Checking the sensitivity and accuracy of humidity indicators
Discusses the problems of protecting the goods during transport from exposure to high humidity and ways of its solutions; the presence of some consumers ‘ requirements for adherence to the maximum values of humidity and confirmation of its actual value in the packed products; the use of paper humidi...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Belarusian National Technical University
2020-04-01
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| Series: | Литьë и металлургия |
| Subjects: | |
| Online Access: | https://lim.bntu.by/jour/article/view/3177 |
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| Summary: | Discusses the problems of protecting the goods during transport from exposure to high humidity and ways of its solutions; the presence of some consumers ‘ requirements for adherence to the maximum values of humidity and confirmation of its actual value in the packed products; the use of paper humidity indicators to control the environment during transit; the principle of operation of the indicator based on the change in color of cobalt salts depending on the composition of the crystalline.There is a lack of methodology for quality control of paper humidity indicators. The method developed by the laboratory of OJSC «BSW» – Management Company of the Holding «BMC», to determine their sensitivity and accuracy is given. The essence of the test is to assemble an installation that provides a certain value of air humidity. To do this, we use solutions of sulfuric acid of the appropriate concentrations. Air is passed first through water, then through solutions and fed into a flask with an indicator. Depending on the humidity of the supplied air, the corresponding indicator points change colour. Sensitivity and accuracy are evaluated on a colour scale. |
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| ISSN: | 1683-6065 2414-0406 |