阅读说明：本技术 一种亚麻籽油品质检测的方法 (Method for detecting quality of linseed oil ) 是由 李春生 于 2019-11-26 设计创作，主要内容包括：本发明提供了一种亚麻籽油品质检测的方法,涉及油类检测技术领域,解决现有亚麻籽油的油品检测成本高、费时费力的技术问题,由下列步骤组成：亚麻籽油汽化：通过搅拌器搅动液态的亚麻籽油并向其内以稳定的速度充入温度一定的氮气吹扫,并将得到的氮气和亚麻籽油的混合气体送入浓缩罐内进行浓缩；步骤二、浓缩；向浓缩罐内加压增加其内的亚麻籽油的密度,以便后续检测室内的气敏传感器能够有效接触亚麻籽油,确保检测结果的准确性；步骤三、检测；将浓缩后的亚麻籽油和氮气的混合气体排至检测室内采用气敏传感器进行检测；步骤四、数据的处理：分别将五个检测室内的第一检测组、第二检测组和第三检测组的气敏传感器测得的数据进行处理。(The invention provides a method for detecting the quality of linseed oil, relates to the technical field of oil detection, solves the technical problems of high oil product detection cost, time and labor waste of the conventional linseed oil, and comprises the following steps: linseed oil vaporization: stirring liquid linseed oil by a stirrer, filling nitrogen with a certain temperature at a stable speed for purging, and feeding the obtained mixed gas of the nitrogen and the linseed oil into a concentration tank for concentration; step two, concentration; the concentration tank is pressurized to increase the density of the linseed oil in the concentration tank, so that a gas sensor in a subsequent detection chamber can effectively contact the linseed oil, and the accuracy of a detection result is ensured; step three, detection; discharging the concentrated mixed gas of linseed oil and nitrogen into a detection chamber, and detecting by using a gas sensor; step four, processing data: and respectively processing the data measured by the gas sensors of the first detection group, the second detection group and the third detection group in the five detection chambers.)

1. A method for detecting the quality of linseed oil is characterized by comprising the following steps:

step one, vaporizing linseed oil: placing linseed oil into a closed container provided with a stirrer, starting the stirrer, introducing nitrogen with stable flow rate and constant temperature into the closed container containing the linseed oil, and discharging the nitrogen obtained after purging the linseed oil into a concentration tank;

step two, concentration: keeping the temperature in the concentration tank consistent with the temperature of the nitrogen filled in the closed space filled with the linseed oil, pressurizing the concentration tank by a booster pump until the concentration of the gaseous linseed oil in the concentration tank reaches, and discharging the gas in the concentration tank into a detection device;

step three, detection: the detection device comprises 5 detection chambers which are sequentially arranged from left to right, an inlet is formed in the top of each detection chamber, each detection chamber is cylindrical, a first detection group, a second detection group and a third detection group are sequentially arranged in each detection chamber from top to bottom, each first detection group, each second detection group and each third detection group respectively comprise five gas sensors A, B, C, D and E with different types, and the five gas sensors are equidistantly distributed along the circumference of each detection chamber;

step four, processing data: comparing the measured value with the template data after the data processing to judge whether the quality of the linseed oil meets the standard or not; the data processing method comprises the following steps:

2. The method of claim 1, wherein the first step comprises a stirrer rotating at 30 rpm.

3. The method of claim 1, wherein the flow rate of nitrogen in the first step is 0.5-1 m/s.

4. The method of claim 3, wherein the flow rate of the nitrogen is 0.7 m/s.

5. The method of claim 1, wherein the temperature of the nitrogen in the first step is 30-60 ℃.

6. The method of claim 5, wherein the temperature of the nitrogen is 45 ℃.

7. The method of claim 1, wherein k is the same as k in step four ₁、k ₂、k ₃、k ₄And k ₅The values of (A) are 0.15, 0.2, 0.15, 0.2 and 0.3 respectively.

Technical Field

The invention relates to the technical field of oil detection, in particular to a method for detecting the quality of linseed oil.

Background

Flax (the scientific name: Linum usittissimum L) is an annual herbaceous plant and can be divided into three types of fiber flax, oil flax and oil fiber flax, wherein flax (flaxseed, seed) is also called flax seed and is a mature seed of flax, and in China, the flax seeds are mainly produced in China and are respectively Gansu Qingyang, Huixing, Shanxi Qinling, Hebei Shanbei, the area above the dam, inner Mongolia area, Shanxi, Ningxia, Qinghai, Xinjiang, Heilongjiang and Yunnan, the flax seeds are mainly used as oil for producing and processing edible vegetable oil, the main components of the flax seeds are fat, protein and dietary fiber, other components also comprise mineral substances, α -linolenic acid, lignan, flaxseed gum, vitamins and the like, scientific research shows that the flax seeds contain cyanogen glycosides, substances such as VB6 factors, phytic acid and the like or anti-nutritional factors, and the flax seed oil contains a large amount of unsaturated fatty acids, so that atherosclerosis and high toxicity are prevented.

