Conversions
- Thread starter Starling
- Start date
Thank you for the help! I'm trying to help out my dad figure out some conversions of
a foriegn chemical product. He has a U.S. product that he uses that has
39mg/mL of ethephon and a foreign product that contains 480 g/l of ethephon. He was
told to use 0.5 ml/lit of the foreign product but he can only use the U.S. product so he
needs to know the equal conversion of 0.5 ml/lit in the U.S. product he has. Sorry if
this is confusing but I wasnt quite sure how to word this. Thank you for any more help
anyone can offer!
a foriegn chemical product. He has a U.S. product that he uses that has
39mg/mL of ethephon and a foreign product that contains 480 g/l of ethephon. He was
told to use 0.5 ml/lit of the foreign product but he can only use the U.S. product so he
needs to know the equal conversion of 0.5 ml/lit in the U.S. product he has. Sorry if
this is confusing but I wasnt quite sure how to word this. Thank you for any more help
anyone can offer!
- Joined
- Apr 12, 2005
- Messages
- 11,339
Starling said:
gram/litre = (gram/1000)/(litre/1000) = mg/ml
0.5 ml / litre-water * 480 g / litre =
0.0005 litre / litre-water * 480 g / litre =
0.0005 * 480 g / litre-water =
0.24 g / litre-water
That is a much heavier concentration of pesticide than in the U.S. product. It is more than 10 TIMES the concentration!!
x * 39 mg / ml = 0.24 g / litre-water
x = (0.24 g / litre-water) / (39 mg / ml)
x = (0.24 g / litre-water) / (0.039 g / ml)
x = 6.153 ml/ litre-water
Checking VERY CAREFULLY, since Federal Standards appear to allow no more that 10 PPM residue on ANYTHING.
0.5 ml/litre-water * 480 g/litre = 0.24 gm / litre-water
6.153 ml/ litre-water * 39 mg/ml = 0.239967 gm / litre-water
It's a drop or two of the 480 or a little more than a teaspoon of the 39 to achieve the same concentration in one litre of water (or other appropriate dilution, of course.)
Don't mess with this stuff unless you know what you are doing.
Symptoms of Poisoning with Organophosphorus Compounds
- Excessive salivation, sweating, rhinorrhea and tearing.
- Muscle twitching, weakness, tremor, incoordination.
- Headache, dizziness, nausea, vomiting, abdominal cramps, diarrhea.
- Respiratory depression, tightness in chest, wheezing, productive cough, fluid in lungs.
- Pin-point pupils, sometimes with blurred or dark vision.
- Severe cases: seizures, incontinence, respiratory depression, loss of consciousness.
- Cholinesterase inhibition.
Note: Other conditions may cause similar symptoms.
Thank you so much tkhunny!!!
My dad and I were confused last night trying to figure out these conversions!
He has to spray a very large crop of plants and any wrong measurement can cause
many many problems. So thank you once again for your time. It is greatly
appreciated!
My dad and I were confused last night trying to figure out these conversions!
He has to spray a very large crop of plants and any wrong measurement can cause
many many problems. So thank you once again for your time. It is greatly
appreciated!
- Joined
- Apr 12, 2005
- Messages
- 11,339
The REAL trick is realizing that mg/ml is directly comparable to g/l.
After that, a simple proportion would have done the trick.
0.5 ml/litre-water * (480/39) =
0.5 ml/litre-water * (12.30769231) =
6.153846 ml/litre-water
I hope your flowers blossom after the last frost and your fruits ripen when you are able to harvest them.
After that, a simple proportion would have done the trick.
0.5 ml/litre-water * (480/39) =
0.5 ml/litre-water * (12.30769231) =
6.153846 ml/litre-water
I hope your flowers blossom after the last frost and your fruits ripen when you are able to harvest them.