ENVIRONMENTAL METHODS LIST
USEPA Rev 10 Method Detection Limits are calculated using USEPA procedure 40 CFR, Part 136, Appendix B
| ANALYTE |
METHOD DESCRIPTION |
METHOD NUMBER |
METHOD DETECTION LIMIT |
EQUIVALENCE |
| PHOSPHORUS, Total (TKP) |
Kjeldahl digests (Hg catalyst) are reacted with acidic molybdate/antimony with ascorbic acid reduction |
EPA-120-A Rev 6 |
0.007 mg P/L (Range: 0.04 to 3.2 mg P/L) |
EPA 365.4 |
PHOSPHORUS,
Total Kjeldahl (TKP) |
Kjeldahl digests (Cu catalyst) are reacted with acidic molybdate/antimony with ascorbic acid reduction. Method range depends on digestion protocol |
| EPA-135-A Rev 2 |
| EPA-138-A |
|
| 0.009 mg P/L (Range: 0.04 to 3.2 mg P/L) |
| TBD mg P/L (Range: 0.05 to 3.0 mg P/L) |
|
N/A |
| SILICA (Reactive silica) |
Acidic molybdate, no reduction
(molybdo-silicic acid) |
EPA-121-A Rev 2 |
0.1 mg/L (Range: 0.25 to 25 mg/L) |
Std. Methods 4500-SiO2 C
(20th) |
| SILICA (Reactive silica) |
Acidic molybdate with ANSA reduction (silico-molybdenum blue) |
EPA-122-A Rev 6
|
0.025 mg/L (Range: 0.1 to 10 mg/L) |
Std. Methods 4500-SiO2 D
(20th) |
| SULFATE |
Barium chloride turbidimetric method |
EPA-123-A Rev 5 |
1.0 mg/L (Range: 5 to 40 mg/L) |
ASTM D516-90, 02 |
SEAL Analytical is continually developing methods. Please note that others may exist.
If you do not see your chosen method on this list, please consult your SEAL Analytical Technical Support Team.
Copyright © 2008 SEAL Analytical
Reproduction or distribution of this document is expressly forbidden without written permission from
SEAL Analytical or one of its authorized distributors