Reagents, Clinical Chemistry, Rapid Test, Chemical Agent
Definition : Rapid-test clinical chemistry reagents to detect and identify hazardous liquid and/or aerosol chemicals (i.e., chemical agents) such as nerve and blister agents. These reagents typically consist of several (e.g., three) indicator dyes suspended in cellulose fibers (i.e., a paper matrix). Some paper matrixes change to only one color in the presence of any of the agents (e.g., M9 paper), while other reagents (e.g., M8 and three-way paper) change color according to the agent, permitting agent identification (they work in a manner similar to that of pH paper strips). Typically, nerve agents of the G series turn the papers yellow, VX nerve agents turn them dark green, and blister agents turn them red. These paper-matrix reagents are available either in booklets containing many (e.g., 25) perforated sheets of a small size (e.g., 5 x 7.5 cm/2 x 3 inch) or in rolls; roll papers (e.g., M9 paper) and some booklet papers (e.g., three-way papers) include adhesive backing. The usual procedure is to expose the paper to a surface suspected of contamination or to the agent itself by wiping it with the paper; some detection papers can be attached to a surface that may be exposed in the future (e.g., clothing, equipment). Rapid-test chemical agent reagent results should be verified because the papers also change color when contacted by interferents such as sodium hydroxide and petroleum products (e.g., brake fluid, antirepellents).
Entry Terms : "Strips, Chemical Agent Detection" , "Chemical Agent Detection Strips" , "Blister Chemical Agent Detection Strips" , "Nerve Chemical Agent Detection Strips" , "Three-Way Chemical Agent Detection Strips" , "M9 Chemical Agent Detecton Strips" , "M8 Chemical Agent Detection Strips"
UMDC code : 20513