气相色谱-串联质谱法测定水产品中7种多溴联苯醚

目的 建立水产品中7种多溴联苯醚的EMR QuEChERS-气相色谱-三重四级杆串联质谱测定方法。方法 样品采用乙酸乙酯经涡旋振荡和超声混合提取、Bond Elut QuEChERSEMR-Lipid增强型脂质去除产品进行前处理,使用大体积进样模式,运用三重四极杆串联质谱的选择性反应监测技术(MRM)对水产品中7种多溴联苯醚进行实测分析。结果 在线性范围(0.10～10μg/L)内呈现良好的线性关系,线性系数(R²)0.997 9～0.999 9,检出限为0.001 7～0.042 0 ng/g,回收率为84.83%～105.50%,相对标准偏差为1.85%～8.22%。结论 本法样品前处理操作简单、灵敏度、准确度和精密度高,选择性好以及良好的抗干扰能力,适用于水产品中多溴联苯醚的测定要求。     

人体胎盘组织二噁英和多溴联苯醚化合物负荷水平初步研究

目的 建立人体胎盘组织样品氯化二苯并二噁英(PCDD)和呋喃(PCDFs)、多氯联苯(PCBs)、多溴联苯醚(PBDEs)化合物同时准确定量检测分析方法,揭示上述持久性有机污染物人体负荷水平,并初步进行危险性评估.方法 采用国际权威标准方法--核素(同位素)稀释的高分辨气相色谱/高分辨双聚焦磁式质谱联用(HRGC/HRMS)技术,以多离子检测方法对人体胎盘组织样品中17个PCDD/Fs和12个共平面PCBs以及7个PBDEs化合物分别进行定性和定量分析,用WHO-TEF值计算所有样品的毒性当量浓度∑TEQ(PCDD+PCDFs+PCBs)和PBDEs浓度,进一步对人体二嗯英和PBDEs化合物负荷水平进行危险性评估.结果 6个胎盘组织样品中PCDD/Fs和PCBs化合物毒性当量总浓度∑TEQ(PCDD+PCDFs+PCBs)中位数是18.15 WHO-TEQ pg/g脂肪.范围分布在5.14～67.01 WHO-TEQ pg/g脂肪之间.2,3,4,7,8-PeCDFs、1,2,3,7,8-PeCDDs、PCB126是毒性当量的主要贡献者,合计占65%.以7个化合物计算PBDEs总浓度,6个样品的中位数值为2.73 ng/g脂肪,均数为7.17 ng/g脂肪,范围是0.95～25.99 ng/g脂肪.BDE47是最主要的污染同系物,占到35%.浓度最高的一个受试样品其毒性当量总浓度∑TEQ(PCDD+PCDFs+PCBs)已经达到世界上已知高暴露区人体二噁英污染负荷水平.结论 我们在本研究中建立了人体组织样品中持久性有机化合物二噁英和PBDEs化合物同时准确定量检测方法,高二噁英负荷水平的样品提供者可能对胎儿存在健康危害的高暴露风险,对于健康的远期影响还需要深入进行医学追踪研究.     

室内环境中多溴联苯醚污染及人体暴露研究进展

多溴联苯醚作为一种性能优异的溴代阻燃剂广泛添加于各类室内消费产品中,但是在产品使用过程中多溴联苯醚会被不断释放进入室内环境,从而危害人体健康。本文通过综述国内外相关研究,从室内空气及尘土中多溴联苯醚的污染分布特征和人体暴露水平两个方面阐述室内环境多溴联苯醚污染对人体健康的影响,并提出未来可能的关注点。     

多溴联苯醚的环境分布

持久性有毒物质（PTS）与臭氧层破坏和温室效应一样并称为21世纪影响人类生存与健康的三大环境问题。多溴联苯醚（PBDEs）作为PTS的一种由于其对人体健康造成的危害日益引起各国科学家的关注。该文就PBDEs在世界范围内各种环境介质中的含量及分布情况作一综述。     

2010年太原市普通人群血清中多溴联苯醚负荷水平

目的 研究太原市普通人群血清中多溴联苯醚(PBDEs)负荷水平.方法 2010年在太原市共采集了42份普通人群血清样品,用固相萃取-气相色谱-负化学源-质谱法测定了样品中溴代联苯醚(BDE)-17、BDE-28、BDE-47、BDE-66、BDE-99、BDE-100、BDE-153、BDE-154、BDE-183 和...     

饮用水及牛奶中多溴联苯醚毒性及检测研究进展

多溴联苯醚是一种性能优良的溴代阻燃剂,属于典型的持久性有机污染物,广泛用于电子电气产品、装饰材料等相关附属产品,具有高亲脂性、持久性、生物积累性及高毒性等特点。本文介绍了多溴联苯醚的理化性质、来源、分布、毒性及常见检测方法。目前多溴联苯醚在饮用水及牛奶中既没有国标方法检测其含量,也没有相关卫生标准。本文建议对生活饮用水及牛奶中多溴联苯醚含量进行区域调查,为多溴联苯醚国家检验标准和卫生标准制定提供一定参考依据。     

室内环境中多溴联苯醚污染及人体暴露研究进展北大核心CSCD

多溴联苯醚作为一种性能优异的溴代阻燃剂广泛添加于各类室内消费产品中,但是在产品使用过程中多溴联苯醚会被不断释放进入室内环境,从而危害人体健康。本文通过综述国内外相关研究,从室内空气及尘土中多溴联苯醚的污染分布特征和人体暴露水平两个方面阐述室内环境多溴联苯醚污染对人体健康的影响,并提出未来可能的关注点。     

多溴联苯醚的环境和人体分布及生态毒理学效应

多溴联苯醚(PBDEs)污染已在世界各地普遍存在,且其浓度在环境中快速增长,所以受到人们的广泛关注.环境中的PBDEs的迁移规律决定其环境效应,是进行环境和健康风险评价的基础.目前关于PBDEs的研究主要集中于沉积物及生物体内的PBDEs分析检测,对其生态毒理效应的研究尚处于起步阶段.该文概述了PBDEs的研究现状,着重介绍了PBDEs在环境中的分布模式、在生物体内的蓄积规律以及环境中PBDEs的生态毒理效应等方面的研究进展,同时也阐述了PBDEs污染对人体健康的影响,并提出了PBDEs研究亟待解决的问题.

Abstract：

Polybrominated diphenyl ethers(PBDEs)are widely present in the world and their concentration in the environment has been increasing rapidly.PBDEs pollution has caused an extensive concern in recent years.The environmental effects of PBDEs are decided by their transfer and transformation.which is the basis of environmental and health risk evaluation.At present,a considerable number of detection of PBDEs has been undertaken in sediment and wildlife.However,little research has been done on the ecotoxicology of PBDEs.The purpose of this paper was to introduce the research status of PBDEs,to summarize emphatically their distribution model,bioaccumulation regularity and ecotoxicology effects in the environment,and to discuss the influences of PBDEs on human health.Finally the problems needed to be solved in this field are proposed.     

多溴联苯醚致癌效应研究进展

作为一种新型持久性有机污染物,多溴联苯醚(PBDEs)广泛存在于大气、水、土壤等多种环境介质中,能够通过食物链在生物组织中富集,对神经、生殖、免疫等多种器官产生毒性作用,其环境影响和毒性效应已引起国内外研究学者的高度关注。尤其PBDEs的潜在致癌性将对动物和人类造成难以想象的威胁。本文主要对PBDEs的分类组成、性质等做了概述,重点介绍了PBDEs致癌效应及机制研究,并对PBDEs致癌机制的研究方向进行了展望。     

深圳市大气中多溴联苯醚污染水平和特征及人体呼吸暴露分析

目的 揭示深圳市大气中多溴联苯醚污染水平和特征,并初步分析当地人群的多溴联苯醚(PBDEs)呼吸暴露量.方法 采用大流量主动采样装置,利用同位素稀释的高分辨气相色谱/高分辨双聚焦磁式质谱联用(HRGC/HRMS)方法,对6个行政区域、11个采样点位中的大气(含颗粒和气相)中7种多溴联苯醚单体浓度(BDE-28,BDE-47,BDE-99,BDE-100,BDE-153,BDE-154,BDE-183)进行检测分析,并采用呼吸速率、肺泡中气体交换的空气比率等参数,对当地人群的多溴联苯醚呼吸暴露量进行分析.结果 深圳市大气中∑7PBDEs的浓度范围为8.28 ～ 168.86pg/m,平均浓度为29.03 pg/m.丰水期和枯水期样品浓度存在季节差异,丰水期多溴联苯醚的浓度高于枯水期.BDE47和BDE-99在两个时期均是丰度较高的构型,但在枯水期所占比例有所下降,单体分布趋于平均化.深圳市民多溴联苯醚的日呼吸暴露量成人为4.72 pg/kg,儿童为10.74 pg/kg.结论 深圳市大气中多溴联苯醚污染水平高于英国、韩国、日本的大阪和京都的城市水平;但是低于国内的广州、北京等城市已经报道的水平.儿童多溴联苯醚的呼吸暴露量明显高于成人,应该引起足够的重视.     

