Abstract
Off-taste of water extracted compounds from powder of polyolefin resin was studied． The water soluble compounds were extracted by mixing the resin powder with deionized water of equal quantity （w／w） and shaking for 24 hours at 25℃．The volatile compounds， collected into Tenax GC from the extract by flushing the extract with nitrogen gas， were analyzed with GC and GC-MS to determine the fifty five compounds as alcohols， aldehydes， ketones and esters． The volatile compounds， particularly oxidatively formed from the resins were ascertained to be responsible for the off-taste of the extract， since the off-taste intensity of the water from which the volatiles were liberated by nitrogen gas flushing was significantly reduced．
Reduction of the volatiles from the resin power by nitrogen gas flushing was effective to reduce the off-taste．
