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濃度,容量,ppm與換算單位
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註冊時間: 2005-09-08
文章: 2436

發表於: 2005-11-03, 15:25    文章主題: 濃度,容量,ppm與換算單位  

當你想要做某些魚病的處理時
你可以參考以下的數據
中英對照讓您一目了然



濃度與容量,ppm,單位換算
ppm 百萬分之一( 1 part per million) = 1 mg/kg = 0.0001% = 1 ug/g
ppm就是 1000公升的水含1 公克的某物質
1 gm = 1000mg
所謂 1ppm即等於 1公升的水含1 毫克(mg)的某物質
例如: 100公升的水加入 200-300mg(0.2~0.3mg)的藥物
即等於2ppm-3ppm



濃度
1% = 100ml 的水加入 1gm 的物質
即 1 公升(l),加入 10gm 某物質
例如: 鹽
0.3 % = 100公升的水加入300 公克的鹽
或 1公升的水加入 3 公克的鹽


魚缸的容量
長 × 寬 × 高 ÷ 1000



單位換算
1 mg = 0.001 gm (1000 mg = 1 gm)
1 gm = 0.001 kg (1000 gm = 1 kg)
1 ml = 0.001 公升 (1000ml = 1 公升)


Useful conversions are:
ppm = mg/litre i.e. 5 ppm = 5 mg / litre
mg / litre x 3.785 = mg / gall (US) i.e 5 mg / litre = 18.9 mg / gall (US)
mg/ litre x 4.546 = mg / gall (UK) i.e 5 mg / litre = 22.7 mg / gall (UK)
To convert imperial gallons to US gallons multiply by 1.2

Other useful figures:
1 ounce = 28.35 grams

1% solution =
10 ml per litre
10 gram per litre
38 gram per gall (US)
45 gram per gall (UK)


ps.
(US)=美國..........即美制
(UK)=英國..........即英制
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