Accession Number : ADA192034


Title :   Determination of the Impregnant Concentrations on ASC Type Charcoal. A Magnetic Susceptibility Study


Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)


Personal Author(s) : Liang, Septimus H ; Harrison, Brian H ; Pagotto, Jack G


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a192034.pdf


Report Date : Oct 1987


Pagination or Media Count : 54


Abstract : A non-destructive test has been developed to monitor the impregnants in charcoal. A study of some commercially-produced and custom-made ASC- whetlerties indicates significant increases in the measured magnetic susceptibility from that of the base charcoal. Correlations between the measured susceptibilities and the concentrations of copper and chromium by a linear mathematical model are established with reasonably good fit for the custom-made charcoals. It is concluded that the magnetic susceptibility data would be best utilized as a qualittative tool for the assessment of metal impregnants on charcoal, rather than for precise quantitative analyses. Some preliminary data on the magnetic susceptibilities of ASC-whetlerites co-impregnated with TEDA are also presented. Magnetic susceptibilities measured on the same charcoal samples by commercial instruments indicate that although they show similar trends as the Gouy balance, these instruments are subject to too much variation to be of any qualitative and/or quantitative use for ASC charcoals.


Descriptors :   *NONDESTRUCTIVE TESTING , *QUALITATIVE ANALYSIS , *CHARCOAL , MATHEMATICAL MODELS , METALS , CANADA , COPPER , PRECISION , CONCENTRATION(COMPOSITION) , IMPREGNATION , GAS FILTERS , PERMEABILITY(MAGNETIC) , CHROMIUM , SAMPLING , LINEARITY , ACTIVATED CARBON , MAGNETIC PROPERTIES , QUANTITATIVE ANALYSIS


Subject Categories : Physical Chemistry
      Miscellaneous Materials
      Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE