INDICATIVE TESTING AGENT FOR DETERMINING TRACE AMOUNTS OF SUBSTANCES Russian patent published in 2011 - IPC G01N31/22 

FIELD: chemistry.

SUBSTANCE: invention can be used in laboratory practice and field conditions for rapid determination of inorganic ions and organic substances in the surrounding medium, processing facilities and organisms. The indicative testing agent consists of an absorbent reagent indicator zone docked by its opposite edges with absorbent filter elements, and placed between transparent stoppers, wherein at least one of the absorbent filter elements are saturated with a reagent composition, wherein the absorbent filter elements are in form of polygons and are joined with the absorbent reagent indicator zone on their two sides, where on the output side of the indicator zone, the absorbent element is docked by its smaller base so that the cross section, perpendicular the direction of flow of the analysed sample increases as distance from the docking point increases.

EFFECT: high sensitivity and information content of the determination process.

4 cl, 6 ex, 2 tbl, 2 dwg