Trophodynamics of polybrominated diphenyl ethers and methoxylated polybrominated diphenyl ethers in a marine food web

The current study measured the concentrations of 14 polybrominated diphenyl ethers (PBDEs) and eight methoxylated polybrominated diphenyl ethers (MeO-PBDEs) in a marine food web and estimated their trophic magnification factors (TMFs), to highlight the differences between invertebrates, fish, and seabirds. Concentrations of PBDEs were orders of magnitude greater in seabirds (184.07 ± 161.63 ng/g lipid wt) compared with invertebrates and fish (19.01 ± 14.14 ng/g lipid wt). Although the congener profiles in invertebrates, fish, and juvenile seabirds were dominated by BDE-47, the contributions of BDE-99 and BDE-153 in adult seabirds were also significant. Unlike PBDEs, however, higher average MeO-PBDE concentrations were detected in fish (126.27 ± 189.27 ng/g lipid wt) and bivalves (15.96 ± 11.82 ng/g lipid wt) than in seabirds (2.61 ± 2.87 ng/g lipid wt). Correlations between lipid-normalized PBDE concentrations and trophic levels confirmed that seven PBDE congeners were magnified in the invertebrate-fish-seabird food web and that PBDE concentrations increased at a much greater rate across trophic levels in seabirds than in invertebrates and fish. This result indicates that estimating TMFs of PBDEs separately for seabirds, invertebrates, and fish is preferable. For MeO-PBDEs, no significant relationships were obtained in the invertebrate-fish-seabird food web.     

Profiles of polybrominated diphenyl ethers in aquatic biota

The profiles (concentrations scaled to a sum of 100) of polybrominated diphenyl ethers (PBDEs) in aquatic fauna differ from those of the commercial PBDE formulations, particularly by a much higher proportion of the congener 47. At the same time, the profiles reported by different authors vary a great deal and no patterns related to species, localities, etc. are obvious. It seems that there are systematic differences among the reporting laboratories, and measurement errors within the same laboratory may also play a role. However, the profiles of PBDEs in fish from the Baltic are very similar and form a tight "cluster". PBDE profiles in crustaceans appear different from those in fish.     

Exposure of Americans to polybrominated diphenyl ethers

Polybrominated diphenyl ethers, PBDEs, are a class of brominated flame retardants that, like other persistent organic pollutants (POPs), have been found in humans, wildlife, and biota worldwide. Unlike other POPs, however, the key routes of human exposure are not thought to be food and fish, but rather are from their use in household consumer products, and to the high levels of PBDEs found in house dust. The exposure of Americans to PBDEs was systematically evaluated in this study. First, exposure media data on PBDE congeners were compiled. Then, an adult intake dose was derived using exposure factors in combination with these data. The exposure pathways evaluated included food and water ingestion, inhalation, and ingestion and dermal contact to house dust. These intakes were converted to a body burden using a simple pharmacokinetic (PK) model. The predicted body burdens were compared with representative profiles of PBDEs in blood and milk. The adult intake dose of total PBDEs was estimated to be 7.7 ng/kg body weight/day, and children's estimated intakes were higher at 49.3 ng/kg/day for ages 1-5, 14.4 ng/kg/day for 6-11, and 9.1 ng/kg/day for 12-19. The much higher dose for the child age 1-5 was due to the doubling of dust ingestion from 50 to 100 mg/day. The predicted adult body burden of total PBDEs was 33.8 ng/kg lipid weight (lwt), compared to representative measurements in blood and milk at 64.0 and 93.7 ng/g lwt, respectively Most of this apparent underprediction in total concentration was due to an underprediction of the key congener, BDE 47. The value for BDE 47 half-life in the body was identified as the variable most likely in error in this exercise. Other congener predictions compared well with measurements, suggesting general validity with the approach. An important finding from this assessment is that the food intake estimate of about 1.3 ng/kg/day (of the 7.7 ng/kg/day total) cannot explain current US body burdens; exposures to PBDEs in house dust accounted for 82% of the overall estimated intakes.     

Flame retardant exposure: polybrominated diphenyl ethers in blood from Swedish workers.

