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:
Nitrogen species in aqueous samples can be measured as:
Nitrogen species are mostly determined by spectrophotometric methods or by ion chromatography.
Sulfur compounds are usually measured as: