本帖最後由 sunsunsun 於 2012-5-4 12:24 編輯
QUOTE FROM http://www.hc-sc.gc.ca/ewh-semt/ ... urane/index-eng.php
好年冬的資料
Carbofuran好年冬 (C12H15NO3) is a carbamate insecticide and nematocide used for the control of a variety of soil-dwelling and foliar-feeding pests on many fruit and vegetable crops. Between 100 000 and 500 000 kg are used annually in Canada.1 Carbofuran has a vapour pressure of 2.7 x 10-3 Pa at 33°C; [1]its solubility in water is 700 mg/L at 25°C.2 Its log octanol-water partition coefficient is reported to range from 1.60 to 2.32;3 therefore, carbofuran is not likely to bioaccumulate significantly.
1. 即係話好年冬唔係好溶水, 佢係泥中會慢慢溶出來, 你加水佢唔會一次過全部溶哂
Carbofuran is degraded in soil by[2] hydrolysis, microbial action and, to a lesser extent, photo-decomposition. Its persistence is dependent upon pH, soil type, temperature, moisture content and the microbial population.4 Degradation products in soil include carbofuran phenol, 3-hydroxycarbofuran and 3-ketocarbofuran; field studies have indicated a [3]half-life of 26 to 110 days in soil.5 Carbofuran may leach significantly, although leaching may not occur in highly organic soils.5
2. 即話佢一溶係水就會慢慢分解, 微生物同陽光都可以幫手分解呢隻野,
3. 26-110日(中位數係2個月), 先會減少一半既份量, 加一次係可以用到半年
100% --> 50% (~2個月)
50% --> 25% (~2個月)
25% --> 12.5% (~2個月)
健康影響
[4]Carbofuran is rapidly and completely absorbed by the gastrointestinal tract. It is quickly metabolized by hydrolysis, oxidation and conjugation; the major metabolites include 3-hydroxycarbofuran, 3-keto-carbofuran, carbofuran phenol, 3-hydroxycarbofuran phenol and 3-ketocarbofuran phenol.5. The main route of excretion is in the urine as conjugates of glutathione.11 Half-lives for elimination of carbofuran and 3-hydroxycarbofuran in the rat of 29 and 64 minutes have been reported.12 ..............
4. 好年冬係好易從食道吸收, 對於人來講係好危, 如果一過量就好易令身體到一個中毒既水平, 咁即係搞呢隻野過陣一定要帶手套, 食左入身體都大件事,
5. 佢可以係尿液排出身外, 咁即係佢唔會有好強既累積性, 文章下邊有提, 即係話, 長期正確使用(用手套), 就算唔小心吸收左少少, 都唔會對健康有好大影響
以上是本人的一點愚見, 如有錯誤, 還望指正, 不勝感激! 多謝 |