Estrogen equivalent concentration of 13 branched para-nonylphenols in three technical mixtures by isomer-specific determination using their synthetic standards in SIM mode with GC–MS and two new diasteromeric isomers
作者:Takao Katase、Keiji Okuda、Yun-Seok Kim、Heesoo Eun、Hideshige Takada、Taketo Uchiyama、Hiroaki Saito、Mitsuko Makino、Yasuo Fujimoto
DOI:10.1016/j.chemosphere.2007.09.049
日期:2008.2
9+/-0.3% to 3.0+/-0.2%. Additionally, structures of four new isomers of more than 1% portion present in a technical mixture were elucidated as two pairs of diastereomeric isomers: two types of 4-(3,4-dimethylheptan-4-yl)phenol (344NP) and those of 4-(3,4-dimethylheptan-3-yl)phenol (343NP). By estrogenic assay of 13 isomers with yeast estrogen screen system, the activity of 3E22NP was the highest, while
通过SIM的结构特异性离子m / z 135、149或163的合成标准品,使用GC-MS,通过合成标准物,在三种技术混合物中选择了13种支链对壬基酚(对-NP)异构体。在13种异构体中,有4种异构体,分别是4-(2,4-二甲基庚基-4-基)苯酚,4-(4-甲基辛基-4-基)苯酚,4-(3-乙基-2-甲基己-2-基)首先将用于测定的)苯酚(3E22NP)和4-(2,3-二甲基庚基-2-基)苯酚用作标准物质。工业混合物中的13种异构体的质量百分比含量分别超过2%。东京化学工业公司(TCI),Aldrich和Fluka的混合物中的总质量百分比分别为89 +/- 2%,75 +/- 4%和77 +/- 2%。三种混合物中4-(3,6-二甲基庚基-3-基)苯酚的丰度最大,为11.1 +/- 2%至9。9 +/- 0.3%,而4-(2-甲基辛烷-2-基)苯酚最小,为2.9 +/- 0.3%至3.0 +/-