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

A technology of copper ions and color enhancers, which is applied in the field of physical and chemical analysis of chemical substances, can solve the problems of safe use of traditional Chinese medicinal materials, hidden dangers of Chinese herbal decoction pieces, high processing conditions of toxic reagent tetrachloro amalgam, and high requirements for detection environment, and achieves elimination of background. Color interference, reduced processing complexity, low-cost effects

Inactive Publication Date: 2011-08-17
广东省药品检验所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 f

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Example 1: Using lead acetate test paper to prepare a kit for detecting residual bleaching and coloring agents in Chinese medicinal materials and Chinese medicinal pieces

[0042] This embodiment is a preferred embodiment of using lead acetate test paper to prepare a kit for detecting residual bleaching and coloring agents in Chinese medicinal materials and Chinese medicinal pieces. The kit includes a cecillin bottle containing sodium hydroxide solution, A cecillin bottle with arsenic-free zinc particles, hydrochloric acid solution and lead acetate test paper. Wherein, the mass volume percentage concentration of the sodium hydroxide solution is 0.125%, and its volume is 10 ml. The specification of the cecillin bottle containing the sodium hydroxide solution is 15 ml. The specification of the cecillin bottle with arsenic-free zinc particles is 10ml, and the total mass of arsenic-free zinc particles is 0.2 grams. The lead acetate test paper is a qualitative filter paper wit...

Embodiment 2

[0043] Example 2: Use the kit in Example 1 to perform color reaction of standard products

[0044] In this embodiment, sodium sulfite and sodium bisulfite are used as standard products. Take about 10g each of sodium sulfite and sodium bisulfite standards and put them in a 100ml measuring flask, add purified water or distilled water to dissolve and dilute to the mark, as the respective standard stock solutions.

[0045] Take the above-mentioned stock solutions to prepare the mass volume percentage concentrations of 0.0001%, 0.0002%, 0.0005%, 0.001%, 0.002%, 0.005%, 0.01%, 0.02%, 0.05%, 0.1%, 0.2%, 0.5%, 1% respectively , 2%, 5%, 10% and other standard solutions, and take 2ml respectively for color reaction according to the following steps:

[0046] (1) Sample processing

[0047] The sampling amount of Chinese herbal medicines and Chinese herbal medicine pieces is about 1g. Cut (or grind) the sample into fine particles with scissors (or grinding) and set aside.

[0048] (2) Preparation...

Embodiment 3

[0053] Example 3: Use the kit in Example 1 to perform the color reaction of the sample

[0054] First, prepare the test solution. Place the processed sample in a sescillin bottle containing 10ml of 0.125% sodium hydroxide solution, the size of the bottle is 15ml, tighten the stopper, shake vigorously for 1-2 minutes, let it stand for a while, wait for layering , Take 2ml of the upper solution (filter if necessary) as the test solution. Then proceed to color reaction. Put 2ml of the above test solution in a vial containing arsenic-free zinc granules. Among them, there are 2 arsenic-free zinc granules, about 0.2g, the size of the vial is 10ml, then add 2ml of hydrochloric acid solution, gently Shake to mix evenly, and immediately put the lead acetate test paper on the bottle mouth. The final judgment result. If it turns yellowish-brown to silver-black within 10 minutes, it can be judged that the sample may contain bleaching color enhancing agents such as sulfur dioxide, sulfite...

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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...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 林奇艺林锦锋严全鸿谢志洁
Owner 广东省药品检验所
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