Carbon, Nitrogen, & Sulfur Analysis « Center for Applied Isotope Studies (CAIS)

Analysis of carbon, sulfur and nitrogen often provide significant characteristics to environmental samples.

Dissolved carbon can be determined using a Shimadzu TOC-5050A Total Organic Carbon Analyzer. Analysis is based on ignition of micro liter volumes of the sample at 700 °C into carbon dioxide that is measured on line by dedicated infra-red cell. The following forms of carbon can be analyzed:

Total dissolved inorganic carbon
Total dissolved carbon
Total non-purgable carbon
Other forms of carbon such as total dissolved organic and purgable carbon are obtainable by difference.

Nitrogen species in aqueous samples can be measured as:

Total Kjeldahl N (TKN)
Ammonia N (NH4-N)
Nitrite N (NO2-N)
Nitrate N (NO3-N)

Nitrogen species are mostly determined by spectrophotometric methods or by ion chromatography.

Sulfur compounds are usually measured as:

Sulfide by spectrophotometric methods
Sulfite, thiosulfate and sulfate by ion chromatography
Persulfate by redox reactions

Analytical Fees Chart

Carbon, Nitrogen & Sulfur Analysis	Price
Carbon, nitrogen and sulfur on solid samples
Total carbon and nitrogen	$15
Total carbon, nitrogen and sulfur	$20
Separate inorganic carbon measurement	$15
Soluble carbon (liquid samples, Shimadzu DOC analyzer)
Total dissolved carbon	$20
Total inorganic dissolved carbon	$20
Total dissolved organic carbon (subtraction procedure)	$20
Spectrophotometric analysis for either:
Soluble ammonia, nitrite, nitrate or phosphate	$10

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