radiochemical Procedures-- (-1987)
AIR FILTERS
AIR POLLUTION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM SULFATES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
EQUIPMENT
EXTRACTION
FILTERS
GAS ANALYSIS
NONDESTRUCTIVE ANALYSIS
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION
POLLUTION CONTROL EQUIPMENT
SEPARATION PROCESSES
SULFATES
SULFUR COMPOUNDS
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS
400103* -- Radiometric & Radiochemical Procedures-- (-1987)
AIR FILTERS
AIR POLLUTION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM SULFATES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
EQUIPMENT
EXTRACTION
FILTERS
GAS ANALYSIS
NONDESTRUCTIVE ANALYSIS
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION
POLLUTION CONTROL EQUIPMENT
SEPARATION PROCESSES
SULFATES
SULFUR COMPOUNDS
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS