| Project/Area Number |
61304039
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Hygiene
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
IKEDA Masayulki Tohoku University School of Medicine, 医学部, 教授 (00025579)
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| Co-Investigator(Kenkyū-buntansha) |
NAKATSUKA Haruo Tohoku University School of Medicine, 医学部, 助手 (70164225)
SUZUKI Hideyoshi Fukushima Medical College, 助教授 (30045637)
TAKEUCHI Yasuhiro Nagoya University School of Medicine, 医学部, 教授 (90022805)
HARA Ichiro Kansai Medical University, 教授 (10148497)
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1987: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1986: ¥4,000,000 (Direct Cost: ¥4,000,000)
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| Keywords | Petroleum distillate solvent / capillary gaschromatography / benzene / n-hexane / 家庭用シミヌキベンジン / ガスクロマトグラフィー / 自動分析 |
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| Research Abstract |
Among the 7 types of natural solvent mixtures listed as third class solvents in the Ordinance on Prevention of Prganic Solvent Poisoning, 5 types (134 samples) of petroleum distillate solvents (PDS) were collected from various parts of Japan in 1986 and 1987, and analyzed for n-hexane, benzene and 5 other aromatics by capillary gaschromatography. In addition, 3 samples of turpentine oil, 1 sample of reagent grade coal tar naphtha, 14 samples of JIS solvent gasoline of various sorts and 4 samples of drug store-bought spot remover were analyzed for reference. The mean concentrations of n-hexane and benzene in total PDS samples were 2.57 % and 0.41 %, respectively, but the concentrations of the 6 chemicals studied dispersed over very wide ranges and it was not possible to identify typical compositions even after the results were grouped according to use patterns. From chromatograms, it was possible to classify the PDS into two groups of "low" and "high" boiling point PDS, with higher risk for the former to contain n-hexane and benzene. All rubber surface sofetener samples examined belonged to the former, whereas all dry-cleaning solvents to the latter. Thinner-cleaner samples for printing and painting distributed in two subgroups evenly. Turpentine oil and coal tar naphtha samples analyzed contained no n-hexane nor benzene at all. Both n-hexane and benzene (up to 13.7 and 4.2 %, respectively) were detected in spot removers.
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