Patent ID: 7112448
Filing Date: 2006-09-26
Classification: G01N,Y10T

Abstract:
1. A method of determining a concentration of an aldehyde in a test sample which is higher, equivalent or lower than a point of interest of the aldehyde wherein the point of interest is an effective concentration of the aldehyde comprising the steps of: (a) reacting the aldehyde in the test sample with an amount of MBTH to produce an azine, wherein said amount is the amount of MBTH that reacts with the aldehyde to the point of interest; (b) producing a first color if the concentration of said aldehyde is higher or equivalent to the point of interest; or (c) oxidizing any unreacted MBTH; (d) reacting the azine and any oxidized MBTH produced in step (c) to produce a second color different from the first color, the second color being indicative that the concentration of said aldehyde is lower than the point of interest; (e) observing an ending color in the test sample comprised of the first color and second colors; and (f) determining whether the effective concentration of aldehyde is present in the test sample based upon the ending color of in the test sample.