Abstract
An amendment to the Japanese Leaching Test (JLT13) was carried out in February 2013. Despite requests to adopt a method that uses an ion chromatograph (IC) system, this spectrophotometric method, which uses mercury-containing reagents, was adopted instead as a test method for organochlorine compounds. The reason why the IC method was rejected is because it cannot measure the sample solution without macrodilution and requires nitric acid in order to neutralize the sodium hydrate generated from a surplus of sodium biphenyl. We, however, have been successful in neutralizing using a carbonic acid that is easily removed by the CO2 suppressor. The sample solution can be measured using the IC system without macrodilution.
