Rapid detection kit and detection method of forbidden azo dyes in dyed textiles

Abstract

The invention discloses a rapid detection method of forbidden azo dyes in dyed textiles, which uses the following reagents: 1) an extracting reagent A: 10 mL of methyl ten-butyl ether; 2) an extracting reagent B: 5 mL of 0.1-1.0 mol / L hydrochloric acid solution; 3) a reagent 1: 0.05 mL of 50 g / L NaNO2 solution; 4) a reagent 2: 0.5 mL of 25 g / L NH4SO3NH2 solution; 5) a reagent 3: 1 mL of o-metoxyphenol ethanol aqueous solution with volume percentage concentration of 2%; 6) a reagent 4: 1 mL of 0.5 mol / L NaOH solution; 7) a reducing agent 1: 16 mL of 0.06 mol / L citrate buffering solution with pH of 6.0; and 8) a reducing agent 2: 3.0 mL of 200 mg / L sodium hydrosulfite solution. According to the invention, the pre-treatment is realized by liquid-liquid extraction of textile reduction solution and discoloring, and the aromatic amine is measured by coloration; the pre-treatment is simple and rapid enough to greatly simplify the original steps, and no instrument or equipment is necessary in the measurement so as to realize the quick screening detection of forbidden azo dyes in textiles.

Description

technical field [0001] The invention relates to a rapid screening and detection method for prohibited azo dyes in dyed textiles, belonging to the technical field of analytical chemistry. Background technique [0002] Prohibition of azo dyes is one of the items that must be inspected for import and export of textiles. As early as 1994, the German government took the lead in promulgating the "Food and Consumer Goods Act" (Second Amendment), prohibiting the production and import of textiles dyed with azo dyes that can produce carcinogenic aromatic amines. On September 11, 2002, the Official Journal of the European Community officially issued Directive 2002 / 61 / EC, which stipulates that azo dyes with a concentration exceeding 30 mg / kg that can release prohibited aromatic amines should not be used for long-term contact with human skin or oral cavity. Textile or leather products in direct contact, such as clothing, bedding, towels, wigs, hats, etc. my country's national mandatory...

AI Technical Summary

Problems solved by technology

Although this type of method is accurate and reliable, the pretreatment is complicated, precision equipment is required, the inspection cycle is long, the inspection cost is high, and professional technicians are required, and the conditions are harsh.

Images