experts from cttc attending iso/tc38/wg22 meeting
iso/tc38/wg22 meeting was held in spain in march, 2010. as chinese experts, ms. zheng yuying and ms. zhu ying from cttc attended the meeting. it was discussed on the results of comparison tests in more than 10 labs for determination of phthalates according to en 15777, cpsc-ch-c1001-09.1, pr cen iso/tr 16181 and the draft from china. china proposed that ultrasonic wave extraction has many advantages, e.g. simple operation, short time, efficient extraction, etc. which is recognized by the foreign experts.