For purpose of purification and enrichment, environmental samples usually need to be pretreated before analysis because of low concentration of residual organic matters. Solid-phase extraction （SPE） is one of the fr...For purpose of purification and enrichment, environmental samples usually need to be pretreated before analysis because of low concentration of residual organic matters. Solid-phase extraction （SPE） is one of the frequently used methods of pretreatment. This article introduces the methodological principle and flow channel of SPE as well as the categories of frequently used small extraction column, analyzes the application of online SPE technology in environmental analysis, generalizes the advantages of online SPE and sets forth its developmental trend.展开更多
A method of rapidly detecting three kinds of microcystins( MCs) in environmental water samples by using disk SPE- ultra high performance liquid chromatography- tandem mass spectrometry( UPLC- MS / MS) was established....A method of rapidly detecting three kinds of microcystins( MCs) in environmental water samples by using disk SPE- ultra high performance liquid chromatography- tandem mass spectrometry( UPLC- MS / MS) was established. Firstly,environmental water samples were extracted by disk SPE column( C_(18)),and three kinds of MCs were separated by Waters BEH C_(18) chromatographic column with acetonitrile- 0. 2% formic acid solution as the mobile phase. After the gradient elution separation,the external standard method was used for quantitative and qualitative analysis under MRM of UPLC- MS / MS. The results showed that the three kinds of MCs in the range of 0. 05- 10 μg / L showed good linear relation,and the correlation coefficients were higher than 0. 999 4,while the method detection limit was 0. 04 ng / L. Under 0. 1,1,and 5 μg / L standard addition for the same environmental sample,the average recovery was 82. 8%- 108. 8%,and the relative standard deviation of determination results was2. 1%- 10. 1%( n = 6). This method is rapid,sensitive and accurate,so it can be effectively applied in the monitoring of MCs in environmental water samples.展开更多
应用固相萃取结合高效液相色谱-串联质谱法,建立了同时测定环境水样中7种苯胺类化合物的检测方法.实验表明,以ZORBAX Eclipse Plus C18（3.5μm,2.1×150mm）色谱柱为分离柱,乙腈-水（2mmol/L甲酸铵）为梯度洗脱的流动相,在电喷雾...应用固相萃取结合高效液相色谱-串联质谱法,建立了同时测定环境水样中7种苯胺类化合物的检测方法.实验表明,以ZORBAX Eclipse Plus C18（3.5μm,2.1×150mm）色谱柱为分离柱,乙腈-水（2mmol/L甲酸铵）为梯度洗脱的流动相,在电喷雾质谱正离子模式下,7min内可以分离目标化合物;在1～200μg/L浓度范围内,7种苯胺类化合物的峰面积与质量浓度的线性关系良好;添加水平分别为0.8、4.0、20.0μg/L时,目标化合物的平均回收率分别为68.5%～102.2%、71.4%～89.4%、62.0%～78.3%,相对标准偏差均小于6.9%;利用本方法对长江南京段平水期（2014.4）、丰水期（2014.8）和枯水期（2014.12）的14个采样点的环境水样进行检测,检出4-硝基苯胺、2,6-二乙基苯胺、3,4-二氯苯胺和4-异丙基苯胺4种苯胺类化合物,且4-硝基苯胺在3个时期14个采样点均能检出;风险商值法评估长江南京段水体中4-硝基苯胺的生态风险为低生态风险.展开更多
目的建立环境水样中大环内酯类、氟喹诺酮类、林可胺类、β-内酰胺类及四环素类5类共14种抗生素的固相萃取-高效液相色谱串联质谱法(SPE-HPLC-MS/MS)的测定方法。方法处理后的水样使用亲水-亲酯(HLB)固相萃取小柱进行目标物富集,以甲醇...目的建立环境水样中大环内酯类、氟喹诺酮类、林可胺类、β-内酰胺类及四环素类5类共14种抗生素的固相萃取-高效液相色谱串联质谱法(SPE-HPLC-MS/MS)的测定方法。方法处理后的水样使用亲水-亲酯(HLB)固相萃取小柱进行目标物富集,以甲醇洗脱,洗脱液氮气吹干复溶,采用HPLC-MS/MS进样分析。以乙腈-0.1%甲酸水溶液为流动相梯度洗脱,CAPCELL PAK C18柱为分析柱,采用电喷雾正离子模式电离,多反应监测模式扫描,外标法定量。结果14种抗生素分别在(2.0~1000)μg/L浓度范围内,具有良好线性关系,方法检出限分别为(0.1~0.2)ng/L;分别以阴性水样及河水作为基质,14种抗生素的加标平均回收率分别为68.3%~96.1%和64.2%~113.3%,相对标准偏差(n=6)分别为1.7%~11.4%和1.5%~9.5%;方法应用于东莞市东江水的检测分析,结果检出6种抗生素,质量浓度范围分别为(2.49~46.7)ng/L。结论本法灵敏、准确,可应用于环境水样中多种抗生素的检测。展开更多
文摘For purpose of purification and enrichment, environmental samples usually need to be pretreated before analysis because of low concentration of residual organic matters. Solid-phase extraction （SPE） is one of the frequently used methods of pretreatment. This article introduces the methodological principle and flow channel of SPE as well as the categories of frequently used small extraction column, analyzes the application of online SPE technology in environmental analysis, generalizes the advantages of online SPE and sets forth its developmental trend.
