Patent ID: 7118916

Claim:
A method for characterizing reaction end point, comprising: (a) initiating a chemical reaction including an observable A indicative of extent of reaction, (b) measuring first, second and third values A 1 , A 2 , and A 3 for said observable, at times t 1 , t 2 and t 3 respectively wherein the time interval t 2 −t 1 is substantially equal to the time interval (t 3 −t 2 ); and (c) determining an endpoint value A ∞ for said observable according to the relationship A ∞ ≅ A 2 - ( A 3 - A 1 ) 2 4 ⁢ ( A 3 - 2 ⁢ ⁢ A 2 + A 1 ) .