Transverse Zeeman background correction method for air mercury measurement
By utilizing a natural mercury lamp, the transverse Zeeman background correction method, which is used for trace mercury measurement in air, is studied. In this paper, a natural mercury lamp is used as a light source, and is placed in a 1.78-T magnetic field. The lamp emits two linearly polarized li...
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| Published in | Chinese physics B Vol. 23; no. 10; pp. 458 - 463 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.10.2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 1741-4199 |
| DOI | 10.1088/1674-1056/23/10/107104 |
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| Abstract | By utilizing a natural mercury lamp, the transverse Zeeman background correction method, which is used for trace mercury measurement in air, is studied. In this paper, a natural mercury lamp is used as a light source, and is placed in a 1.78-T magnetic field. The lamp emits two linearly polarized light beams σ± and π of 253.65-nm resonance line, which are used as bias light and absorbing light, respectively. A polarization modulation system is used to allow σ± and π light beams to pass through alternately with a certain frequency. A multipath optical cell with 12-m optical path is used to increase optical distance. Based on the system described above, the influence caused by UV absorbing gases, such as NO2, SO2, acetone, benzene, and O3, is analyzed. The results show that it may reduce the detection limit when the concentrations of these gases exceed 83.4 ppm, 20.3 ppm, 142.3 ppm, 0.85 ppm, and 0.55 ppm, respectively. The detection limit of the system is calculated and can achieve up to 1.44 ng/m3 in 10 minutes. Measurements on mercury sample gas and air are carded out, and the measured data are compared with the data of RA-915 mercury analyzer （Russia）. The result shows that the correlation coefficient reaches up to 0.967. The experimental results indicate that the transverse Zeeman background correction method can be used to quantify trace mercury in air with high-precision. |
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| AbstractList | By utilizing a natural mercury lamp, the transverse Zeeman background correction method, which is used for trace mercury measurement in air, is studied. In this paper, a natural mercury lamp is used as a light source, and is placed in a 1.78-T magnetic field. The lamp emits two linearly polarized light beams σ± and π of 253.65-nm resonance line, which are used as bias light and absorbing light, respectively. A polarization modulation system is used to allow σ± and π light beams to pass through alternately with a certain frequency. A multipath optical cell with 12-m optical path is used to increase optical distance. Based on the system described above, the influence caused by UV absorbing gases, such as NO2, SO2, acetone, benzene, and O3, is analyzed. The results show that it may reduce the detection limit when the concentrations of these gases exceed 83.4 ppm, 20.3 ppm, 142.3 ppm, 0.85 ppm, and 0.55 ppm, respectively. The detection limit of the system is calculated and can achieve up to 1.44 ng/m3 in 10 minutes. Measurements on mercury sample gas and air are carded out, and the measured data are compared with the data of RA-915 mercury analyzer （Russia）. The result shows that the correlation coefficient reaches up to 0.967. The experimental results indicate that the transverse Zeeman background correction method can be used to quantify trace mercury in air with high-precision. By utilizing a natural mercury lamp, the transverse Zeeman background correction method, which is used for trace mercury measurement in air, is studied. In this paper, a natural mercury lamp is used as a light source, and is placed in a 1.78-T magnetic held. The lamp emits two linearly polarized light beams [sigma]+ or - and [pi] of 253.65-nm resonance line, which are used as bias light and absorbing light, respectively. A polarization modulation system is used to allow [sigma]+ or - and [pi] light beams to pass through alternately with a certain frequency, A multipath optical cell with 12-m optical path is used to increase optical distance. Based on the system described above, the influence caused by UV absorbing gases, such as NO sub(2), SC sub(2), acetone, benzene, and O sub(3), is analyzed. The results show that it may reduce the detection limit when the concentrations of these gases exceed 83.4 ppm, 20,3 ppm, 142,3 ppm, 0.85 ppm, and 0.55 ppm, respectively. The detection limit of the system is calculated and can achieve up to 1,44 ng/m super(3) in 10 minutes. Measurements on mercury sample gas and air are carried out, and the measured data are compared with the data of RA-915 mercury analyzer (Russia), The result shows that the correlation coefficient reaches up to 0,967, The experimental results indicate that the transverse Zeeman background correction method can be used to quantify trace mercury in air with high-precision. |
| Author | 李传新 司福祺 刘文清 周海金 江宇 胡仁志 |
| AuthorAffiliation | Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026, China Key Laboratory of Environmental Optics and Technology. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
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| Cites_doi | 10.1007/s00128-009-9723-7 10.1016/j.atmosenv.2005.08.029 10.1016/0016-7037(94)90046-9 10.1016/S1352-2310(99)00347-7 10.1007/BF00053284 10.1016/0009-2614(93)89169-I 10.1006/icar.1999.6322 10.1016/j.jqsrt.2008.02.010 10.1126/science.187.4174.348 10.1126/science.174.4007.404 10.1016/j.fuproc.2003.11.003 10.1016/S1352-2310(98)00289-1 10.1006/enrs.1998.3832 10.5194/amtd-1-481-2008 10.1016/S1352-2310(01)00104-2 10.1016/S1352-2310(97)00293-8 10.1579/0044-7447(2007)36[19:ASOPAU]2.0.CO;2 10.1021/ac60359a041 10.1016/j.atmosenv.2006.03.041 |
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| Notes | Li Chuan-Xin, Si Fu-Qi, Liu Wen-Qing, Zhou Hai-Jin, Jiang Yu, and Hu Ren-Zhi（ a） Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026, China b） Key Laboratory of Environmantal Optics and Technology. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China transverse Zeeman background correction, natural mercury lamp, magnetic field, multipath opticalcell By utilizing a natural mercury lamp, the transverse Zeeman background correction method, which is used for trace mercury measurement in air, is studied. In this paper, a natural mercury lamp is used as a light source, and is placed in a 1.78-T magnetic field. The lamp emits two linearly polarized light beams σ± and π of 253.65-nm resonance line, which are used as bias light and absorbing light, respectively. A polarization modulation system is used to allow σ± and π light beams to pass through alternately with a certain frequency. A multipath optical cell with 12-m optical path is used to increase optical distance. Based on the system described above, the influence caused by UV absorbing gases, such as NO2, SO2, acetone, benzene, and O3, is analyzed. The results show that it may reduce the detection limit when the concentrations of these gases exceed 83.4 ppm, 20.3 ppm, 142.3 ppm, 0.85 ppm, and 0.55 ppm, respectively. The detection limit of the system is calculated and can achieve up to 1.44 ng/m3 in 10 minutes. Measurements on mercury sample gas and air are carded out, and the measured data are compared with the data of RA-915 mercury analyzer （Russia）. The result shows that the correlation coefficient reaches up to 0.967. The experimental results indicate that the transverse Zeeman background correction method can be used to quantify trace mercury in air with high-precision. 11-5639/O4 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| SubjectTerms | Absorption Analyzers Beams (radiation) Lamps Light beams Mercury lamps Nitrogen dioxide Optical paths Resonance lines 光学元件 塞曼 校正方法 汞测量 空气测量 紫外线吸收 线性偏振 调制系统 |
| Title | Transverse Zeeman background correction method for air mercury measurement |
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