An assessment Protocal of Ammonia Removal Efficacy for Air Purification Products

A device is designed to assess the ammonia removal effect of passive air purification products which derived the QB/T 2761-2006 Methods for determination of purificatory effect of indoor environment decontamination product. The device is composed of three parts: ammonia generator, ammonia removal device and ammonia collection device, which is made up of common laboratory equipment. The reagents used are common acid and alkali reagents in the laboratory. During the experiment, 5.0mL of 25% concentrated ammonia water is added to the ammonia generator as the ammonia source, and filter paper is used as the sample carrier. Take 3.0g sample and add it to the filter paper, after the ammonia is absorbed by the filter paper with the sample, the residual ammonia is collected and measured by acid-base titration. The ammonia removal efficacy of the sample is calculated by the ammonia absorption amount of the blank sample and the sample to be tested. This method has the characteristics of simple equipment, small area, toxic or harmful substance free,and fabulous accuracy. Four different samples were tested, and the results matched the standard method.