Analysis of Polychlorinated Quaterphenyl in Yusho Diagnosis from 2014 to 2016

Concentration of polychlorinated quaterphenyl (PCQ) in blood is an important chemical diagnostic standard in Yusho. In this study, we examined improvement of analytical method, and blood analysis was performed using this method. New method made it possible to analyze more quickly than our usual method. During the period of 2014 to 2016, a total of 143 bloods PCQ were analyzed. As a result, PCQ was detected from a total of 19 persons, and the range of PCQ concentrations were 0.02-6.15 ppb. From the time course of the PCQ concentration determined in blood of Yusho patients, PCQ is found not to be eliminated than PCB. The concentration of PCQ is an important knowledge for diagnosis of Yusho-disease and it is thought that itʼs necessary to continuously analyze in the future