To assess uncertainty of determination of MC-LR in environmental samples by solid phase extraction- ultra performance liquid chromatography- tandem mass spectrometry,the sources of the uncertainty were evaluated first...To assess uncertainty of determination of MC-LR in environmental samples by solid phase extraction- ultra performance liquid chromatography- tandem mass spectrometry,the sources of the uncertainty were evaluated firstly,and the expanded uncertainty was calculated finally.The results show that when MC-LR concentration in the water samples was 0.50 μg/L,the expanded uncertainty was 0.00628 μg/L(k=2).展开更多
研究了Fenton法氧化降解MC-LR的影响因素,包括反应时间、pH、H2O2浓度、Fe2+/H2O2、Fe3+等。正交试验表明,各个因素的影响作用为H2O2浓度>Fe2+浓度>反应时间>pH。最佳试验条件为:H2O2浓度1.8 mmol/L、Fe2+/H2O2=1∶18、初始pH=...研究了Fenton法氧化降解MC-LR的影响因素,包括反应时间、pH、H2O2浓度、Fe2+/H2O2、Fe3+等。正交试验表明,各个因素的影响作用为H2O2浓度>Fe2+浓度>反应时间>pH。最佳试验条件为:H2O2浓度1.8 mmol/L、Fe2+/H2O2=1∶18、初始pH=3、反应时间30 m in、反应温度(25±1)℃,在该条件下,MC-LR初始质量浓度为2.0μg/L时,去除率可达94.4%。展开更多
文摘To assess uncertainty of determination of MC-LR in environmental samples by solid phase extraction- ultra performance liquid chromatography- tandem mass spectrometry,the sources of the uncertainty were evaluated firstly,and the expanded uncertainty was calculated finally.The results show that when MC-LR concentration in the water samples was 0.50 μg/L,the expanded uncertainty was 0.00628 μg/L(k=2).
文摘研究了Fenton法氧化降解MC-LR的影响因素,包括反应时间、pH、H2O2浓度、Fe2+/H2O2、Fe3+等。正交试验表明,各个因素的影响作用为H2O2浓度>Fe2+浓度>反应时间>pH。最佳试验条件为:H2O2浓度1.8 mmol/L、Fe2+/H2O2=1∶18、初始pH=3、反应时间30 m in、反应温度(25±1)℃,在该条件下,MC-LR初始质量浓度为2.0μg/L时,去除率可达94.4%。