文摘A method of rapidly detecting three kinds of microcystins( MCs) in environmental water samples by using disk SPE- ultra high performance liquid chromatography- tandem mass spectrometry( UPLC- MS / MS) was established. Firstly,environmental water samples were extracted by disk SPE column( C_(18)),and three kinds of MCs were separated by Waters BEH C_(18) chromatographic column with acetonitrile- 0. 2% formic acid solution as the mobile phase. After the gradient elution separation,the external standard method was used for quantitative and qualitative analysis under MRM of UPLC- MS / MS. The results showed that the three kinds of MCs in the range of 0. 05- 10 μg / L showed good linear relation,and the correlation coefficients were higher than 0. 999 4,while the method detection limit was 0. 04 ng / L. Under 0. 1,1,and 5 μg / L standard addition for the same environmental sample,the average recovery was 82. 8%- 108. 8%,and the relative standard deviation of determination results was2. 1%- 10. 1%( n = 6). This method is rapid,sensitive and accurate,so it can be effectively applied in the monitoring of MCs in environmental water samples.
文摘建立了高效液相色谱-电喷雾串联质谱(HPLC-ESI MS/MS)分析环境水样中22种抗生素类药物的方法。采用HLB固相萃取柱对环境水样中的目标化合物进行富集、净化,然后以6mL氨水-甲醇(5∶95,v/v)溶液洗脱。收集的洗脱液经氮气吹干至1mL,然后进行HPLC-ESI MS/MS分离分析。色谱流动相A相为甲醇-乙腈(1∶1,v/v),B相为0.3%(体积分数)甲酸水溶液(含0.1%(体积分数)甲酸铵,pH2.9);色谱柱为XTerra MS C18柱。质谱检测采用正离子扫描,多反应监测模式。分别以自来水和污水作为基质,22种抗生素类药物的加标平均回收率分别为54.9%～130%和57.4%～138%,相对标准偏差(n=3)分别为2.85%～28.6%和2.02%～23.2%;方法的检出限为0.05～0.5ng/L。将建立的方法应用于北京市高碑店湖和小清河水样的分析,结果表明在两个水样中均有部分抗生素类药物检出。
文摘应用固相萃取结合高效液相色谱-串联质谱法,建立了同时测定环境水样中7种苯胺类化合物的检测方法.实验表明,以ZORBAX Eclipse Plus C18（3.5μm,2.1×150mm）色谱柱为分离柱,乙腈-水（2mmol/L甲酸铵）为梯度洗脱的流动相,在电喷雾质谱正离子模式下,7min内可以分离目标化合物;在1～200μg/L浓度范围内,7种苯胺类化合物的峰面积与质量浓度的线性关系良好;添加水平分别为0.8、4.0、20.0μg/L时,目标化合物的平均回收率分别为68.5%～102.2%、71.4%～89.4%、62.0%～78.3%,相对标准偏差均小于6.9%;利用本方法对长江南京段平水期（2014.4）、丰水期（2014.8）和枯水期（2014.12）的14个采样点的环境水样进行检测,检出4-硝基苯胺、2,6-二乙基苯胺、3,4-二氯苯胺和4-异丙基苯胺4种苯胺类化合物,且4-硝基苯胺在3个时期14个采样点均能检出;风险商值法评估长江南京段水体中4-硝基苯胺的生态风险为低生态风险.
文摘目的建立环境水样中大环内酯类、氟喹诺酮类、林可胺类、β-内酰胺类及四环素类5类共14种抗生素的固相萃取-高效液相色谱串联质谱法(SPE-HPLC-MS/MS)的测定方法。方法处理后的水样使用亲水-亲酯(HLB)固相萃取小柱进行目标物富集,以甲醇洗脱,洗脱液氮气吹干复溶,采用HPLC-MS/MS进样分析。以乙腈-0.1%甲酸水溶液为流动相梯度洗脱,CAPCELL PAK C18柱为分析柱,采用电喷雾正离子模式电离,多反应监测模式扫描,外标法定量。结果14种抗生素分别在(2.0~1000)μg/L浓度范围内,具有良好线性关系,方法检出限分别为(0.1~0.2)ng/L;分别以阴性水样及河水作为基质,14种抗生素的加标平均回收率分别为68.3%~96.1%和64.2%~113.3%,相对标准偏差(n=6)分别为1.7%~11.4%和1.5%~9.5%;方法应用于东莞市东江水的检测分析,结果检出6种抗生素,质量浓度范围分别为(2.49~46.7)ng/L。结论本法灵敏、准确,可应用于环境水样中多种抗生素的检测。
