Table of Analysis Methods

Science Center Objects

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