I had troubles the other day using a balance that goes to the tenth of a milligram place (i.e. .0005 vs .001 g), when trying to determine how much solid I transferred. I would take some amount of mg, record it, and then set it aside. I'd take the receiving flask, tare it, and add the solid to said flask. The # I would get would either be wildly lower or slightly lower. I am very sure I am not mispouring anything.
So I am wondering, is it possible these sensitive balances cannot handle things with larger masses, or if the receiving flask is not perfectly flat, would that mess up the mass? Similarly, would the location where I put the flask or weigh paper on the balance matter (e.g. dead center, to the left, right, etc.)? Is there another thing I could do? technically I could take the difference in weigh paper with solid vs without, but that doesn't tell me what got into the receiving flask.