|
|||||
|
|
Validation of the UN test method N.5 |
|
| Institution: | 1. Department of Geography and Geology, University of North Carolina Wilmington, Wilmington, NC 28403-5944, USA;2. Department of Geology, Cornell College, Mount Vernon, IA 52314, USA;3. Paleontological Research Institution, 1259 Trumansburg Road, Ithaca, NY 14850, USA;4. Department of Geosciences, Georgia State University, PO Box 4105, Atlanta, GA 30302, USA;5. Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14853, USA |
| Abstract: | Many substances react with water in such a way that flammable gases are formed. For transport issues this reaction may possess a considerable hazard especially if the cargo is wetted by rain or by water from other sources. In the UN Recommendations on the Transport of Dangerous Goods these kinds of problems are addressed. The UN test N.5 “Test method for substances which in contact with water emit flammable gases” corresponds to this hazard. Classification according to the test method is done by measurement of the gas evolution rate of the flammable gas by any suitable procedure. At BAM a gravimetric approach is used to measure the gas evolution rate. In this paper we present the evaluation of the apparatus by means of an absolute calibration routine utilizing a reaction where a known amount of gas is produced as well as the evaluation of important parameters influencing the gas evolution rate using different substances. It can be shown that the apparatus is capable of measuring absolute gas volumes as low as 6 mL with an acceptable error of about 17% as determined from the reaction of Mg with demineralized water. |
| Keywords: | UN test N 5 Water reactive substance Flammable gas Magnesium Aluminum Hydrogen UN-TDG"} {"#name":"keyword" "$":{"id":"kwrd0045"} "$$":[{"#name":"text" "_":"UN Manual of Tests and Criteria UN-GHS"} {"#name":"keyword" "$":{"id":"kwrd0055"} "$$":[{"#name":"text" "_":"Globally Harmonized System for Classification and Labeling of Chemicals GER"} {"#name":"keyword" "$":{"id":"kwrd0065"} "$$":[{"#name":"text" "_":"gas evolution rate Mg"} {"#name":"keyword" "$":{"id":"kwrd0075"} "$$":[{"#name":"text" "_":"magnesium powder Al"} {"#name":"keyword" "$":{"id":"kwrd0085"} "$$":[{"#name":"text" "_":"aluminum powder |
| 本文献已被 ScienceDirect 等数据库收录！ | |