Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, China.
Environ Sci Technol. 2009 Dec 15;43(24):9287-93. doi: 10.1021/es901821a.
Iodinated disinfection byproducts (DBPs) are generally more toxic than their chlorinated and brominated analogues. Up to date, only a few iodinated DBPs in drinking water have been identified by gas chromatography/mass spectrometry. In this work, a method for fast selective detection of polar iodinated DBPs was developed using an electrospray ionization-triple quadrupole mass spectrometer (ESI-tqMS) by conducting precursor ion scan of iodide at m/z 126.9. With such a method, pictures of polar iodinated DBPs in chlorinated, chloraminated, and chlorine-ammonia treated water samples were achieved. By coupling state-of-the-art ultra performance liquid chromatography (UPLC) to the ESI-tqMS, structures of 17 iodinated DBPs were tentatively proposed. The results fully demonstrate that, with respect to the DBP number/levels among the three disinfection processes, chloramination generally generated the most/highest iodinated DBPs, chlorination generally produced the fewest/lowest iodinated DBPs, and chlorine-ammonia sequential treatment formed iodinated DBPs lying in between; the numbers of iodinated DBPs in chloraminated Suwannee River Fulvic Acid (SRFA) and Humic Acid (SRHA) were nearly the same, but the levels of aliphatic iodinated DBPs were higher in the chloraminated SRFA while the levels of aromatic iodinated DBPs were higher in the chloraminated SRHA; a couple of nitrogenous iodinated DBPs were found in chloramination and chlorine-ammonia treatment. The ratio of total organic iodine levels in chlorine-ammonia sequential treatment and chloramination could be expressed as a function of the lag time of ammonia addition.
碘消毒副产物（DBPs）通常比氯化和溴化类似物更具毒性。迄今为止，只有少数几种饮用水中的碘代 DBPs 已通过气相色谱/质谱联用仪（GC/MS）鉴定。在这项工作中，通过在 m/z 126.9 处对碘化物进行前体离子扫描，使用电喷雾电离-三重四极杆质谱仪（ESI-tqMS）开发了一种快速选择性检测极性碘代 DBPs 的方法。通过这种方法，可以获得氯化、氯胺化和氯氨处理水样中极性碘代 DBPs 的图谱。通过将最先进的超高效液相色谱（UPLC）与 ESI-tqMS 耦合，可以暂定提出 17 种碘代 DBPs 的结构。结果充分证明，就三种消毒过程中的 DBP 数量/水平而言，氯胺化通常产生最多/最高的碘代 DBPs，氯化通常产生最少/最低的碘代 DBPs，而氯氨顺序处理形成的碘代 DBPs则介于两者之间；氯胺化苏万尼河富里酸（SRFA）和腐殖酸（SRHA）中的碘代 DBPs 数量几乎相同，但氯胺化 SRFA 中的脂肪族碘代 DBPs 水平较高，而氯胺化 SRHA 中的芳香族碘代 DBPs 水平较高；在氯胺化和氯氨处理中发现了几种含氮碘代 DBPs。氯氨顺序处理和氯胺化中总有机碘水平的比例可以表示为氨添加滞后时间的函数。
