Precursor
Meaning, Term, and Glossary Definition - What is Precursor?
In photochemistry, a compound antecedent to a pollutant. For example, volatile organic compounds (VOCs) and nitric oxides of nitrogen react in sunlight to form ozone or other photochemical oxidants. As such, VOCs and oxides of nitrogen are precursors.
Try searching Precursor across the entire website.
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
<-- Search again
View EPA Data Qualifier (Flag) Abbreviations...

Suggestions? This Laboratory Terms page continues to expand and improve. If you have suggestions for improvement, we would enjoy hearing from you. Please contact the webmaster here.


NEW! Allowable Levels Established for DEHP in Bottled Water
Vapor Intrusion Investigations: Air Sampling Tips for Meeting Data Quality Objectives
Incremental Sampling Methodology