Polybrominated diphenyl ethers (PBDEs) are used as additives in polymers and textiles to prohibit the development of fires. Because of the production and use of PBDEs, their lipophilic characteristics, and persistence, these compounds have become ubiquitous environmental contaminants. The aim of the present study was to determine potential exposures of PBDEs to clerks working full-time at computer screens and personnel at an electronics-dismantling plant, with hospital cleaners as a control group. Five PBDE congeners--2,2',4,4'-tetraBDE; 2,2',4,4',5,5'-hexaBDE; 2,2',4,4',5, 6'-hexaBDE; 2,2',3,4,4',5',6-heptaBDE; and decaBDE--were quantified in blood serum from all three categories of workers. Subjects working at the dismantling plant showed significantly higher levels of all PBDE congeners in their serum as compared to the control group. Decabromodiphenyl ether is present in concentrations of 5 pmol/g lipid weight (lw) in the personnel dismantling electronics; these concentrations are comparable to the concentrations of 2,2',4, 4'-tetraBDE. The latter compound was the dominating PBDE congener in the clerks and cleaners. The major compound in personnel at the dismantling plant was 2,2',3,4,4',5',6-heptaBDE. Concentrations of this PBDE congener are almost twice as high as for 2,2',4, 4'-tetraBDE in these workers and seventy times the level of this heptaBDE in cleaners. The total median PBDE concentrations in the serum from workers at the electronics-dismantling plant, clerks, and cleaners were 37, 7.3, and 5.4 pmol/g lw, respectively. The results show that decabromodiphenyl ether is bioavailable and that occupational exposure to PBDEs occurs at the electronics-dismantling plant.     

上海市某医院产妇乳汁中多溴联苯醚暴露水平

目的 通过对上海市某医院产妇乳汁中多溴联苯醚(PBDEs)含量的测定和分析,了解该地区人群中PBDEs的暴露水平及其相关影响因素.方法 于2006年9月至2007年4月在上海市某医院对48名产妇进行问卷调查,并采集其乳汁样本,产妇均为单胎妊娠,排除高血压、糖尿病、HIV感染和不良用药史.采用气相色谱-负化学电离源-质谱法测定乳汁中7种PBDE同族体[溴代联苯醚(BDE)-28,BDE-47,BDE-100,BDE-99,BDE-154,BDE-153和BDE-183]的含量,并分析其影响因素.结果 产妇乳汁中7种PBDEs(∑,PBDEs)浓度中位数为8.81 ng/g脂重(lipid weight,1w),浓度范围为1.92-41.55 ng/g 1w.BDE-28、BDE-47、BDE-100、BDE-99、BDE-154、BDE-153、BDE-183检出率分别为98%(47/48)、96%(46/48)、86%(41/48)、90%(43/48)、83%(40/48)、98%(47/48)、90%(43/48);浓度中位数分别为0.88、0.99、0.97、1.39、1.14、2.17、1.41 ng/g 1w.不同学历产妇乳汁中PBDEs水平(logΣ7PBDEs)分别为:初中及以下为(0.89±0.24)、高中为(1.02±0.17)、大专及以上为(1.08±0.28);不同月收入水平产妇乳汁中PBDEs水平(log∑7PBDEs)分别为:＜1000元为(0.89±0.12)、1000-3000元为(1.01±0.24)、＞3000元为(1.13±0.21).相关分析发现母亲受教育水平(r=0.322,P＜0.05)和收入水平(r=0.388,P＜0.05)与母乳PBDEs暴露水平呈正相关.结论 产妇乳汁中普遍含有PBDEs,母亲受教育水平和收入水平可能影响母乳中PBDEs水平.

