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采用新型纳米二氧化硅/聚二甲基硅氧烷涂层搅拌棒结合高效液相色谱-傅里叶变换红外光谱法测定水中酚类异构体。

Determination of Phenols Isomers in Water by Novel Nanosilica/Polydimethylsiloxane-Coated Stirring Bar Combined with High Performance Liquid Chromatography-Fourier Transform Infrared Spectroscopy.

机构信息

Key Laboratory of Drinking Water Science and Technology, Chinese Academy of Sciences, Beijing, 100085, China.

Shenzhen Institute of Information Technology, Shenzhen, 518172, China.

出版信息

Sci Rep. 2017 Aug 18;7(1):8697. doi: 10.1038/s41598-017-09050-2.

DOI:10.1038/s41598-017-09050-2
PMID:28821791
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5562817/
Abstract

A novel nanosilica/polydimethylsiloxane (SiO/PDMS) coated stirring bar was adopted in the sorption extraction (SBSE) of phenols in water, and the high performance liquid chromatography-fourier transform infrared spectroscopy (HPLC-FTIR) was subsequently used to determination of phenol concentration. The SiO/PDMS coating was prepared by sol-gel method and characterized with respect to morphology and specific surface area. The results of field-emission scanning electron microscope (FE-SEM) and N adsorption-desorption as well as phenol adsorption experiments denoted that SiO/PDMS has larger surface area and better adsorption capacity than commercial PDMS. The extraction efficiency of phenol with SiO/PDMS coated stirring bar was optimized in terms of ion strength, flow rate of phenol-involved influent, type of desorption solvent and desorption time. More than 75% of phenol desorption efficiency could be kept even after 50 cycles of extraction, indicating the high stability of the SiO/PDMS coated stirring bar. Approximately 0.16 mg/L 2, 5-dimethylphenol (2, 5-DMP), which was 34-fold more toxic than phenol, was detected in water through HPLC-FTIR. However, 2, 5-DMP could be oxidized to 5-methy-2-hydroxy benzaldehyde after disinfection in drinking water treatment process. Therefore, the proposed method of SiO/PDMS-SBSE-HPLC-FTIR is successfully applied in the analysis of phenols isomers in aqueous environment.

摘要

采用新型纳米二氧化硅/聚二甲基硅氧烷（SiO/PDMS）涂层搅拌棒对水中酚类物质进行吸附萃取（SBSE），随后采用高效液相色谱-傅里叶变换红外光谱法（HPLC-FTIR）测定酚类物质浓度。SiO/PDMS 涂层采用溶胶-凝胶法制备，并对其形貌和比表面积进行了表征。场发射扫描电子显微镜（FE-SEM）、N 吸附-脱附和酚吸附实验结果表明，SiO/PDMS 具有比商业 PDMS 更大的比表面积和更好的吸附能力。从离子强度、含酚入口流速、解吸溶剂类型和解吸时间等方面优化了酚类物质的萃取效率。经过 50 次萃取循环后，仍能保持超过 75%的酚类物质解吸效率，表明 SiO/PDMS 涂层搅拌棒具有较高的稳定性。通过 HPLC-FTIR 检测到水中 2,5-二甲基苯酚（2,5-DMP）的浓度约为 0.16mg/L，其毒性比酚类物质高 34 倍。然而，在饮用水处理过程中消毒后，2,5-DMP 可氧化为 5-甲基-2-羟基苯甲醛。因此，成功地将 SiO/PDMS-SBSE-HPLC-FTIR 方法应用于水中酚类异构体的分析。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/1cbd65631f25/41598_2017_9050_Fig10_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/1cbd65631f25/41598_2017_9050_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/d66b642d6d7f/41598_2017_9050_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/e5e2dbc16d5b/41598_2017_9050_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/0b4dd57126b8/41598_2017_9050_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/8815670faedb/41598_2017_9050_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/b16b24977430/41598_2017_9050_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/5d3f14827fc4/41598_2017_9050_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/e1cd8ce957d7/41598_2017_9050_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/b2c0f666fd76/41598_2017_9050_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/23b06ae0f3fd/41598_2017_9050_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2b00/5562817/1cbd65631f25/41598_2017_9050_Fig10_HTML.jpg

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