建立了固相萃取-超高效液相-串联质谱联用法(SPE-UPLC-MS/MS)同时测定纺织品中8种有机磷酸酯阻燃剂(OPEs)的分析方法。样品用甲醇超声提取30min后,经弗罗里硅土固相萃取小柱净化后,采用Aglient Eclipse Plus C18色谱柱(3.0×100mm,...建立了固相萃取-超高效液相-串联质谱联用法(SPE-UPLC-MS/MS)同时测定纺织品中8种有机磷酸酯阻燃剂(OPEs)的分析方法。样品用甲醇超声提取30min后,经弗罗里硅土固相萃取小柱净化后,采用Aglient Eclipse Plus C18色谱柱(3.0×100mm,1.8μm),5mmol/mL乙酸铵水溶液(0.1%的甲酸水溶液)-乙腈作为流动相梯度洗脱电喷雾正离子(ESI+)模式离子化,选择多反应检测(MRM)方式监测,串联质谱测定,外标法定量。结果显示,各目标物方法检出限在0.003~0.500mg/kg,相关系数≥0.9991,回收率为81.7%~93.5%,RSD%为1.5%~3.4%。结果表明,本方法满足测定纺织品中有机磷酸酯阻燃剂的需要。展开更多
The production and application of organophosphate esters(OPEs)have dramatically increased in recent years due to their use as a replacement for brominated flame retardants.In this study,13 OPEs(∑_(13)OPEs)were analyz...The production and application of organophosphate esters(OPEs)have dramatically increased in recent years due to their use as a replacement for brominated flame retardants.In this study,13 OPEs(∑_(13)OPEs)were analyzed in indoor air samples from kitchens and living rooms in 14 residential homes in Beijing,China.The concentrations of ∑_(13)OPEs in kitchen air samples(mean:13 ng/m^(3))were significantly(p<0.05)higher than in living room air samples(5.0 ng/m^(3)).In addition,paired window surface organic film samples were collected and analyzed to investigate film-air partitioning,exhibiting a mean concentration of ∑_(13)OPEs of 4100 ng/m^(2).The congener profiles showed that tris(2-chloroisopropyl)phosphate(TCPP)was the predominant compound in both window film samples(48%)and the corresponding indoor air sample(56%).The estimated daily intakes(EDI)of OPEs via indoor air inhalation were 2.8 and 1.4 ng/kg/day for infants and adults,respectively,both of which are below the reference dose values(RfDs).Overall,these findings indicate that OPEs in the indoor air environment of residential homes in Beijing are not likely to pose a health risk to the general population.展开更多
The well preserved eclogitic rocks of the Tso Morari dome in eastern Ladakh, northwest Himalaya, provide information relevant to the exhumation of high pressure/low temperature rocks, and the early stage of the Himala...The well preserved eclogitic rocks of the Tso Morari dome in eastern Ladakh, northwest Himalaya, provide information relevant to the exhumation of high pressure/low temperature rocks, and the early stage of the Himalayan orogeny. The Tso Morari unit outcrops south of the Indus suture zone (Fig.1). The eclogitic dome is underlined on its eastern part by the Zildat normal fault where serpentinite lenses and partially hydrated peridotites are abundant. The close association of the high pressure rocks and serpentinites suggests a possible role of serpentinites in the exhumation of ultrahigh\|pressure rocks. To evaluate this possibility, geochemical analyses were carried out on the serpentinites closely associated with the Tso Morari eclogites.展开更多
Through ingestion and subsequent egestion,Arctic seabirds can bioaccumulate microplastics at and around their colony breeding sites.While microplastics in Arctic seabirds have been well documented,it is not yet unders...Through ingestion and subsequent egestion,Arctic seabirds can bioaccumulate microplastics at and around their colony breeding sites.While microplastics in Arctic seabirds have been well documented,it is not yet understood to what extent these particles can act as transport vehicles for plastic-associated contaminants,including legacy persistent organic pollutants(POPs),trace metals,and organic additives.We investigated the occurrence and pattern of organic and inorganic co-contaminants of microplastics in two seabird species from the Canadian Arctic-northern fulmar(Fulmarus glacialis)and black-legged kittiwake(Rissa tridactyla).We found that fulmars had higher levels of plastic contamination and emerging organic compounds(known to be plastic additives)than kittiwakes,whereas higher concentrations of legacy POPs were found in kittiwakes than the fulmars.Furthermore,fulmars,the species with the much larger foraging range(~200 km),had higher plastic pollution and overall contaminant burdens,indicating that birds may be acting as long-range transport vectors for plasticassociated pollution.Our results suggest a potential connection between plastic additive contamination and plastic pollution burdens in the bird stomachs,highlighting the importance of treating plastic particles and plastic-associated organic additives as co-contaminants rather than separate pollution issues.展开更多
文摘建立了固相萃取-超高效液相-串联质谱联用法(SPE-UPLC-MS/MS)同时测定纺织品中8种有机磷酸酯阻燃剂(OPEs)的分析方法。样品用甲醇超声提取30min后,经弗罗里硅土固相萃取小柱净化后,采用Aglient Eclipse Plus C18色谱柱(3.0×100mm,1.8μm),5mmol/mL乙酸铵水溶液(0.1%的甲酸水溶液)-乙腈作为流动相梯度洗脱电喷雾正离子(ESI+)模式离子化,选择多反应检测(MRM)方式监测,串联质谱测定,外标法定量。结果显示,各目标物方法检出限在0.003~0.500mg/kg,相关系数≥0.9991,回收率为81.7%~93.5%,RSD%为1.5%~3.4%。结果表明,本方法满足测定纺织品中有机磷酸酯阻燃剂的需要。
基金This work was supported by the National Key Research and Development Program,China(No.2018YFC0213103)the National Natural Science Foundation of China(Nos.22021003,21625702).
