The OMRL provides a variety of laboratory services and support to regional and national projects in the analysis of organic matter using the latest methods in absorbance and fluorescence spectroscopy along with standard measurement of total dissolved organic carbon and nitrogen concentration (DOC and TDN, respectively).
| Matrix | Analyte common name | NWIS name | NWIS parameter code | NWIS method code | Standard achievable range | Method reference | Method tool | |
|---|---|---|---|---|---|---|---|---|
| CAWSC SOP | Original | |||||||
| Water (filtered) | DOC | Organic carbon, water, filtered, milligrams per liter | 00681 | 00121 or 00123 | 0.3 - 4.0 mg/L, higher concentration samples can be diluted | CAWSC SOP C1.DOM | Bird et al., 2003; EPA 415.3 rev 1.2 | Shimadzu TOC VCSH high temp combustion |
| Water (filtered) | DIC | Dissolved inorganic carbon, water, filtered, milligrams per liter | 00691 | IR006 | 0.5 - 50.0 mg/L, higher concentration samples can be diluted | Breitmeyer and others, 2018 | Clesceri and others, 1998 | Shimadzu TOC-L high temp combustion |
| Water (filtered) | TDN | Total nitrogen, water, filtered, milligrams per liter | 00602 | PCL01 | 0.15 - 2.0 mg/L, higher concentration samples can be diluted | CAWSC SOP C1.DOM | Merriam et al., 1996 | Shimadzu TOC-L high temp combustion |
| Water (filtered) | DOM Absorbance (250-800 nm) | NA (full scans not available on NWIS) | various | ABS01 | 0 - 3.0 cm-1 at 254 nm, higher absorbance samples are diluted | Hansen et al., 2018 | Hansen et al., 2018 | Horiba Scientific Aqualog |
| Water (filtered) | DOM Fluorescence (Ex200-Ex400, Em240-Em600) | NA (full escitation emission matrices not available on NWIS) | various | ABS03 (10x5) ABS04 (5x2) ABS (2x1) | samples with absorbance > 0.3 cm-1 at 250 nm are diluted | Hansen et al., 2018 | Hansen et al., 2018 | Horiba Scientific Aqualog |
| Water (unfiltered) | SPM | Suspended solids | 00530 | GRV48 | >1 mg/L, variable based on volume | CAWSC SOP B1.SPM | Gray et al., 2000 | gravimetric, freeze dried |
The OMRL provides a variety of laboratory services and support to regional and national projects in the analysis of organic matter using the latest methods in absorbance and fluorescence spectroscopy along with standard measurement of total dissolved organic carbon and nitrogen concentration (DOC and TDN, respectively).
| Matrix | Analyte common name | NWIS name | NWIS parameter code | NWIS method code | Standard achievable range | Method reference | Method tool | |
|---|---|---|---|---|---|---|---|---|
| CAWSC SOP | Original | |||||||
| Water (filtered) | DOC | Organic carbon, water, filtered, milligrams per liter | 00681 | 00121 or 00123 | 0.3 - 4.0 mg/L, higher concentration samples can be diluted | CAWSC SOP C1.DOM | Bird et al., 2003; EPA 415.3 rev 1.2 | Shimadzu TOC VCSH high temp combustion |
| Water (filtered) | DIC | Dissolved inorganic carbon, water, filtered, milligrams per liter | 00691 | IR006 | 0.5 - 50.0 mg/L, higher concentration samples can be diluted | Breitmeyer and others, 2018 | Clesceri and others, 1998 | Shimadzu TOC-L high temp combustion |
| Water (filtered) | TDN | Total nitrogen, water, filtered, milligrams per liter | 00602 | PCL01 | 0.15 - 2.0 mg/L, higher concentration samples can be diluted | CAWSC SOP C1.DOM | Merriam et al., 1996 | Shimadzu TOC-L high temp combustion |
| Water (filtered) | DOM Absorbance (250-800 nm) | NA (full scans not available on NWIS) | various | ABS01 | 0 - 3.0 cm-1 at 254 nm, higher absorbance samples are diluted | Hansen et al., 2018 | Hansen et al., 2018 | Horiba Scientific Aqualog |
| Water (filtered) | DOM Fluorescence (Ex200-Ex400, Em240-Em600) | NA (full escitation emission matrices not available on NWIS) | various | ABS03 (10x5) ABS04 (5x2) ABS (2x1) | samples with absorbance > 0.3 cm-1 at 250 nm are diluted | Hansen et al., 2018 | Hansen et al., 2018 | Horiba Scientific Aqualog |
| Water (unfiltered) | SPM | Suspended solids | 00530 | GRV48 | >1 mg/L, variable based on volume | CAWSC SOP B1.SPM | Gray et al., 2000 | gravimetric, freeze dried |