Qualitative analysis method for latex doped substances

A qualitative analysis and latex technology, applied in the field of qualitative analysis of latex doping substances, can solve the problems affecting the fair trade of natural rubber latex and rubber product quality, increase the proportion of latex, etc., and achieve easy popularization, accurate qualitative and simple operation Effect

Active Publication Date: 2015-06-17
ANALYSIS & TESTING CENT CHINESE ACADEMY OF TROPICAL AGRI SCI
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Problems solved by technology

During the development of the natural rubber industry, the harvesting, trading and processing of latex are the key links in the development of the natural rubber industry. For a long time, due to the drive of interests, lawbreakers often dope natural latex with starch, double ash powder, and lime. powder, urea, sucrose and other non-glue substances to increase the proportion of latex and make illegal profits, seriously affecting the fair trade of natural rubber latex and the quality of rubber products

Method used

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  • Qualitative analysis method for latex doped substances
  • Qualitative analysis method for latex doped substances
  • Qualitative analysis method for latex doped substances

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Embodiment Construction

[0024] principle:

[0025] Add a certain amount of ammonia to the quantitatively weighed latex sample, put the sample into a thermal radiation pneumatic latex rapid dryer or other baking box, under the action of high temperature, a large amount of ammonia and water vapor evaporate, and the rubber molecules A polymerization reaction also occurs, forming a large number of upwardly displaced bubbles. After the latex sample is dried, a multi-layered thin film is formed.

[0026] Qualitative analysis of doped particulate matter. Because the doped particulate matter (such as starch, double ash powder, lime powder, etc.) cannot undergo the above reaction, it is concentrated on the bottom of the beaker. After drying, the adhesive film appears on the upper layer, while the doped particulate matter precipitates in large chunks on the bottom of the cup. The layering phenomenon is obvious, which can be intuitively qualitative.

[0027] Qualitative for doped soluble substances. Because the dop...

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Abstract

The invention discloses a qualitative analysis method for latex doped substances. The qualitative analysis method comprises the following steps of: (1) manufacturing a characteristic pattern; (2) qualitatively judging doped substances of a latex doped sample to be detected. The qualitative analysis method disclosed by the invention can determine various substances doped in latex in an intuitive and qualitative; with the adoption of the method, the accurate determination of the content of dry glue is not influenced; the method can perform determination accurately and rapidly, is very easy to operate and is convenient to popularize.

Description

Technical field [0001] The invention relates to a qualitative analysis method for latex doped substances. Background technique [0002] Natural rubber is a typical tropical economic crop, and its dry rubber products play a pivotal role in the national economy and social development. According to incomplete statistics, my country’s Hainan Province, Yunnan Province, Guangdong Province, Guangxi Province, Sichuan Province, Fujian Province and many other provinces have cultivated them. The total planting area exceeds 20 million mu, which has become a pillar industry for national economic growth in many places. In the development process of the natural rubber industry, the collection, trade and processing of latex are the key links in the development of the natural rubber industry. For a long time, due to profit-driven, criminals often dope starch, double ash powder, and lime into natural rubber latex. Powder, urea, sucrose and other non-gum substances, which increase the proportion o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/44G01N1/28G01N1/44
Inventor 周聪赵敏罗金辉徐志叶海辉高丽华
Owner ANALYSIS & TESTING CENT CHINESE ACADEMY OF TROPICAL AGRI SCI
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