Patent ID: 6136608
Filing Date: 2000-10-24
Classification: G01N,Y10T

Abstract:
A method for analyzing a concentration of formaldehyde in air, comprising:passing a given amount of said air through a collecting vessel comprising a given amount of an alkaline solution, said collecting vessel being filled with said given amount of said alkaline solution before passing said given amount of said air;filling a given amount of an AHMT reagent into said collecting vessel and leaving said reagent in said collecting vessel for a given period of time;using a standard color solution for calibrating an indication value of an absorptiometer to a predetermined value;adding a given amount of KIO.sub.4 to said collecting vessel; andsetting said collecting vessel in said absorptiometer to detect said formaldehyde concentration from a value of the indication value of said absorptiometer,wherein said concentration of formaldehyde is directly indicated by the value of the indication value of said absorptiometer.