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Method for determining content of natural rubber in rubber seed oil

A technology for rubber seed oil and natural rubber, applied in the direction of removing certain components, weighing, material inspection, etc., can solve the problems affecting the processing and utilization of rubber seed oil and human harm.

Inactive Publication Date: 2010-02-17
海南省粮油科学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, rubber seed oil contains natural rubber, which is harmful to the human body. This is rarely mentioned in the past literature, and there is no rubber content detection method, which affects the processing and utilization of rubber seed oil, especially as edible oil.

Method used

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  • Method for determining content of natural rubber in rubber seed oil
  • Method for determining content of natural rubber in rubber seed oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Accurately weigh 100 grams of the mixed rubber seed oil sample in a flask, add 400 milliliters of 5% potassium hydroxide ethanol solution, shake well, connect a countercurrent condenser, and boil in a water bath for 1 hour. Take off the condensing tube, filter the saponification solution while hot in another flask with an insulating funnel covered with a piece of 100 mesh filter cloth in advance, wash the saponification flask with 20 milliliters of water, and pour it into the filter. After filtering, the rubber is obtained on the filter cloth. Part of the rubber sticks to the wall of the saponification flask. Wrap the cloth with one end of an iron wire, scrape off all the rubber, wash it with water and put it on the filter cloth. Rinse carefully with water, knead the rubber particles into a ball, and knead and wash repeatedly until there is no alkali and no soap. Finally, knead the rubber into a thin sheet and dry it in a vacuum oven (80°C) to a constant weight, then wei...

Embodiment 2

[0014] Weigh 150 grams of the mixed rubber seed oil sample in a flask, add 600 milliliters of 10% potassium hydroxide ethanol solution, shake well, connect a countercurrent condenser, and boil in a water bath for 1.5 hours. Take off the condensing tube, and filter the saponified solution while it is hot in another flask with an insulating funnel covered with a piece of 100 mesh filter cloth in advance, wash the saponified flask with 30 milliliters of water, and pour it into the filter. After filtering, the rubber is obtained on the filter cloth. Part of the rubber sticks to the wall of the saponification flask. Wrap the cloth with one end of an iron wire, scrape off all the rubber, wash it with water and put it on the filter cloth. Knead the rubber particles into a ball, rinse with water until there is no alkali and no soap, and finally knead the rubber into a thin sheet, dry it in a vacuum oven (80°C) to a constant weight, and weigh it.

Embodiment 3

[0016] Carry out according to the method described in Example 1 basically, but adopt following parameter to reach better measurement result:

[0017] 200 grams of rubber seed oil sample;

[0018] 800 ml of 20% potassium hydroxide ethanol solution;

[0019] Boil for 2 hours on a water bath.

[0020] (2) Statistical evaluation of the detection result of the present invention

[0021] 1. The accuracy of the determination method:

[0022] The recovery rate test was carried out by adding standard natural rubber to peanut oil without natural rubber. The amount of standard rubber added per 100 g of peanut oil was 0.20 g, 0.40 g, and 0.80 g, respectively. Each sample was tested 6 times. The results are shown in Table 1.

[0023] Table 1 measures the data of natural rubber content accuracy

[0024]

[0025] 2. The precision of the determination method:

[0026] Two parts of rubber seed oil were taken to measure the natural rubber content, and the results of 6 measured values ​​...

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Abstract

The invention provides a method for determining the content of natural rubber in rubber seed oil. The determination method has the advantages of simple instrument and equipment, simple, convenient andquick operation, low detection cost and high accuracy and precision. The method for determining the content of the natural rubber in the rubber seed oil by adopting a saponification method is characterized by comprising the following steps: firstly, precisely weighing 100 to 200 grams of rubber seed oil sample and putting the rubber seed oil sample in a flask, adding potassium hydroxide into theflask to form 400 to 800 milliliters of alcohol solution, shaking up the solution and then connecting the solution to a reflux condensing tube, boiling the solution for about 1 to 2 hours in a water bath kettle, taking down the condensing tube, filtering the saponified solution to another flask while the solution is hot, crushing up rubber grains on a piece of filter cloth, washing the rubber grains till no alkali or soap is contained, finally kneading the rubber to form a slice, baking the slice with a vacuum oven (at the temperature of 80 DEG C) to constant weight and then weighing the slice, and calculating the content of the rubber. The rubber seed oil can be saponified in the alkali alcohol solution, the natural rubber belongs to a hydrocarbon substance and does not produce saponification effect, and the natural rubber is coagulated into the rubber grains to be separated out during the saponification of the rubber seed oil so as to determine the content of the natural rubber.

Description

1. Technical field [0001] The invention relates to a method for determining the content of natural rubber, in particular to a method for determining the content of natural rubber in rubber seed oil. 2. Background technology [0002] Rubber seed is the oval seed of the Euphorbiaceae arbor Hevea brasiliensis capsule, the seed kernel contains 40% to 50% oil, and is a tropical woody plant oil. Rubber seed oil is a semi-dry oil, its chemical composition and properties are similar to those of soybean oil, and it contains more than 80% unsaturated fatty acids, including 24.8% oleic acid, 34.5% linoleic acid and 23.3% linolenic acid. new oil sources. At present, basic research on the properties and components of rubber seed oil has been carried out in China. With the increase of rubber seed production, the development of rubber seed oil (especially rubber seed edible oil) has gradually attracted people's attention. However, rubber seed oil contains natural rubber, which is harmfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N33/44
Inventor 郑联合王涛
Owner 海南省粮油科学研究所
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