The paper discusses the principle, type and the application of the colour forming reaction to the emergency investigation testing of the chemical accident and some matters needing attention.

Study and application of fading reaction of Congo red with CTMAB

The result show that in the presence of surface active agent SDS and in the H2SO4 medium,the fading reaction has high sensitivity,and the molar absorptivities was 4.

The fading reaction of CPA-mA with Cr 2O 2- 7 was studied.

Synthesis of 8-(8-quinolylazo)-5-aminoquinoline and its color reaction with cobalt(Ⅱ);

Synthesis of a new reagent 1-(4-Nitrophenyl)-3-(5-Methypyridyl)-Triazene and its color reaction with cadmium;

Synthesis of the new reagent 1-azobenzene-3-(3-nitro-5-chloro-2-pyridyl) triazene and its color reaction with zinc;

Study on the colour reaction of a new reagent 1-(4-nitrophenyl)-3-(6-methbenz-thiazol)-thiazene with cadmium(Ⅱ);

Synthesis of 8-aminoquinoline-5-azo derivatives and their colour reaction with cobalt;

Study on the Colour Reaction of Fe(Ⅲ) with a new Colour Reagent 8 Quinine Azo Quercetin;

In this paper the synthesis of the new reagent 1-(4-nitrophenyl)-3-(3-nitro-5-chloro-pyridyl)-triazene(NPNCPDT) and its chromatogenic reaction with zinc have been studied.

1-(4-methyl-6-hydroxyl-pyrimidine)-3-(phenyl-azo)-triazene(MHPPAT),as a chromogenic reagent,was synthesized and its chromatogenic reaction with copper was studied.

Fluorimetric Determination of Estazolam by Color Reaction of Sulfuric Acid;

A new scattering method for determination of diphenhydramin hydrochoride is discussed by the color reaction of sulfuric acid.

The experiment aimed to analyze the main components of flavonoids from corn silk by using color reaction,thin-layer chromatography(TLC) and ultraviolet(UV) spectral scanning.