Total Organic Carbon
Total organic carbon (TOC) is the amount of carbon bound in an organic compound and is often used as a non-specific indicator of water quality or cleanliness of pharmaceutical manufacturing equipment.
A typical analysis for TOC measures both the total carbon present and the so-called "inorganic carbon" (IC), the latter representing the content of dissolved carbon dioxide and carbonic acid salts. Subtracting the inorganic carbon from the total carbon yields TOC. Another common variant of TOC analysis involves removing the IC portion first and then measuring the leftover carbon. This method involves purging an acidified sample with carbon-free air or nitrogen prior to measurement, and so is more accurately called non-purgeable organic carbon (NPOC).
Read more about Total Organic Carbon: Measurement, Analyzers, Applications
Famous quotes containing the words total and/or organic:
“The word infant derives from Latin words meaning “not yet speaking.” It emphasizes what the child cannot do and reflects the baby’s total dependence on adults. The word toddler, however, demonstrates our change in perspective, for it focuses on the child’s increased mobility and burgeoning independence.”
—Lawrence Kutner (20th century)
“A special feature of the structure of our book is the monstrous but perfectly organic part that eavesdropping plays in it.”
—Vladimir Nabokov (1899–1977)