'ǰ'̶ ִ. ܼ ǰ ƴϴ. ̴. ū ϴ ̴. ȯ ȯڰ þ ִ. 2006 11951, 2007 15563 6 9464 ߴ. ȯڴ ȴ.
ǰ ȫ, ߺ ϴ 찡 þ ִ. 'ƴ '̶ . ڼ 鿩ٺ ƴ ƴ϶ ' ´' Ҹ ƴ .
켱 '' . Ŀ ȵǴ ȭչ 쿡 ü Һ ȴ. Һ ϰ 忡 , ջŰ ȴ. ̰ ߱ Ƶ ̴.
츮 Ե ÷̴. ۿ . ľû Hü ڿ 137ppm ü 30kg ̰ Ϸ 20 Ծ طӴٰ ̴. ߱ 2500ppm̾.
ĵ öƽ(-˵) ı Ȯƴ. ôϰ ߿ ȭ⳪ ¿ ʵ ϸ ذ . ı ϴ ߰ſ ̷ ˵尡 Ǵ 쵵 ִٴ ɼ ƴ.
˵尡 ΰ. ˷ ߾Ϲ ƴѰ. ˵ ݶ(8ppm) (0.7ppm), , ִ. ˵ 츮 ӿ ӿ Ѵ. ̷ 쿡 ü ذ .(߷ , ٻʴ )
츮 ϴ Ժ, 縮, ұ. Ե ۿ ̱ ij 1970 ǰ ִٸ ùδü ֱ ߴ. ϴٰ ˷ ƽǸ ٷ 뿡 ۿ( ˾) ̱ ų 7600 ״ ȴٰ Ѵ.
츮 ֺ ִ ĵ () ϰ ִ. ǰ ٴ ֿ, ְ Ű ߾Ϲ ִٴ ̴. . ǴĴ.
ֱ 翡 ǰ õ ڷ ij. ϳ Ŀǿ ߾Ϲ ߰ߵƴٴ ڷ. ȸ ŷе Ծü . ߾Ϲ ؿ ġ ʴ ̷̾. ĿǴ ī ߾ϰ Ǵ ǰ ϳ.
ǿ ڷḦ AI(÷翣) ( Ը )ϸ 2 5̻ ִٴ ڷḦ . ¿ ϶ ̰ AI ʴ Ѱǵ . ̸ ִ Ȯ ŵ . ɸ 翬 ġ. ŷеǴ ״ ܰ (-ǵ) ̴.
Ǹ ' ϴ ȸ' ƴ϶ 'ǰ ϴ ȸ' .