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seek
Pain never felt so wonderful.



Registered: 08/18/08
Posts: 789
Loc: Brooklyn, NY
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A novel method of weighing milligram doses that I was thinking about.
#9933465 - 03/08/09 01:26 PM (14 years, 11 months ago) |
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With a large enough set of milligram weights, why couldn't you weigh milligrams. Of course the weighing would not be exact, but -- if you verified and calibrated the scale repeatedly to ensure that it can differentiate between 25 mg and 10 mg for instance, then I think you're in the clear.
If I put exactly 1.99 grams on a scale with a 1 gram resolution, will it weigh 1 g or 2 grams? If it weighs 1g and I put a 0.01 gram (10 milligrams) weight on it, and it goes to 2 grams, doesn't that mean I've found a way to weigh milligrams? Even more so if I put a 5mg weight on it and it stays at 1. Then I know for sure that this can tell the difference between 5mg and 10mg, but only when putting one of those weights will tip the scale to the next gram. Not inbetween or anything like that. That is good enough for those of us strapped for cash.
I'm positive that you could test this if you bought a set of milligram weights that they sell for calibration.
I have no idea if it would work for weights as small as 1mg, but it's worth a shot for 10mg increments, do you not agree?
Start with a set of known weights: 500mg, 400mg, 50mg, 25mg, = 975 mg.
for instance.
Now. Put a 10mg weight on that, remove it, then put a second 25mg weight on it. Do this repeatedly. If you see that the 10mg NEVER EVER makes the scale go to 1g, but the 25mg ALWAYS does, then you know that you can use this weigh milligrams.
Put 995mg on the scale. Does it still say zero? Put a 5mg weight on it. Does it now say 1 gram? What happens if you put 1-4mg on it? Does it always remain at 0 if you put 1-4mg, but always go to 1g if you put the 5mg? Then you have a winner. A very accurate winner at that.
Either that, or use a balance and compare.
If this is possible (I have not tested yet), then whoo hoo!
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MindFood
Chemist


Registered: 11/05/05
Posts: 617
Loc: England
Last seen: 5 years, 9 months
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Re: A novel method of weighing milligram doses that I was thinking about. [Re: seek]
#9933491 - 03/08/09 01:32 PM (14 years, 11 months ago) |
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Unfortunately that method won't work a scale that has a 1 gram resolution will not be sensitive enough to differentiate between 1.99g and 2.00g it will read 2g for both. Anything past 1.5g and it will read 2g, the sensitivity is probably more like 50mg, meaning you could have 1.45g and then add 50mg to make it jump to 2g from 1g.
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MindFood
Chemist


Registered: 11/05/05
Posts: 617
Loc: England
Last seen: 5 years, 9 months
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Re: A novel method of weighing milligram doses that I was thinking about. [Re: MindFood]
#9933494 - 03/08/09 01:33 PM (14 years, 11 months ago) |
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Why not just buy a scale accurate to 1mg there pretty damn cheap now, $20 will get you one easy enough.
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seek
Pain never felt so wonderful.



Registered: 08/18/08
Posts: 789
Loc: Brooklyn, NY
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Re: A novel method of weighing milligram doses that I was thinking about. [Re: MindFood]
#9933500 - 03/08/09 01:34 PM (14 years, 11 months ago) |
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That is unfortunate, but if the sensitivity is verified to be consistent (regardless of how high or low it is) for weighing milligrams, then it is still useful. A scale with a resolution of 50mg is still useful. Not as useful as a 10mg scale would be though. Hmm.
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seek
Pain never felt so wonderful.



Registered: 08/18/08
Posts: 789
Loc: Brooklyn, NY
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Re: A novel method of weighing milligram doses that I was thinking about. [Re: MindFood]
#9933501 - 03/08/09 01:35 PM (14 years, 11 months ago) |
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Quote:
MindFood said: Why not just buy a scale accurate to 1mg there pretty damn cheap now, $20 will get you one easy enough.
Wait, are you serious? Where? All the ones I've seen were $100 for something with a 1mg resolution. Where the hell can I buy such a thing?
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muistrue
Inspired by the mystery


Registered: 03/20/05
Posts: 12,899
Loc: Behind the Redwoods
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Re: A novel method of weighing milligram doses that I was thinking about. [Re: seek]
#9933518 - 03/08/09 01:39 PM (14 years, 11 months ago) |
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Ebay has them for $20 plus shipping.
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suburbanned
Stranger
Registered: 02/20/08
Posts: 2,810
Last seen: 13 years, 6 months
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Re: A novel method of weighing milligram doses that I was thinking about. [Re: muistrue]
#9933926 - 03/08/09 02:57 PM (14 years, 11 months ago) |
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