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[Hygroscopic items readily absorb moisture from the air.] However, they still decomposed at an unreliably fast rate, causing so many accidental explosions in storage and among gun crews that black and brown powders remained the favored gun propellants on land and sea through the end of the 19th century. [Chromatography is a range of physical methods used to separate and analyze mixtures.] In addition to the goal of maintaining master samples for all nitrocellulose-based propellants in the Army stockpile, each year the Joint Munitions Command (JMC) orders hundreds of propellant samples from a variety of storing locations to be prepared and shipped to the Army Propellant Surveillance Laboratory (APSL) at Picatinny Arsenal.
Field-Portable Propellant Stability Test Equipment by eLena M. GraveS The safety of ammunition stocks has been improved with the development of field-portable propellant stability testing equipment, which allows more ammunition samples to be tested. T he U.S. military has stock
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