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Vials How to get neat material out of the vial? Even though it doesn't look like the product is in there, it is small amount (5-10 mg) of powder ofter are spread over the surface of the vial and cap. If the chemical is a liquid it may coat the wall as a thin layer invisible to the eys. To recover all of the contents contained in a vial of neat material please use the procedure described below.
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Wipe the outside of the vial (containing the standard) clean and dry (including the cap)
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Weigh the entire unit on an analytical balance. Record the weight to the nearest 0.1 mg
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Carefully transfer the contents to a volumetric flask using a suitable
solvent. Rinse the cap and vial several times to assure a complete
transfer
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Dry inside and outside of the vial and cap with mild heat or inert gas
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Weigh the empty dry vial on the same analytical balance to the nearest
0.1 mg and calculate by difference the amount of material transferred.
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