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分散液液微萃取-气相色谱法测定白洋淀水中PAEs 总被引:5,自引:1,他引:4
以四氯化碳为萃取剂,乙腈为分散剂,采用分散液液微萃取-气相色谱法测定水中邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二丁酯、邻苯二甲酸二丁基苄基酯、邻苯二甲酸二(2-乙基己酯)和邻苯二甲酸二正辛酯,优化了萃取条件。6种邻苯二甲酸酯在1.00μg/L~100μg/L范围内线性良好,方法检出限为0.18μg/L~2.5μg/L,标准溶液测定的RSD≤6.1%,白洋淀水样的加标回收率为70.9%~119%。 相似文献
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固相萃取- GC/MS法测定水中邻苯二甲酸酯类 总被引:3,自引:0,他引:3
采用固相萃取-GC/MS法测定水中6种邻苯二甲酸酯类有机污染物,比较了不同固相萃取柱对萃取效果的影响,优化了水样pH值、水样流量、穿透体积、洗脱溶剂、洗脱剂体积、洗脱流量等萃取条件。方法在0.050μg/L-800μg/L范围内线性良好,检出限为0.008μg/L~0.03μg/L,标准溶液测定的RSD≤10.5%,实际水样加标回收率为80.0%-100%。 相似文献
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建立了水中15种酞酸酯的液液萃取/固相萃取—气相色谱测定方法。就液液萃取探讨了萃取溶剂、萃取溶剂用量和水样pH值的影响,就固相萃取探讨了固相萃取柱、水样pH值和洗脱溶剂的影响。根据研究结果,确定液液萃取条件为调节pH至7,以二氯甲烷为萃取溶剂,萃取5 min;固相萃取条件为水样调节pH至7,经C18柱萃取后,以正己烷/丙酮混合溶剂(V∶V=5∶1)洗脱。测定15种酞酸酯类化合物的实际水样,液液萃取加标回收率为68%~128%,固相萃取加标回收率为65%~135%;液液萃取方法检出限为0.36~0.47μg/L,固相萃取方法检出限为0.20~0.39μg/L。 相似文献
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北京公园水体中邻苯二甲酸酯类物质的测定及其分布特征 总被引:4,自引:2,他引:2
为了正确评估北京市公园水体受PAEs污染的程度,采集了北京11个公园湖水的水样,采用固相萃取-气相色谱联用技术检测了其中六种邻苯二甲酸酯类物质(PAEs)的含量,该方法加标回收率在73%~89.3%,RSD为5.9%~18.1%,检出限在0.40~4.58mg/L。实验结果为北京公园水体中总PAEs浓度在6.4~138.1μg/L,平均值为27.9μg/L,证明北京公园水体受到不同程度的PAEs污染,主要的污染物为邻苯二甲酸二丁酯(DBP)和邻苯二甲酸双(2-乙基己基)酯(DEHP),其中东南部以及西北部的公园污染较严重。分析了PAEs在公园湖水底泥中和水体中的分布特征,结果显示,PAEs在湖水底泥中的含量明显大于在水体中的含量。 相似文献
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建立了液液萃取-气相色谱-质谱(LLE -GC/MS)同时测定饮用水中的6种酞酸酯类化合物、百菌清和联苯胺的方法。选用3种有机溶剂进行萃取,筛选出回收率高、操作简单的前处理方法,萃取后经气相色谱-质谱分析。方法表明:8种物质线性良好,相关系数为0.9978~0.9995,用二氯甲烷萃取回收率最佳,回收率在90.1%~118%之间,相对标准偏差在0.24%~7.21%之间。 相似文献
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Survey of Levels of Phthalate Ester Plasticizers in a Sewage Lagoon Effluent and a Receiving Stream 总被引:2,自引:0,他引:2
Ogunfowokan AO Torto N Adenuga AA Okoh EK 《Environmental monitoring and assessment》2006,118(1-3):457-480
In this study, samples from a sewage treatment lagoon and those from a receiving stream were analyzed for their phthalate
esters content. Knowledge of the distribution of ubiquitous phthalate esters in the sewage lagoon and the receiving stream
was necessary because of the reports of their subtle toxicity to aquatic biota and humans. Liquid–liquid extraction, Clean-up
experiment and High Performance Liquid Chromatography (HPLC) were the methods employed for the quantitative determination
of the Phthalates. A study of uncontaminated water was done to establish blank levels. The sewage lagoon and the receiving
stream were grossly polluted as several phthalate ester plasticizers: DMP, DEP, DPhP, DBP, DEHP, DOP and DINP were found present
