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gc452金虫 (著名写手)
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[求助]
虫友帮忙修改一下英文翻译
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采用高效液相色谱(HPLC)-氢化物发生原子荧光光谱(HG-AFS)联用测定了北京大气颗粒物中As(III)、As(Ⅴ)、DMA(二甲基砷酸)和MMA(一甲基砷酸)的含量。研究了仪器条件、流动相组成和梯度洗脱程序对砷形态分离的影响。实验结果显示，在优化的色谱与氢化原子荧光检测条件下，采用pH均为6.0浓度为10 mM和200 mM的磷酸二氢铵为流动相A和B，在1-3min内用60%的A和40%的B洗脱使砷的四种形态达到最佳分离效。As(III)、As(Ⅴ)、DMA和MMA的方法检出限为1.45、1.22、1.91和1.64 mg/L，回收率为90.5%~93.2%，相对标准偏差为0.38%~1.63%。该法灵敏度、精确度高，操作简单，适用于大气颗粒物中砷的形态分析研究。 A method of High-performance liquid chromatography coupled with hydride generation and atomic fluorescence spectrometry (HPLC-HG-AFS) determination has been developed for analysis of As(III), As(Ⅴ), dimethylarsinic acid (DMA) and monomethylarsonic acid (MMA) in atmospheric particulate matters in Beijing. Discusses instrument conditions, mobile phase, gradient elution conditions on the influences for separation of arsenic speciation. Under the optimized chromatographic and spectrographic conditions, the arsenic species were baseline separated by using the best mobile phase are A 10 mM NH4H2PO4 (pH=6.0) and B 200 mM NH4H2PO4 (pH=6.0), and the best gradient elution conditions are mobile phase A 60% and mobile phase B 40% in 1-3 min. The detection limit of As(III), As(Ⅴ), DMA and MMA are 1.45, 1.22, 1.91 and 1.64 mg/L. The recovery and RSD are 90.5%~93.2% and 0.38%~1.63%. It is used in the analysis of As(III), As(Ⅴ), DMA and MMA in atmospheric particulate matters with the result is satisfactory. 麻烦虫友们帮帮忙修改一下，小弟英语水平太臭了。 谢谢了 |
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feixiaolin
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gc452: 金币+30, ★★★很有帮助, 很满意，谢谢你！全部给你 2014-02-25 21:39:13
gc452: 金币+30, ★★★很有帮助, 很满意，谢谢你！全部给你 2014-02-25 21:39:13
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采用高效液相色谱(HPLC)-氢化物发生原子荧光光谱(HG-AFS)联用测定了北京大气颗粒物中As(III)、As(Ⅴ)、DMA(二甲基砷酸)和MMA(一甲基砷酸)的含量。 A method of High-performance liquid chromatography coupled with hydride generation and atomic fluorescence spectrometry (HPLC-HG-AFS) was used for analyzing the contents of As(III), As(Ⅴ), dimethylarsinic acid (DMA) and monomethylarsonic acid (MMA) in atmospheric particulates in Beijing. 研究了仪器条件、流动相组成和梯度洗脱程序对砷形态分离的影响。 This paper investigated into the effect on the separation of arsenic species result by the instrument settings, mobile phase constitution and gradient elution. 实验结果显示，在优化的色谱与氢化原子荧光检测条件下，采用pH均为6.0浓度为10 mM和200 mM的磷酸二氢铵为流动相A和B，在1-3min内用60%的A和40%的B洗脱使砷的四种形态达到最佳分离效。 With the optimized chromatographic and spectrographic conditions, it was showed by our experiment that the best condition for arsenic species separating is mobile phase are A 10 mM NH4H2PO4 (pH=6.0) and B 200 mM NH4H2PO4 (pH=6.0), and the gradient elution conditions are mobile phase A 60% and mobile phase B 40% in 1-3 min. As(III)、As(Ⅴ)、DMA和MMA的方法检出限为1.45、1.22、1.91和1.64 mg/L，回收率为90.5%~93.2%，相对标准偏差为0.38%~1.63%。 The detection limit of As(III), As(Ⅴ), DMA and MMA are 1.45, 1.22, 1.91 and 1.64 mg/L. The recovery and RSD are 90.5%~93.2% and 0.38%~1.63%. 该法灵敏度、精确度高，操作简单，适用于大气颗粒物中砷的形态分析研究。 This method is characteristic by its sensitivity, high accuracy and simple operation, it suitable for speciation analysis of arsenic in atmospheric particulates. |
2楼2014-02-25 21:27:57
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High performance liquid chromatography-hydride generation-atomic fluorescence spectrometry (HPLC-HG-AFS)method has been developed for the content analysis of atmospheric particulate matter As (III), As (Ⅴ), DMA (dimethyl arsenate) and MMA (a MMA) in Beijing .The instrument conditions, mobile phase composition and gradient elution program impact on arsenic speciation separation were discussed and results showed that under optimized chromatographic and hydride generation atomic fluorescence detection condition, the arsenic species were baseline separated by using 10 mM and 200 mM ammonium dihydrogen phosphate (pH 6.0) as mobile phase A and B,eluting in 1-3min with 60% of A and 40% of B.The detection limit of As(III), As(Ⅴ), DMA and MMA are 1.45, 1.22, 1.91 and 1.64 mg/L.The recovery rate was 90.5% ~ 93.2% and the relative standard deviation was 0.38% ~ 1.63%. The method is sensitive, high accurate, simple to operate, and suitable for arsenic speciation separation in atmospheric particulate matters . |
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gc452
3楼2014-02-25 22:11:29
gc452
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4楼2014-02-27 09:57:21
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