Bisphenol analogues are a group of chemicals which are being widely applied in industrial and household products owing to regulations on bisphenol A (BPA) in many countries. In this study, an analytical method, including extraction from complex environmental matrices, clean-up using solid phase extraction (SPE) and following-up derivatisation prior to gas chromatography coupled with mass spectrometry (GC-MS), was developed to analyse seven commonly used bisphenols in sediment. Five kinds of extraction solvents, four kinds of SPE cartridges, and four kinds of SPE eluting solvents were individually tested for their performances; and the conditions for derivatising were also optimised. Finally, C18 cartridge was determined as the SPE cartridge and methanol was selected as extracting and eluting solvent. Acetic anhydride (AA) was used as derivatising agent and reaction took 20 min at room temperature. The method was used successfully to measure the seven bisphenol compounds in sediment samples from Taihu Lake, China. BPA, bisphenol F and bisphenol S were detected in all sediment samples, with concentrations in the range of 3.94-33.2; 0.503-3.28 and 0.323-27.3 ng g(-1) dw. Other compounds were detected at low frequencies or not detected. The authors concluded that this method provides a convenient, reliable, and sensitive method to analyse bisphenol compounds in complex environmental samples.
Authors: Wang Q, Zhu L, Chen M, Ma X, Wang X, Xia J. ;Full Source: Chemosphere. 2016 Dec 2;169: 709-715. doi: 10.1016/j.chemosphere.2016.11.095. [Epub ahead of print] ;