除了许多其他卤化消毒副产品（DBPs），还有一些 包括氯化、溴化和混合溴氯化的卤代硝基甲烷 在饮用水中发现了硝基甲烷。这些卤代硝基甲烷， 尤其是溴化的，比大多数的有机化合物更具细胞毒性和致突变性 目前在饮用水中受到监管的DBP。在这项工作中，气相色谱-质谱（GC/MS）被用于 研究实验室制备的氯气中卤代硝基甲烷的形成 水预分区和溴浓度升高对臭氧层的影响 研究了卤代硝基甲烷的形成。 实验是在实验室中使用模型化合物前体进行的 加入去离子水中，以确定水中硝基氮的来源 卤代硝基甲烷。研究的前体包括腐殖酸和黄腐酸（Suwannee） 河流标准），氨基酸，2,4- 以及2,5-二氯苯酚和叶绿素b 在存在和不存在亚硝酸盐的情况下与氯（0.4 mM-2.5 mM）反应 （0毫米-1.0毫米）。对于大多数卤代硝基甲烷的形成研究，100 mg/L的溶液 对含有1 mM亚硝酸盐和0.02-0.8 mM溴化物的腐殖酸进行氯化（2.5 mM HOCl）24小时。对于预臭氧层，向溶液中添加10.5 mg/L臭氧 在加氯前10分钟反应。使用2.0%的溶液将pH值调节至7.5 mM碳酸氢盐缓冲液¹⁵N标记的亚硝酸盐（^{15NO₂ -）也发生反应，质量 研究了卤代硝基甲烷的光谱。SPE聚合物吸附剂筒 （100mg/6mL，Strata-X）用于提取。气相色谱法 采用电子电离质谱法（MS）对样品进行了测定 卤代硝基甲烷。包括3个参考文献、图表。}

In addition to many other halogenated disinfection byproducts (DBPs), a number of halonitromethanes including chlorinated, brominated, and mixed bromochlorinated nitromethanes, have been identified in drinking water. These halonitromethanes, especially the brominated ones, are more cytotoxic and mutagenic than most of the DBPs that are currently regulated in drinking water. In this work, gas chromatography-mass spectronomy (GC/MS) was used to study the formation of halonitromethanes during the chlorination of laboratory prepared water. The effect of preozonation and elevated bromide concentration on halonitromethane formation was investigated. Experiments were conducted in the laboratory using model compound precursors spiked into deionized water to determine the source of the nitrogen in the nitro group of the halonitromethanes. Precursors studied included humic and fulvic acid (Suwannee River Standard), amino acids, 2,4- and 2,5-dichlorophenol, and chlorophyll b, which were reacted with chlorine (0.4 mM-2.5 mM) in the presence and the absence of nitrite (0 mM-1.0 mM). For most halonitromethane formation study, the solution of 100 mg/L humic acid containing 1 mM nitrite and 0.02-0.8 mM bromide was chlorinated (2.5 mM HOCl) for 24 hours. For the preozonation, 10.5 mg/L ozone was added into the solution and reacted 10 minutes before chlorine addition. The pH was adjusted to 7.5 using 2 mM bicarbonate buffer. ¹⁵N labeled nitrite (^{15NO₂ -) was also reacted, and the mass spectra of the halonitromethanes were examined. SPE polymeric sorbent cartridges (100mg/6mL, Strata-X) were used for extraction. Gas chromatography (GC) with electron ionization mass spectrometry (MS) was used to measure the halonitromethanes. Includes 3 references, figures.}