at monthly mean levels of between 24.02 mg/L and 139.25 mg/L in the sewage treatment lagoon and 10.41 mg/L and 80.53 mg/L
in the receiving stream. The results showed higher levels of phthalate esters in the sewage lagoon compared to the receiving
stream. The sewage lagoon was identified as a pollution point source into the receiving stream. Levels of phthalates obtained
from the receiving stream are much higher than the water criteria of 3 μg/L phthalates recommended by the United States Environmental Protection Agency (USEPA) for the protection of fish and other
aquatic life in water and the Suggested No-Adverse Effect Levels (SNAEL) of 7.5–38.5 μg/L for drinking water. This should give cause for great environmental concern. Peoples’ health downstream is at stake and
so is the ‘health’ of the ecosystem. 相似文献
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Adeleke A. Adeniyi Olumuyiwa O. Okedeyi Khafilat A. Yusuf 《Environmental monitoring and assessment》2011,172(1-4):561-569
The detection and quantification of four phthalate esters??dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), and diethylhexyl phthalate (DEHP)??in water, sediment, and some fish species were carried out using flame ionization gas chromatography. The samples were collected from the Ogun river catchments, Ketu, Lagos. The DMP was not detected in the water and fish samples but was detected in sediments collected from four of the six sampling sites. The concentration of DEP, DBP, and DEHP in the fish species ranged from 320.0?C810.0, 380.0?C1,080.0, and 40.0?C150.0 ??g/kg in Tilapia sp.; 310.0?C860.0, 400.0?C1,170.0, and 40.0?C110.0 ??g/kg in Chrysichthys sp.; and 320.0?C810.0, 400.0?C3,970.0, and 30.0?C300.0 ??g/kg (DEHP) in Synodontis sp., respectively. The differences in fish phthalate levels are not statistically significant at p?<?0.05, an indication that phthalate esters accumulation is not fish species dependent. The DEP, DBP, and DEHP values recorded are considerably higher than the maximum allowed concentrations for drinking water prescribed by the US Environmental Protection Agency. The phthalate pollution index and biosediment accumulation factor values were also calculated. 相似文献
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液液萃取-气相色谱法测定饮用水中硝基苯类化合物 总被引:1,自引:0,他引:1
采用液液萃取-气相色谱法测定饮用水中10种硝基苯类化合物,通过萃取条件优化试验,选择正己烷为萃取剂,使目标物在0μg/L~38.5μg/L之间线性良好,检出限为0.002μg/L ~0.005μg/L。实际饮用水样的加标回收率为80.8%~104%,RSD<3%。用该方法测定桂林市4个水厂饮用水,结果硝基苯、间-二硝基苯、2,4-二硝基氯苯未检出,其余7种硝基苯类化合物虽有检出,但检出值均低于标准规定的限值。 相似文献
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漓江桂林段酞酸酯类污染调查 总被引:4,自引:0,他引:4
对漓江桂林段酞酸酯类污染为期一年的调查结果表明,漓江桂林段已检出酞酸酯,并且河水中酞酸酯含量的高低与环境温度有直接关系,气温高时,河水中酞酸酯含量高,当河流流泾城市时,大量生活废水的汇入,不会导致河水中酞酸酯含量的增加。 相似文献