Test swab cartridge type device and method for detecting lead and cadmium
AssigneeHybriVet Systems, Inc.
InventorMarcia J. Stone
Life of this patent
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Abstract
A swab is impregnated with a test reagent such that a test for a specific substance can be effected by rubbing the impregnated swab over the surface to be tested and then viewing the swab for a reagent reaction. A method for testing for a metal includes impregnating a swab with a reagent, such as, for example, a rhodizonate dye reagent when testing for lead, and rubbing the swab over a surface suspected of containing the metal. If a metal is present in the surface, a reaction with the metal produces an easily detectable color on the swab tip.
Claims20
A method of testing for a substance on a surface with a reagent that reacts with the substance where the substance is lead or cadmium, comprising the steps of:
- providing a swab stick having a stem and an absorbent ball of material at one end of the stem, wherein the absorbent ball of material is impregnated with the reagent;
- contacting the impregnated absorbent ball of material with the surface;
- and
- detecting the presence of the substance by inspecting the impregnated ball of material for a reaction between the substance and the reagent.
A device for testing for a substance on a surface wherein the substance is lead or cadmium comprising:
- a cartridge;
- two compartments within said cartridge wherein one compartment contains a reagent that reacts with the substance and the other compartment contains an activating solution;
- and
- an absorbent ball of material mounted at one end of the cartridge,
- wherein the reagent and activating solution are combined and mixed within the cartridge before the device is used.
A method for testing for cadmium on a surface comprising:
- soaking a filter paper with an activator solution,
- wetting the filter paper with water,
- placing the filter paper on a surface,
- placing drops of 4-nitronaphthalene-diazoamino-azo-benzene or 1-(4-nitrophenyl)-3-(4-phenylazophenyl)triazene on the filter paper, and
- detecting the presence of cadmium by inspecting the filter paper for a pink color.
Dependencies are inferred from the claim text.