ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
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.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760270813
