Apparatus for measuring the non-porous surface area of carbon bl

Details Apparatus for measuring the non-porous surface area of carbon bl Apparatus for measuring the non-porous surface area of carbon bl

1990-06-07

1991-12-24

Lacey, David L.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

422 62, 422 73, 422 81, 73 61R, 73 611R, 2101982, G01N 1508

Patent

active

050750801

ABSTRACT:
An automated method for measuring the non-porous surface area of carbon black is disclosed. The method comprises passing a small sample of a CTAB-carbon black dispersion through a disposable filter to separate the carbon black with adsorbed CTAB from the filtrate containing unadsorbed CTAB. The filtrate next passes through a measuring loop and a high pressure liquid chromatography column to separate the CTAB from the other filtrate components. The CTAB is next sensed by a detector and an integrator calculates the amount of CTAB adsorbed by the carbon black and the non-porous surface area of the carbon black. The integrated apparatus for carrying out this method is also described. Once the carbon black and the CTAB are mixed, there is no further handling of the sample. The system is entirely automated and takes only a few minutes for the CTAB area determination. Measuring temperatures can also be fixed. This results in much more reproducible CTAB numbers for a particular carbon black.

REFERENCES:
patent: 4629566 (1986-12-01), Prud'homme et al.
Bagchi, R. et al., "Contamination Sources in the Cleanup of Samples for Inorganic ion Analysis", J. Chromatography, 351 (1986), 541-547.
James, L. B., "Amino Acid Analysis: a Fall-Off in Performance", J. Chromatography, 408 (1987), 291-295.

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