A multi-reflection Raman cell for studying dilute aqueous solutions |
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| Affiliation: | 1. Institute for Molecular Science, Okazaki National Research Institutes, Myodaiji, Okazaki 444, Japan;2. Department of Chemistry, Faculty of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 724, Japan;1. Zhanjiang Branch Company, CNOOC, Zhanjiang, 524057, Guangdong, China;2. SINOPEC Petroleum Exploration and Production Research Institute, Beijing, 100083, China;1. Department of Epidemiology, School of Public Health and Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Medical College of Soochow University, Suzhou, China;2. Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA, USA;3. Department of Medicine, Tulane University School of Medicine, New Orleans, LA, USA;4. Department of Neurology, Affiliated Hospital of Nantong University, Nantong, China;5. Department of Neurology, Affiliated Hospital of North China University of Science and Technology, Tangshan, China;6. Department of Epidemiology, School of Public Health, Taishan Medical College, Taian, China;7. Department of Neurology, Kerqin District First People''s Hospital of Tongliao City, Tongliao, China;8. Department of Neurology, Affiliated Hospital of Xuzhou Medical College, Xuzhou, China;1. Department of Thoracic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea;2. Department of Oncology, Aarhus University Hospital, Aarhus, Denmark;3. Department of Pathology & Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea;4. Merck Research Laboratories, Merck & Co Inc, Kenilworth, NJ;5. Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea;6. Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark;7. Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea |
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| Abstract: | A cell for multi-reflection Raman measurements was constructed. This device consists of two rectangular prisms and, when applied to a rectangular sample cell, Raman signals were enhanced by seven to ten times compared with the single-pass measurement for a transparent solution. This system is readily applicable to studies of dilute aqueous solutions with low refractive indices. With this device, the CH stretching Raman bands of benzene in water were observed with sufficiently high S/N ratios. Combination of the multi-pass cell with an optical-fiber light-collecting device enabled us to determine reproducibly the shifts of Raman bands from some reference state with an accuracy of 0.006 cm−1. |
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