Where in SW-846 can I find a method for total organic carbon (TOC) in soil and other solid matrices?
There is no SW-846 method for TOC in soils. EPA does not have any regulatory requirements that govern the total organic carbon content of soils or solid matrices. Therefore, without a regulatory driver, there is no need for a method for TOC in soil in SW-846. Soil scientists have developed a variety of methods for TOC over the years. Some of them are based on titration of “easily oxidizable organic carbon,” while others involve the high temperature combustion of any organic carbon in the soil and measurement of the resulting carbon dioxide. If you need a method for TOC in soil, you should either consult the open soil science literature or check with the environmental regulatory agency in your state to see if they have a method of choice.