The linseed oil has rich types and contents of fragrant substances, obvious fragrance characteristics, and obviously different types of flax and seed oil fragrance qualities of different preparation processes. According to the national standard, the linseed oil is divided into linseed crude oil, pressed finished linseed oil and leached finished linseed oil. The pressed linseed oil product can be divided into primary and secondary. The leached finished linseed oil can be divided into first-level, second-level, third-level and fourth-level. At present, a lot of families begin to eat linseed oil, but the market of linseed oil is various and disordered. The quality of linseed oil is very important when people buy it. However, the quality classification evaluation of linseed oil still mainly relies on sensory evaluation, and the identification result is influenced by various factors including age, experience, identification environment and the like of an identifier. Even if the discriminator is experienced, the discriminator can be influenced by various accidental factors, and the discrimination capability of the ordinary person is more difficult to predict; in addition, if the linseed oil needs to be classified on a large scale, the method for artificial sensory identification is low in efficiency, and the reliability of the identification result cannot be guaranteed.

Disclosure of Invention

The invention aims to provide a method for detecting the quality of flaxseed oil, which solves the technical problems of high cost, time and labor waste of flaxseed oil product detection in the current market.

In order to solve the technical problems, the invention adopts the following technical scheme: the production process of the linseed oil quality detection method comprises the following steps of:

the invention provides a method for detecting the quality of linseed oil, which comprises the following steps:

step one, vaporizing linseed oil: placing linseed oil into a closed container provided with a stirrer, starting the stirrer, introducing nitrogen with stable flow rate and constant temperature into the closed container containing the linseed oil, and discharging the nitrogen obtained after purging the linseed oil into a concentration tank;

step two, concentration: keeping the temperature in the concentration tank consistent with the temperature of the nitrogen filled in the closed space filled with the linseed oil, pressurizing the concentration tank by a booster pump until the concentration of the gaseous linseed oil in the concentration tank reaches, and discharging the gas in the concentration tank into a detection device;

step three, detection: the detection device comprises 5 detection chambers which are sequentially arranged from left to right, an inlet is formed in the top of each detection chamber, each detection chamber is cylindrical, a first detection group, a second detection group and a third detection group are sequentially arranged in each detection chamber from top to bottom, each first detection group, each second detection group and each third detection group respectively comprise five gas sensors A, B, C, D and E with different types, and the five gas sensors are equidistantly distributed along the circumference of each detection chamber;

step four, processing data: comparing the measured value with the template data after the data processing to judge whether the quality of the linseed oil meets the standard or not; the data processing method comprises the following steps:

(k ₁+k ₂+k ₃+k ₄+k ₅＝1；j＝1,2,3,4,5)

the value measured by the sensor A of the ith detection group in a certain detection chamber;

the value measured by the sensor B of the ith detection group in a certain detection chamber;

the value measured by the sensor C of the ith detection group in a certain detection chamber;

the value measured by the sensor D of the ith detection group in a certain detection chamber; the value measured by the sensor E of the ith detection group in a certain detection chamber;

the measured value of the sensor A in the jth detection chamber;

the measured value of the sensor B in the jth detection chamber;

the measured value of the sensor C in the jth detection chamber;

the measured value of a sensor D in the jth detection chamber;

the measured value of a sensor E in the jth detection chamber; x is the number of _iCalculating the value obtained in the ith detection chamber according to the value measured by the gas sensor; k is a radical of ₁、k ₂、k ₃、k ₄And k ₅Sensors A, B, C, D and E at x, respectively _iThe weight occupied.

Preferably, the rotating speed of the stirrer in the first step is 30 rpm.

Preferably, the flow rate of nitrogen in the first step is 0.5-1 m/s.

Preferably, the flow rate of the nitrogen gas is 0.7 m/s.

Preferably, the temperature of the nitrogen in the first step is 30-60 ℃.

Preferably, the temperature of the nitrogen gas is 45 ℃.

Preferably, k is as defined in step four ₁、k ₂、k ₃、k ₄And k ₅The values of (A) are 0.15, 0.2, 0.15, 0.2 and 0.3 respectively.

The invention has the beneficial effects that: the method adopts five detection chambers, a plurality of gas sensors with the same type are arranged at the same positions in the five detection chambers to detect the quality of the gaseous linseed oil, and the data detected by the gas sensors are processed and then compared with the template data, so that the quality of the linseed oil can be rapidly and accurately identified; simultaneously, the gas sensors with the same type are selected, so that errors caused by the type difference of the gas sensors can be reduced, and the detection precision of the linseed oil quality can be greatly improved by arranging the positions of the gas sensors and processing detected data.

Drawings

FIG. 1 is a schematic view of the structure of a detection chamber according to the present invention;

FIG. 2 is a top view of the detection chamber of the present invention;

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.