Determination of polychlorinated biphenyls in corn by solid phase extraction followed by gas chromatography-mass spectrometry

Química Nova

Costabeber, Joni Hilda¹  Martins, Marcos Antônio Pinto¹  Zanatta, Nilo¹  Mohr, Susana¹  Universidade Federal de Santa Maria, Santa Maria, Brasil¹  Bonacorso, Helio Gauze¹  Porte, Liliane Medianeira Favero¹  Schwanz, Thiago Guilherme¹ 

关键词: PCB;    corn;    GC/MS.;   

DOI  :  10.1590/S0100-40422012000300021

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This paper describes an analytical method for analyzing polychlorinated biphenyls in corn samples using solid phase extraction (SPE) followed by determination by GC-MS. All calibration curves proved linear (r> 0.99). Recoveries ranged between 74.1 and 110.6% with relative standard deviation lower than 20% for all compounds. The limits of quantitation for the method were between 0.025 and 0.1 ng g-1. Of the 51 samples analyzed, PCB 180 showed the highest frequency, being detected in more than 39%, followed by PCB 138, detected in more than 33% of samples.

【 授权许可】

Unknown