METHOD AND APPARATUS FOR DETECTING NITROUS ACID ION

摘要

PURPOSE:To enable the detection and determination of NO<->2 in a liquid to be inspected accurately in a short time, by bringing a liquid being inspected in contact with a powder or particulate carrier layer supporting naphtyl ethylenediamine and sulfanylamide to to measure the possible coloring and the degree of coloring of the carrier layer. CONSTITUTION:A solution in which 5g of sulfanylamide and 5g of naphtyl ethylenediamine chlorate are dissolved into 100ml of water is mixed with 50g of a carrier such as active alumina and after the mixture is filtered, it is dried by evaporating water to support both reagents on the surface of carrier particles. The carrier 2 is placed into a glass tube 1 having a cotton 3 packed into the lower open end thereof to obtain an NO<->2 detector having the cotton 3 packed onto the carrier. The lower end of the tube 1 is immersed into a sample liquid to measured possible coloring (red) due to the NO<->2 ion in the water sucked up by a capillary phenomenon and the length of the colored layer 4. Thus, the concentration of an object in the sample in found from the relationship between the concentration and the length of the colored layer previously obtained with respect to the known concentration sample thereby enabling the measuring of NO<->2 handily as well as accurately.