| abstract |
PCT No. PCT/US90/00527 Sec. 371 Date May 7, 1990 Sec. 102(e) Date May 7, 1990 PCT Filed Feb. 2, 1990.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. |