Test kits for determining the chemical stability of a compost sa

Details Test kits for determining the chemical stability of a compost sa Test kits for determining the chemical stability of a compost sa

1993-05-07

1994-06-14

Johnston, Jill A.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Sample mechanical transport means in or for automated...

422 55, 422 66, 422 681, 422 69, 422 83, 422 85, 422 86, 436 29, 436 32, 436 33, G01N 3012

Patent

active

053208072

ABSTRACT:
A test kit for determining the `total compost life`, and chemical stability of a moist compost sample, includes a transparent container for holding the compost sample, and a reactant mass, located within the container in the space not occupied by the compost sample. The reactant mass includes a pH basic reactant material, and a color change indicator material, responsive to pH changes in the atmosphere within the container. After the moist compost sample is charged into the container, the container is sealed and allowed to remain undisturbed for a prescribed time period, e.g., about three (3) hours. During this time, carbon dioxide (CO.sub.2) and volatile organic acids are emitted from the sample into the space surrounding the chemically reactant mass. The pH basic reactant chemically reacts with the emitted carbon dioxide (CO.sub.2), in ionic form, or the emitted volatile organic acids, so as to produce a color change. The nature of the color change is an indication of the carbon dioxide (CO.sub.2) content, or the volatile organic acids content in the compost sample.

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