Photolysis Rate of the Herbicide Naproanilide Exposed to Sunlight in Water
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- FUNAKOSHI Yasunobu
- Life Science Laboratory, Central Research Institute, Mitsui Toatsu Chemical, Inc.
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- NAMPO Toshio
- Life Science Laboratory, Central Research Institute, Mitsui Toatsu Chemical, Inc.
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- ENOMOTO Midori
- Life Science Laboratory, Central Research Institute, Mitsui Toatsu Chemical, Inc.
Bibliographic Information
- Other Title
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- 除草剤 naproanilide の水中での太陽光による光分解速度
- 除草剤naproanilideの水中での太陽光による光分解速度〔英文〕
- ジョソウザイ naproanilide ノ スイチュウ デ ノ タイヨウコウ
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Abstract
The photolysis rate (conversion per unit energy) of naproanilide (2-(2-naphthoxy)-propionanilide) in water was related with sunlight energy (below 340nm). This relation was expressed by the following equation under seasonal sunlight conditions in an FRA-greenhouse. P=P′×exp (-K×E′), where P is the concentration of remaining naproanilide, P′ is an initial concentration of naproanilide, K is a photolysis constant and E′ is the energy (cal/cm2) of sunlight (below 340nm). The energy required to photodecompose the 50% of the starting material (PL50; cal/cm2) was expressed by the following equation. PL50=0.693/K. The PL50 value of naproanilide was 10.3mcal/cm2 (below 340nm) and reproducible in the FRA-greenhouse. Since the half-life period of naproanilide by photolysis depends on experimental conditions, such as weather and solar altitude, it would be better to use the PL50 value rather than the half-life period to express the reliable photostability of naproanilide. The photolysis rate of naproanilide was pH-independent in water, and slower in O2-free water than in natural water. Sunlight energy (below 340nm) was measured with a UV radio meter UVR-254 (Tokyo Kagaku Kikai Co., Ltd.) in the FRA-greenhouse at Chigasaki City (139°30′ east, 35°29′ north). These data are useful to estimate the photostability of naproanilide in water under natural sunlight conditions.
Journal
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- Journal of Pesticide Science
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Journal of Pesticide Science 13 (2), 205-212, 1988
Pesticide Science Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205209049856
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- NII Article ID
- 110001712183
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- NII Book ID
- AN00196227
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- ISSN
- 03851559
- 13490923
- 1348589X
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- NDL BIB ID
- 3185771
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
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- Abstract License Flag
- Disallowed