%0 Journal Article %T Carbon nanotube assisted sol-gel based hollow fiber solidphase microextraction combined with pre-heating injectionhigh performance liquid chromatography as a novel sample preparation method for determination of nitroaromatics %A Mazyar Ahmadi Golsefdi %A Zarrin Es’haghi %A Sarafraz Yazdi, Ali %J Sample Preparation %@ 2299-677X %D 2013