STUDIES ON MICROWAVE EXTRACTION OF PHTHALATE

• Main Authors: Yung-Hsuang Lin, 林永祥
• Other Authors: Ien-Whei Chen
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/82365722960990420864

碩士 === 大同大學 === 化學工程學系(所) === 97 === Currently the traditional examination method for phthalate (Government Announced Method CNS15138) uses the soxhlet extract method，which takes generally 8~16 hours for the process and use about 100ml ~ 250ml of extractive solvent。But there is no Government Announced Method for convenient microwave extract which only needs 5~10 minutes and use 10ml ~ 20ml of extractive solvent。This research developed the best microwave extract technology，which extract the forbidden phthalate materials hidden inside the plastic sample。This microwave extract technology method not only saves time，but also uses less solvents。The best conditions for microwave extract method are to discusses the extract time, the extractive solvent, and the influence on the parameters for the extract efficiency。After the best microwave extract condition is discovered，we use the Gas Chromatography/Mass Selective Detector to analyze the qualitative and quantitative analysis。 In this research, the best microwave extract condition is: 500W microwave power in temperature 100℃degree and 20mL of methyl alcohol and chloroform 1:2 solvents for 20 minutes extraction。 Afterwards we compare and analyze the standard sample with the traditionally extracted results。Standard sample reference value DBP、 BBP、DEHP、DNOP are 5.0ppm； DINP、 DIDP are 20.0ppm， the standard sample soxhlet extract obtained result respectively are: DBP 4.95 ppm, BBP 4.96 ppm, DEHP 4.94 ppm, DNOP 4.98 ppm，DINP 19.94 ppm，DIDP 19.96 ppm；The standard sample microwave extract obtained results respectively are：DBP 4.96 ppm，BBP 4.95 ppm，DEHP 4.96 ppm，DNOP 4.97 ppm，DINP 19.96 ppm，DIDP 19.95 ppm.。 In the end the experiment aimed at the revertex milk bottle and children building block these two types of items which sells in the market and can be easily put in the mouth。The experiment also tested the non-conductive skin of electric wires and imitation leather。The result showed highly concentrated phthalate content DINP 3712550ppm DIDP 30165ppm in the imitation leather, but found nothing in the revertex milk bottle and building block。But the electric wire protective skin also has the high phthalate to examine DEHP 1684ppm DINP 1597ppm。Therefore we can concluded that because imitation leather and electric wire skin only contacts the human skin and not swallowed, so when the manufacturer test and the phthalate materials they tent to not focus in these areas and thus not tested。