Chemistry: analytical and immunological testing – Nitrogen containing
Patent
1992-09-03
1994-03-22
Warden, Robert J.
Chemistry: analytical and immunological testing
Nitrogen containing
422 61, 436110, 436111, 436124, G01N 3322
Patent
active
052963802
ABSTRACT:
In a color reaction method for detecting particular classes of explosives, a sample from a suspect source is subjected serially to the indicated reagents in the liquid phase, the reagents after the first being applied only if no color reaction has been obtained in the preceding test. The second and third reagents only are applied in presence of the preceding reagent(s). The first reagent is an alkaline solution of a diazotizable aminoaromatic azo-dye precursor, which detects nitroaromatic explosives. The second reagent is a strongly acidic reagent containing a nitrate to nitrite ion reducing agent and a diazo-coupler, which detects organic nitrates and nitramines. The third reagent is zinc powder suspended in a liquid, which detects inorganic nitrates. The fourth reagent is an aniline salt in a homogeneous strongly acidic solution including a water-miscible organic solvent, which detects chlorates and bromates. The invention includes also a test kit for use in the method.
REFERENCES:
patent: 3415717 (1968-12-01), Avakian
patent: 3552926 (1971-01-01), Fauth et al.
patent: 3817705 (1974-06-01), Stein et al.
patent: 4788039 (1988-11-01), Glattstein
patent: 5157261 (1992-10-01), Grey et al.
Chemistry and Technology of Explosives, vol. 4, Tadeusz Urbanski, pp. 622-625 (1984).
Collins Laura E.
Israel Institute for Biological Research
Warden Robert J.
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