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pyknometer

Pycnometer (GB)
picnómetro (ES)
pycnomètre (F)
picnometro (I)
dichtheid (N)
densidade (PO)

Measuring instrument (Greek Pykno = tightly packed) for the determination of Relative density of solids or liquids by weighing. The first such device is attributed to the Arabic polymath Abu Raihan Muhammad al-Biruni (973-1048). It consists of a glass bulb with a thinly pierced glass stopper and must be calibrated to a certain volume. If you fill it in succession with the liquid to be examined and with water and weigh both, the density can be determined. Using pycnometer can, among other things Mostgewicht and alcohol content be determined. See also below refractometer as well as regarding other methods or measuring instruments under analytical test,

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