Jennifer.
At 00:49 15/11/98 -0600, you wrote:
>and show your work :-)
>1) Formaldehyde at 1031 g/l = 1.031 g/ml (I love the metric system, gallons
>really suck)
>2) You need 25 parts per million which translates to 25 milligrams per liter
>(1000 grams = 1 liter, 1000 mg = 1 gram 1 million milligrams = 1 liter
or 1
>mg/liter = 1ppm
>
>100 liters at 25 mg/liter = 2500 mg or 2.5 grams
>2.5 grams needed divided by 1.031 grams/ml of formaldehyde = 2.43 ml
>
>I know Adrian will be careful with formaldehyde but for the rest of you that
>may be unaware this is really dangerous stuff. You can become incredibly
>allergic to it and like other chemicals can potentially cause you to pick up
>other allergies to unrelated proteins. It is also a known cancer causing
>agent. In the chemical industry most reputable companies require their
workers
>to go to training classes on the proper handling and disposing of amounts
even
>much smaller than the amount that Adrian is planning to use!
>
>Gary Lange
>
>----------
>> From: Adrian Tappin <atappin at ecn.net.au>
>> To: rainbowfish at pcug.org.au
>> Subject: [RML] Chemical dose
>> Date: Saturday, November 14, 1998 9:51 PM
>>
>> I'm trying to calculate the dose rate of formaldehyde (1031 g/l) for
>> treating 100 litres of water at a delivered rate of 25 ppm.
>>
>> I came up 2.4 mil per 100 litres (approx).
>>
>> Would someone like to check if I have calculated it correctly
>>
>> Thanks,
>> Adrian.
>>
>> Adrian R. Tappin
>> "Home of the Rainbowfish"
>> http://www.ecn.net.au/~atappin/home.htm
>
>