Application of lead or copper ion test paper in detection of bleaching toner residue

Abstract

The invention provides application of lead or copper ion test paper in detection of bleaching toner residue. The lead or copper ion test paper is selected from qualitative filter paper with diameter of 1.5 to 2.5 centimeters, and comprises lead acetate test paper, copper acetate test paper or copper sulfate test paper. The bleaching toner capable of being detected by using the lead or copper ion test paper comprises one or more of sulfur dioxide, sulfite, bisulfite, low sulfite, pyrosulfite and sodium formaldehyde sulfoxylate. The lead or copper ion test paper can also be used for preparing a kit for detecting the bleaching toner residue. The invention also provides a specific method of applying the lead or copper ion test paper in the detection of the bleaching toner residue. The kit has the advantages of simple operation, quick detection, low cost, semi-quantitative measurement and high accuracy, other detection instruments for auxiliary detection are not needed, and detection environments and conditions are not limited. Uniform color is formed in 5 to 10 minutes, and semi-quantitative detection can be performed.

Description

Technical field [0001] The invention relates to the physical and chemical analysis of chemical substances, in particular to the application of lead or copper ion test paper in the detection of bleaching color enhancer residues. Background technique [0002] Scientific research has shown that long-term or high-dose intake of sulfite can cause gastrointestinal and liver harm, and sulfur dioxide can damage the reproductive system of male mice. Since the 1980s, the research on the safety of sulfite has attracted more and more attention and attention from various countries. [0003] The traditional processing methods of sulfur fumigation or soaking of Chinese medicinal materials will cause a large amount of sulfur dioxide, arsenic, mercury and other toxic and harmful substances to remain in the original Chinese medicinal materials. Therefore, the "Pharmacopoeia of the People's Republic of China" (2000 edition) stipulates that, except for yam, all other traditional Chinese medicinal mat...

AI Technical Summary

Problems solved by technology

Similarly, it also brings great hidden dangers to the safe use of Chinese herbal medicines and Chinese herbal medicines

At present, the legal method to detect whether there is sulfur dioxide residue in Chinese herbal medicines and herbal pieces is the distillation titration method. This method uses a glass instrument device, which is large in size, has many connecting parts, and uses nitrogen gas. The operation time is too long and must be carried out in the laboratory. and some studies try to learn from the rose paraaniline colorimetric method or ion chromatography detection of sulfur dioxide in food, but either use the toxic reagent tetrachloro amalgam and the processing conditions are relatively high, or the equipment used is expensive and has a large volume , The detection environment has high requirements and the processing conditions are strict, so it is not convenient to carry out on-site supervision and use

At present, there is no research on simple and rapid detection methods using chemical methods, especially no research on the use of filter paper as a carrier for separation, diffusion, and chemical reaction color development while semi-quantitative detection of chemical components

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