| 苦味酸测定中关键问题的研究 |
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| 引用本文： | 王玉祥,吴莹,张宗祥,程滢,薛锐,王厚俊.苦味酸测定中关键问题的研究[J].环境监控与预警,2020,12(1):41-43. |
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| 作者姓名： | 王玉祥 吴莹 张宗祥 程滢 薛锐 王厚俊 |
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| 作者单位： | 江苏省泰州环境监测中心,江苏 泰州,225300 |
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| 基金项目： | 2007年度国家环境保护标准制修订基金资助项目(917) |
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| 摘 要： | 目前测定苦味酸的国标方法为《生活饮用水标准检验方法有机物指标》(GB/T 5750.8—2006)中的衍生物-液液萃取-气相色谱法,在实际测试过程中,发现水样pH值和基质效应会影响苦味酸测定。当pH值为8~12时,生成的氯化苦响应强度变化不大;在pH约为13时,响应强度最大。水质中除腐殖酸、硝基甲烷及2,4,6-三硝基甲苯会影响苦味酸测定外,硝基酚类和甲基酚类同样起到正干扰作用,因此,国标方法不能全面和准确地测定水中的苦味酸含量。
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| 关 键 词： | 苦味酸 PH值 基质效应 衍生物-液液萃取-气相色谱法 |
| 收稿时间： | 2019/7/19 0:00:00 |
| 修稿时间： | 2019/8/5 0:00:00 |
Research on Key Problems in Determination of Picric Acid |
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| WANG Yu-xiang,WU Ying,ZHANG Zong-xiang,CHENG Ying,XUE Rui,WANG Hou-jun.Research on Key Problems in Determination of Picric Acid[J].Environmental Monitoring and Forewarning,2020,12(1):41-43. |
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| Authors: | WANG Yu-xiang WU Ying ZHANG Zong-xiang CHENG Ying XUE Rui WANG Hou-jun |
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| Institution: | (Jiangsu Taizhou Environmental Monitoring Center,Taizhou,Jiangsu 225300,China) |
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| Abstract: | At present,the national standard method for the determination of picric acid is the derivative-liquid liquid extraction-gas chromatography in the Organic Indicators of the Standard Test Method for Drinking Water(GB/T 5750.8—2006).In the actual test,it was found that the pH value and matrix effects of water samples affected the determination of picric acid.When the pH value were in the range of 8~12,the response of chloropicrin showed little change,while the pH value was about 13,the maximum response was obtained.In addition to humic acid,nitromethane and 2,4,6-trinitrotoluene in water,nitrophenols and methyl phenols also play a positive role in the determination of picric acid.Therefore,the national standard method cannot comprehensively and accurately determine the content of picric acid in water. |
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| Keywords: | Picric acid pH value Matrix effects Derivative-liquid liquid extraction-gas chromatography |
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