| Analysis | Description | EPA method or other reference | Analyte |
Units |
MDL |
Typical Range |
| Anions | Anions via ion chromatography w/ suppressed conductivity. | Anions EPA #300.1 | Cl- |
mg Cl/L |
0.02 |
0 – 15 |
NO3 |
mg N/L |
0.002 |
0 – 3 |
|||
SO4 |
mg S/L |
0.04 |
0 – 8 |
|||
| Cations | Cations via ion chromatography and conductivity |
Proposed EPA method | Na |
mg Na/L |
0.1 |
0 – 15 |
K |
mg K/L |
0.05 |
0 – 7 |
|||
Mg |
mg Mg/L |
0.1 |
0 – 7 |
|||
Ca |
mg Ca/L |
0.1 |
0 – 10 |
|||
| DOC | High Temperature Catalytic Oxidation (HTCO) |
EPA 415.1 | DOC |
mg C/L |
0.05 |
0 - 20 |
| TDN | HTCO with
chemiluminescent N detection |
Merriam et al, 1996 | TDN |
mg N/L |
0.09 |
0 - 10 |
| DOC and TDN | HTCO with chemiluminescent N detection |
EPA 415.1 and Merriam et al, 1996 |
DOC and TDN |
mg C/L |
0.05 0.09 |
0 - 20 0 - 10 |
| Nitrate/Nitrite colorimetric NO3/NO2 | Automated Cd-Cu reduction | EPA 353.2 |
NO3/NO2 |
mg N/L |
0.005 |
0 - 10 |
| Ammonium colorimetric NH4 | Automated Phenate | EPA 350.1 | NH4 |
ug N/L |
5 |
0 - 200 |
| Soluble reactive Phosphorous colorimetric PO4 | Automated Ascorbic acid | EPA 365 |
PO4 |
ug N/L |
5 |
0 - 200 |
| Silica colorimetric | Automated Ascorbic/ANSA | EPA 370.1 | SiO2 |
mg SiO2/L |
0.01 |
0 - 40 |
| CHN on solid samples | Automated | Carbon, Nelson et al, 1996; Nitrogen, Bremner 1996 | C, H, N |
% and/or ug |
50 - 2000 ug C 10 - 500 ug N |
|
| Analysis | Description | EPA method or other reference | Analyte |
Units |
MDL |
Typical Range |