Method for determining oil content of vegetable oil material based on ultrasonic assistant extraction

An ultrasonic wave and oil content technology, which is applied in the field of determination of oil content of vegetable oils, can solve the problems of limited popularization and application, high risk of experimentation, high price, etc., and achieve the effect of broad application prospects, simple instrument requirements, and easy operation

Inactive Publication Date: 2010-09-29
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When measuring the oil content of plants with the fat analyzer method, the extraction temperature, boiling extraction time, rinsing time, extraction solvent and sample particle size all have a great influence on the measurement results, and a certain amount of water and electricity is required. Larger; Abbe refractometer method, nuclear magnetic resonance method, and near-infrared absorption spectroscopy are indirect measurement methods, and the measurement results are all based on the Soxhlet extraction method, and the prices of nuclear magnetic resonance and near-infrared spectrometers are relatively expensive. limited its application

Method used

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  • Method for determining oil content of vegetable oil material based on ultrasonic assistant extraction
  • Method for determining oil content of vegetable oil material based on ultrasonic assistant extraction
  • Method for determining oil content of vegetable oil material based on ultrasonic assistant extraction

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: Determination of oil content of yellow mustard

[0035] (1) Yellow mustard seeds were collected from Yulin, Shaanxi, air-dried naturally, removed impurities, and evenly sampled.

[0036] (2) Yellow mustard seed sample preparation: weigh 5.0g-10.0g sample (m 1 ), the sample is accurate to 0.001g, put it in an oven at 105°C and dry for 30 minutes, pour it into a mortar while it is hot, add about 4g of degreased fine sand, and grind together, grind the sample and fine sand until oily, Transfer without damage to a corked Erlenmeyer flask.

[0037] (3) Ultrasonic assisted leaching: Add petroleum ether according to the sample-to-petroleum ether solid-liquid ratio (sample weight to petroleum ether volume ratio) of 1:12 (w / v). Place the triangular flask in an ultrasonic instrument, set the ultrasonic frequency to 45KHz, and the ultrasonic power to 90W, extract for 15 minutes, and collect the extract by suction filtration; repeat the extraction 4 times in this wa...

Embodiment 2

[0045] Embodiment 2: Camellia oleifera seed oil content determination

[0046] (1) Camellia oleifera seeds are collected from Youxi, Fujian, air-dried naturally, removed impurities, shelled, and evenly harvested camellia oleifera seeds.

[0047] (2) Preparation of Camellia oleifera seed samples: Weigh 5.0g-10.0g samples (m 1 ), sample (m 1 ) to an accuracy of 0.001g, put it in an oven at 105°C for 30 minutes, pour it into a mortar while it is still hot, add about 4g of degreased fine sand, and grind together. In a corked Erlenmeyer flask.

[0048] (3) Ultrasonic assisted leaching: add petroleum ether according to the sample to petroleum ether solid-liquid ratio (weight to volume ratio) of 1:13 (w / v). Put the stoppered Erlenmeyer flask in an ultrasonic cleaner, set the ultrasonic frequency to 45KHz and the ultrasonic power to 90W to extract for 12 minutes, and collect the extract by centrifugation; repeat the extraction for 5 times, and combine the extract .

[0049] (4) T...

Embodiment 3

[0057] Embodiment 3: determination of walnut kernel oil content

[0058] (1) Walnuts are collected from Huanglong, Shaanxi, air-dried naturally, removed impurities, shelled, and evenly harvested walnut kernels.

[0059] (2) Walnut kernel sample preparation: Slice the walnut kernel and weigh 5.0g-10.0g sample (m 1 ), sample (m 1 ) to an accuracy of 0.001g, put it in an oven at 105°C for 30 minutes, pour it into a mortar while it is still hot, add about 4g of degreased fine sand, and grind together. In a corked Erlenmeyer flask.

[0060] (3) Ultrasonic-assisted leaching: Add petroleum ether according to the sample-to-petroleum ether solid-liquid ratio (weight to volume ratio) of 1:14 (w / v). Place the corked triangular flask in an ultrasonic cleaner, set the ultrasonic frequency to 45KHz, and the ultrasonic power to 100W for 10 minutes of leaching, and collect the leaching solution by suction; repeat the extraction 6 times in this way, and combine the leaching liquid.

[006...

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Abstract

The invention discloses a method for determining oil content of vegetable oil material. The method utilizes an ultrasonic wave as an assistant tool, and comprises the steps of sampling, sample preparation, solvent ultrasonic assistant extraction, solvent recovery, extract drying, oil content calculation and the like. The method can completely and quickly extract and determine crude fat in the vegetable oil material, and can greatly speed up the process of extracting the crude fat in the oil material so as to shorten the determination time of the vegetable oil material. Compared with the conventional Soxhlet extraction method, the method has the advantages of simple operation, short consumed time, accurate determination result, good repeatability and the like, and is a novel method for quickly determining the oil content of the vegetable oil material.

Description

technical field [0001] The invention belongs to the field of chemical analysis and detection, in particular to a method for measuring the oil content of vegetable oil. Background technique [0002] The oil content of vegetable oil is an important chemical component and one of the important indicators used to evaluate the quality and nutritional value of oil. For oil, the oil content directly shows the economic value of the oil; at the same time, the oil content is also determined An important basis for oil grades. [0003] At present, the national standard test method for the determination of the oil content of vegetable oils in my country is the Soxhlet extraction method, including GB / T5512-2008, GB / T6433-2006, GB / T14488.1-2008, etc. The Soxhlet extraction method uses ether or petroleum ether as a solvent, uses a Soxhlet extraction device to extract the ether or petroleum ether soluble matter in vegetable oil, removes the solvent, and weighs the quality of the extract to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02G01N1/28
Inventor 于修烛杜双奎李志西宋丽娟李志成
Owner NORTHWEST A & F UNIV
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