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Ionic impurities in water contained in plastic and pyrex bottles
Author(s) -
Crine JeanPierre
Publication year - 1987
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760270813
Subject(s) - polyethylene , polypropylene , materials science , impurity , ionic bonding , ion , ionic conductivity , fluoride , composite material , inorganic chemistry , chemistry , organic chemistry , electrode , electrolyte
It is shown that most of the impurities in plastic bottles are not extracted by the water contained In these bottles. However, in the presence of water ions can easily be generated at 22 and 75°C in polyethylene, polypropylene, Teflon‐FEP, and Pyrex bottles. Surprisingly, relatively large amounts of fluoride ions are extracted from Teflon‐FEP bottles which contain very few contaminants. These ions greatly affect the electrical conductivity of the water which is linearly related to the ionic content. The plastic bottles containing the lowest ionic contents are those made in polypropylene and polyethylene. Sodium ions are also measured in the water contained in Pyrex bottles. It is also shown that acid rinsing of plastic containers is not a recommended cleaning technique.