Evaluation of methods for measuring sulfate
Conference
·
· Am. Chem. Soc., Div. Environ. Chem., Prepr.; (United States)
OSTI ID:7305062
A discussion of a program being conducted to evaluate and compare 5 wet chemical methods for determination of sulfate in atmospheric samples. The methods include BaCl/sub 2/ turbidimetric, automated methylthymol blue (MTB), AIHL microchemical, modified Brosset, and barium chloranilate. Parameters being evaluated are: equivalency of methods, analytical precision and accuracy, and the influence of potential interferents. Samples were collected with both high and low volume samplers in 4 different locations. Errors such as influence of filter medium, sampling volume and particle size are being evaluated. The first 4 wet methods yielded nearly equivalent results, indicating that the choice of method can be based on cost factors and convenience. Results from analysis of filters from low volume samplers revealed differences ranging from a factor of 2 per individual samples to 1.5 when pooled by sampling site (shown in a Table).
- Research Organization:
- Environmental Protection Agency, Research Triangle Park, NC
- OSTI ID:
- 7305062
- Conference Information:
- Journal Name: Am. Chem. Soc., Div. Environ. Chem., Prepr.; (United States) Journal Volume: 16:1
- Country of Publication:
- United States
- Language:
- English
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