Abstract：

Objective To measure the concentration of polybrominated diphenyl ethers(PBDEs)in human breast milk from a hospital in Shanghai and analyze the influencing factors.Methods Forty-eight puerperas from a hospital in Shanghai were selected to answer a questionnaire.and their breast milk samples were collected from September 2006 to April 2007.All the puerperas were singleton pregnancies.excluding high blood pressure.diabetes,HIV infection and adverse medical history.Seven congenera(BDE-28,BDE47,BDE-100,BDE-99,BDE-154,BDE-153 and BDE-183)were measured by gas chromatography-negative chemical ionization-mass spectrometry and the influencing factors were analyzed.Results The median of total PBDEs concentration in breast milk was 8.81 ng/g lipid weight(1w),and the range was 1.92-41.55,,g/g 1W. The detection rates of seven congeners(BDE-28,BDE-47,BDE-100,BDE-99,BDE-154,BDE-153,BDE-183)were 98%(47/48),96%(46/48),86%(41/48),90%(43/48),83%(40/48),98%(47/48),90%(43/48),and the median of them was,0.88,0.99,0.97,1.39,1.14,2.17,1.41 ng/g 1w,respectively.LogΣ7PBDEs in breast milk from mothers with different education levels were divided into junior high school or lower(0.89 ±0.24),senior high school(1.02±0.17),junior college or higher(1.08±0.28).LogΣ7PBDEs in breast milk from mothers with different income levels were divided as ＜1000 yuan(0.89±0.12),1000-3000 yuan(1.01±0.24),＞3000 yuan(1.13±0.21).Correlation analysis showed that both the mothers'education level(r=0.322.P＜0.05)and income level(r=0.388.P＜0.05)have a positive correlation to PBDEs levels in breast milk. Conclusion It is very common to detect PBDEs in human breast-milk.however,the education and income levels of the mothers my be the influencing factors.     

Body burdens of polybrominated diphenyl ethers among urban anglers

Polybrominated diphenyl ethers (PBDEs) have been widely used in the United States and worldwide as flame retardants. Recent PBDE production figures show that worldwide use has increased. To determine whether fish consumption is a source of PBDE exposure for humans, a cross-sectional epidemiologic study of New York and New Jersey urban anglers was conducted during the summers of 2001-2003. Frequency of local fish consumption was assessed by questionnaire, and blood samples for PBDE analysis were collected from 94 anglers fishing from piers on the lower Hudson River and Newark Bay. We analyzed PBDEs by gas chromatography-isotope dilution-high-resolution mass spectrometry. The congeners found in anglers' serum at the highest concentrations were, by International Union of Pure and Applied Chemistry numbers, BDE-47, BDE-153, and BDE-99. Anglers reporting consumption of local fish had higher, but nonstatistically significantly different, concentrations of PBDEs than did anglers who did not eat local fish. For some congeners (BDE-100 and BDE-153), we observed moderate dose-response relationships between serum PBDE levels and frequency of reported fish intake. These findings suggest that consumption of locally caught fish is not a major route of human exposure for this study population.     

上海市某医院产妇乳汁中多溴联苯醚暴露水平

Objective To measure the concentration of polybrominated diphenyl ethers(PBDEs)in human breast milk from a hospital in Shanghai and analyze the influencing factors.Methods Forty-eight puerperas from a hospital in Shanghai were selected to answer a questionnaire.and their breast milk samples were collected from September 2006 to April 2007.All the puerperas were singleton pregnancies.excluding high blood pressure.diabetes,HIV infection and adverse medical history.Seven congenera(BDE-28,BDE47,BDE-100,BDE-99,BDE-154,BDE-153 and BDE-183)were measured by gas chromatography-negative chemical ionization-mass spectrometry and the influencing factors were analyzed.Results The median of total PBDEs concentration in breast milk was 8.81 ng/g lipid weight(1w),and the range was 1.92-41.55,,g/g 1W. The detection rates of seven congeners(BDE-28,BDE-47,BDE-100,BDE-99,BDE-154,BDE-153,BDE-183)were 98%(47/48),96%(46/48),86%(41/48),90%(43/48),83%(40/48),98%(47/48),90%(43/48),and the median of them was,0.88,0.99,0.97,1.39,1.14,2.17,1.41 ng/g 1w,respectively.LogΣ7PBDEs in breast milk from mothers with different education levels were divided into junior high school or lower(0.89 ±0.24),senior high school(1.02±0.17),junior college or higher(1.08±0.28).LogΣ7PBDEs in breast milk from mothers with different income levels were divided as ＜1000 yuan(0.89±0.12),1000-3000 yuan(1.01±0.24),＞3000 yuan(1.13±0.21).Correlation analysis showed that both the mothers'education level(r=0.322.P＜0.05)and income level(r=0.388.P＜0.05)have a positive correlation to PBDEs levels in breast milk. Conclusion It is very common to detect PBDEs in human breast-milk.however,the education and income levels of the mothers my be the influencing factors.     