文摘The production and application of organophosphate esters(OPEs)have dramatically increased in recent years due to their use as a replacement for brominated flame retardants.In this study,13 OPEs(∑_(13)OPEs)were analyzed in indoor air samples from kitchens and living rooms in 14 residential homes in Beijing,China.The concentrations of ∑_(13)OPEs in kitchen air samples(mean:13 ng/m^(3))were significantly(p<0.05)higher than in living room air samples(5.0 ng/m^(3)).In addition,paired window surface organic film samples were collected and analyzed to investigate film-air partitioning,exhibiting a mean concentration of ∑_(13)OPEs of 4100 ng/m^(2).The congener profiles showed that tris(2-chloroisopropyl)phosphate(TCPP)was the predominant compound in both window film samples(48%)and the corresponding indoor air sample(56%).The estimated daily intakes(EDI)of OPEs via indoor air inhalation were 2.8 and 1.4 ng/kg/day for infants and adults,respectively,both of which are below the reference dose values(RfDs).Overall,these findings indicate that OPEs in the indoor air environment of residential homes in Beijing are not likely to pose a health risk to the general population.
文摘The well preserved eclogitic rocks of the Tso Morari dome in eastern Ladakh, northwest Himalaya, provide information relevant to the exhumation of high pressure/low temperature rocks, and the early stage of the Himalayan orogeny. The Tso Morari unit outcrops south of the Indus suture zone (Fig.1). The eclogitic dome is underlined on its eastern part by the Zildat normal fault where serpentinite lenses and partially hydrated peridotites are abundant. The close association of the high pressure rocks and serpentinites suggests a possible role of serpentinites in the exhumation of ultrahigh\|pressure rocks. To evaluate this possibility, geochemical analyses were carried out on the serpentinites closely associated with the Tso Morari eclogites.
基金supported by Environment and Climate Change Canada,the Nunavut Wildlife Management Board,the Northern Contaminants Program(M-08 and M-74)the Crown-Indigenous Relations and Northern Affairs Department,and Acadia University.
文摘Through ingestion and subsequent egestion,Arctic seabirds can bioaccumulate microplastics at and around their colony breeding sites.While microplastics in Arctic seabirds have been well documented,it is not yet understood to what extent these particles can act as transport vehicles for plastic-associated contaminants,including legacy persistent organic pollutants(POPs),trace metals,and organic additives.We investigated the occurrence and pattern of organic and inorganic co-contaminants of microplastics in two seabird species from the Canadian Arctic-northern fulmar(Fulmarus glacialis)and black-legged kittiwake(Rissa tridactyla).We found that fulmars had higher levels of plastic contamination and emerging organic compounds(known to be plastic additives)than kittiwakes,whereas higher concentrations of legacy POPs were found in kittiwakes than the fulmars.Furthermore,fulmars,the species with the much larger foraging range(~200 km),had higher plastic pollution and overall contaminant burdens,indicating that birds may be acting as long-range transport vectors for plasticassociated pollution.Our results suggest a potential connection between plastic additive contamination and plastic pollution burdens in the bird stomachs,highlighting the importance of treating plastic particles and plastic-associated organic additives as co-contaminants rather than separate pollution issues.
