Abstract: A composition and method of arresting the flow of blood and other protein containing body fluids flowing from an open wound and for promoting wound healing. In the method, a substantially anhydrous compound of a salt ferrate is provided for a unique use which will hydrate in the presence of blood and body fluid to produce Fe+++ thereby promoting clotting when applied to the wound for a time sufficient to arrest substantial further blood and other body fluid flow from the wound. The compound is formed of a salt taken from the group consisting of H, Li, Na, K, Rb, Cs and Fr. However, to decrease or eliminate stinging sensation, the compound may be formed having a salt taken from the group consisting of Be, Mg, Ca, Sr, Ba, Ra, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, Bi, Al, As, NH4 and N(C4H9)4.

Abstract: In an analytical method for determining the presene or concentration of analyte in a solution comprising detecting a dissolved detectable substance in solution by passing a solution containing a detectable substance through a detection device for determining the presence of concentration of detectable substance in the solution, the improvement including mixing the solution with one or more particulate reagents to form a suspension, thereby modifying the solution to yield a concentration of total detectable substance which correlates with the concentration of original analyte, and passing the solution through the detecting device. The particles can be used to replace an analyte with a detectable substance or an intermediate which can be reacted in solution to form a detectable substance. Alternatively, the particles can be used to suppress or remove an interfering substance.