上海市某医院产妇乳汁中多溴联苯醚暴露水平

Objective To measure the concentration of polybrominated diphenyl ethers(PBDEs)in human breast milk from a hospital in Shanghai and analyze the influencing factors.Methods Forty-eight puerperas from a hospital in Shanghai were selected to answer a questionnaire.and their breast milk samples were collected from September 2006 to April 2007.All the puerperas were singleton pregnancies.excluding high blood pressure.diabetes,HIV infection and adverse medical history.Seven congenera(BDE-28,BDE47,BDE-100,BDE-99,BDE-154,BDE-153 and BDE-183)were measured by gas chromatography-negative chemical ionization-mass spectrometry and the influencing factors were analyzed.Results The median of total PBDEs concentration in breast milk was 8.81 ng/g lipid weight(1w),and the range was 1.92-41.55,,g/g 1W. The detection rates of seven congeners(BDE-28,BDE-47,BDE-100,BDE-99,BDE-154,BDE-153,BDE-183)were 98%(47/48),96%(46/48),86%(41/48),90%(43/48),83%(40/48),98%(47/48),90%(43/48),and the median of them was,0.88,0.99,0.97,1.39,1.14,2.17,1.41 ng/g 1w,respectively.LogΣ7PBDEs in breast milk from mothers with different education levels were divided into junior high school or lower(0.89 ±0.24),senior high school(1.02±0.17),junior college or higher(1.08±0.28).LogΣ7PBDEs in breast milk from mothers with different income levels were divided as ＜1000 yuan(0.89±0.12),1000-3000 yuan(1.01±0.24),＞3000 yuan(1.13±0.21).Correlation analysis showed that both the mothers'education level(r=0.322.P＜0.05)and income level(r=0.388.P＜0.05)have a positive correlation to PBDEs levels in breast milk. Conclusion It is very common to detect PBDEs in human breast-milk.however,the education and income levels of the mothers my be the influencing factors.     

A review of human exposure to polybrominated diphenyl ethers (PBDEs) in China

This paper reviews recent studies on human exposure to polybrominated diphenyl ethers (PBDEs) in China, with particular focus on external exposure routes (e.g. diet and dust ingestion, inhalation of air) and internal doses based on biomonitoring studies of PBDEs (e.g. breast milk, blood and hair). PBDE concentrations reported for fish samples collected from electronic waste (e-waste) recycling sites, PBDE manufacturing sites, local markets in selected cities and estuarine areas in China have been compiled. House dust has been a significant contributor to human exposure to PBDEs in many countries. This is especially true for toddlers, who are exposed to significantly higher doses of PBDEs than adults. Infants are also exposed to high levels of PBDEs via breast-feeding. The general population's inhalation exposure to PBDEs from household products is likely a less significant source into the indoor environment. In addition, the contribution of several exposure pathways to PBDEs among various age groups was analyzed. We found that house dust contributed most to the daily exposure to PBDEs for both toddlers and adults in urban areas of China. Furthermore, workers and residents in and around electronic recycling and PBDE manufacturing sites are exposed to the highest PBDE levels among all populations studied thus far. For the occupationally exposed populations, BDE209 was the dominant congener, in most cases. Rigorous pollution prevention and occupational protection measures are needed in China to mitigate potential health effects associated with PBDE exposures.     

北京地区市售蔬菜中多溴联苯醚的污染状况

目的了解蔬菜中多溴联苯醚(PBDEs)的污染水平和污染特征。方法于2014年1—3月采集北京居民日常食用的10种市售蔬菜样品,采用超声提取-复合硅胶柱净化-气相色谱质谱联用(GC-MS)方法对样品中42种PBDEs进行定性定量检测,并分析其污染水平和污染特征。结果各种蔬菜样品中均有PBDEs检出,PBDEs总含量为0.68~155.78pg/g湿重。不同种蔬菜其食用部位的PBDEs含量一般为叶菜类高于果菜类,如菠菜叶、小白菜叶、大白菜叶、芹菜叶、生菜、油菜叶、韭菜的PBDEs含量均较高,而尖椒、黄瓜、青椒中PBDEs的含量均较低。叶菜类蔬菜的可食用部位均为叶PBDEs含量较高,茎(梗)含量较低。不同蔬菜及同种蔬菜不同部位中各BDE单体检出率和含量不同,蔬菜中检出的主要BDE单体为BDE 47、BDE 99、BDE 153、BDE 28+33、BDE 75、BDE 66、BDE 154、BDE 183、BDE 118和BDE 209,检出率为44.4%~100%;未检出一溴联苯醚和八溴联苯醚。结论本次调查的蔬菜受到不同程度的PBDEs污染,以四溴、五溴和三溴联苯醚为主。