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gc452金蟲(chóng) (著名寫(xiě)手)
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[求助]
蟲(chóng)友幫忙修改一下英文翻譯
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采用高效液相色譜(HPLC)-氫化物發(fā)生原子熒光光譜(HG-AFS)聯(lián)用測(cè)定了北京大氣顆粒物中As(III)、As(Ⅴ)、DMA(二甲基砷酸)和MMA(一甲基砷酸)的含量。研究了儀器條件、流動(dòng)相組成和梯度洗脫程序?qū)ι樾螒B(tài)分離的影響。實(shí)驗(yàn)結(jié)果顯示，在優(yōu)化的色譜與氫化原子熒光檢測(cè)條件下，采用pH均為6.0濃度為10 mM和200 mM的磷酸二氫銨為流動(dòng)相A和B，在1-3min內(nèi)用60%的A和40%的B洗脫使砷的四種形態(tài)達(dá)到最佳分離效。As(III)、As(Ⅴ)、DMA和MMA的方法檢出限為1.45、1.22、1.91和1.64 mg/L，回收率為90.5%~93.2%，相對(duì)標(biāo)準(zhǔn)偏差為0.38%~1.63%。該法靈敏度、精確度高，操作簡(jiǎn)單，適用于大氣顆粒物中砷的形態(tài)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. 麻煩蟲(chóng)友們幫幫忙修改一下，小弟英語(yǔ)水平太臭了。 謝謝了 |
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RXMCDM
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【答案】應(yīng)助回帖
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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 . |
gc452
3樓2014-02-25 22:11:29
feixiaolin
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【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
gc452: 金幣+30, ★★★很有幫助, 很滿意，謝謝你！全部給你 2014-02-25 21:39:13
gc452: 金幣+30, ★★★很有幫助, 很滿意，謝謝你！全部給你 2014-02-25 21:39:13
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采用高效液相色譜(HPLC)-氫化物發(fā)生原子熒光光譜(HG-AFS)聯(lián)用測(cè)定了北京大氣顆粒物中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. 研究了儀器條件、流動(dòng)相組成和梯度洗脫程序?qū)ι樾螒B(tài)分離的影響。 This paper investigated into the effect on the separation of arsenic species result by the instrument settings, mobile phase constitution and gradient elution. 實(shí)驗(yàn)結(jié)果顯示，在優(yōu)化的色譜與氫化原子熒光檢測(cè)條件下，采用pH均為6.0濃度為10 mM和200 mM的磷酸二氫銨為流動(dòng)相A和B，在1-3min內(nèi)用60%的A和40%的B洗脫使砷的四種形態(tài)達(dá)到最佳分離效。 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的方法檢出限為1.45、1.22、1.91和1.64 mg/L，回收率為90.5%~93.2%，相對(duì)標(biāo)準(zhǔn)偏差為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%. 該法靈敏度、精確度高，操作簡(jiǎn)單，適用于大氣顆粒物中砷的形態(tài)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樓2014-02-25 21:27:57
gc452
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4樓2014-02-27 09:57:21
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