I have a digital scale that reads in the format 0.00 and in grams. I need to measure 4.5 milligrams. Would I still be able to use this scale? Shouldn't it read 0.45 g for 4.5 mg's? I'd settle for 4 milligrams instead of 4.5.
When you want to have milligrams you must to multiply grams by 1000, so 4.5 mg equals 0.0045 and you will not see it in your scale.
Good luck
Mustafa
Why don´t you scale it up - if possible and not too expensive - by a factor of e.g. 1000 - meaning that you weigh in 4.5 grams and then disolve it in 1000 fold more buffer/water or whatever you need. Other than that - no chance with that scale.
Best regards.
Hi, unfortunately you can not use that balance with the scale of 0.00 g to measure 4.5 mg since it's max accuracy is 0.01g which is equal to 10 mg that is higher than 4.5 mg. Regards.
You need to take into account another factor which is the minimum weight the scales can still measure accurately.
It is usually ~10X the minimum weight the scale show.
So for a 0.00g scale, the minimum weight you can measure accurately is ~0.1g.
But this number should be written on your scale next to the minimum and maximum weights.
Change your instrument, the colleques gave you the reasons. One small chance for you. Multiply your measuring time by a factor of 100, if possible. If your instrument is just measuring weight, no idea!
Dear Ellie Major,
Analytically you must use a suitable balance for this purpose but if it is not easily accessible, (IF POSSIBLE) you can prepare a 10X, 20X or other concentrated solution of the chemical substance and add accurately adequate volume of the concentrated solution to your formulation equal to 4.5 mg.
You said that you want to measure the weight of 4.5 g with a scale has 10 g resolution which is unfortunately impossible. The scale resolution should be lower than the Measurand and you should know that the scale resolution is one of the most significant uncertainty parameters associated with your measurements
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