CN108519376A - The rapid assay methods of acid value in a kind of frying process edible oil - Google Patents
The rapid assay methods of acid value in a kind of frying process edible oil Download PDFInfo
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- CN108519376A CN108519376A CN201810320338.3A CN201810320338A CN108519376A CN 108519376 A CN108519376 A CN 108519376A CN 201810320338 A CN201810320338 A CN 201810320338A CN 108519376 A CN108519376 A CN 108519376A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/775—Indicator and selective membrane
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Abstract
The present invention relates to the rapid determination devices and its application method of acid value in a kind of frying process edible oil.The device includes sampling part and measures part, and sampling part is syringe construction, and sampling inner barrel cavity is divided into indicator and solvent seal area and sampling area, and sampling area is calculated the volume of sampling area by sampling cylinder internal diameter, to realize quantization sampling；Indicator and solvent seal area is arranged in sampling area upper end, and diaphragm seal is arranged in indicator and solvent seal area bottom, and hard sealing plate is arranged in top；Determination part is divided into the container that bottom is provided with the standard solution seal area of potassium hydroxide, and the volume of the standard solution seal area of potassium hydroxide is calculated according to standard solution itself concentration and sampling part sampling area volume of potassium hydroxide to be obtained, strictly quantitatively to detect.Structure of the invention, easy realization of low cost, easy to operate can be provided fast and accurately without the requirement of developing time and temperature as a result, to the standardization of effective monitoring food materials, ensureing that food security is of great significance.
Description
Technical field
The invention belongs to food oil detection technique fields, and in particular to acid value is quick in a kind of frying process edible oil
Measurement device and application method.
Background technology
Acid value (Acidvalue) or neutralization number, acid value (Acidnumber), acidity refer to neutralizing 1 gram of grease middle reaches
Milligram number from the potassium hydroxide (KOH) needed for aliphatic acid.It is to the carboxylic that dissociates in compound (such as aliphatic acid) or mixture
One measurement criteria of acid groups quantity.The unit of acid value：(KOH) /(mg/g).The fresh pure oil obtained with normal raw material
Fat, acid value is very low, is no more than 2~3mg/g, and the acid value of edible oil and fat must not be higher than 5mg/g.Acid value determination generally uses acid value to survey
Determine test paper.Card form is made using the scraps of paper as carrier, is reacted with free fatty by color developing agent, is shown on the scraps of paper
The degree of color is directly proportional to the content of free fatty, and the semiquantitative determination of acid value is reached with this.
Frying process oil is due to the Reusability in food production and process, and color is partially deep, and severe jamming is in acid
Valence measures display color and degree on test paper, influences the accuracy of result.In addition, acid value determination test paper although side easy to operate
Just, but the decision of its Method And Principle can only obtain sxemiquantitative even qualitatively as a result, it cannot be guaranteed that the accuracy of result.Food and drink with
Frying process oilconsumption needed for food production processing link is big, and inaccuracy as a result can not only be caused to enterprise in cost
Increase, while also increasing supervision and inspecting underproof potential risk by random samples.
Invention content
It is a primary object of the present invention to overcome the deficiencies of the prior art and provide one kind easy realization easy to operate, without aobvious
The requirement of color time and temperature, and can rapidly and accurately provide the frying process oleic acid of testing result at production operation scene
The rapid determination device of valence.
To achieve the above object, present invention employs following technical schemes：
The rapid determination device of acid value in a kind of frying process edible oil, including sampling part and part is measured, wherein：
Sampling part is syringe construction, and probe tube is arranged in sampling cylinder bottom end, and probe tube is connected to sampling cylinder；Sampling
Installation piston and push rod in cylinder, piston external diameter are equal to sampling cylinder internal diameter, i.e. for piston along sampling cylinder inboard wall sliding, piston is solid
Dingan County is mounted in push rod bottom, and handle is equipped at the top of push rod；Sampling inner barrel cavity is divided into indicator and solvent seal area
And sampling area, sampling inner barrel cavity lower part are sampling area, the volume of sampling area are calculated by sampling cylinder internal diameter, with the amount of realization
Change sampling；Sampling area upper end samples inner barrel cavity top setting indicator and solvent seal area, indicator and solvent are close
Diaphragm seal is arranged in the bottoms Feng Qu, and hard sealing plate is arranged at the top of indicator and solvent seal area, is fixed on sampling cylinder inboard wall
Diaphragm seal and hard sealing plate on the through-hole that passes through of setting push rod and keep sealing；Indicator and solvent seal area sealed bottom
Film is trivial separated by sampling area and indicator and solvent seal；
Determination part is divided into the container that bottom is provided with the standard solution seal area of potassium hydroxide, the standard solution of potassium hydroxide
The standard solution seal area that container bottom constitutes potassium hydroxide is sealed in by diaphragm seal；The standard solution seal area of potassium hydroxide
Volume is calculated according to standard solution itself concentration and sampling part sampling area volume of potassium hydroxide and is obtained, strictly quantitatively to examine
It surveys.
Further, on the sampling cylinder body outer wall of the sampling part, corresponding internal cavity indicator and solvent seal
The separated place setting flag groove of area and sampling area.
Further, on the sampling area cylinder body outer wall of the sampling part, corresponding sample inner barrel cavity sampling area
Volume cue mark groove is set.
Further, the internal diameter of the measurement part is more than the internal diameter of sampling part, is convenient for sampling part by acquirement
Oil sample is put into measurement part and is measured.
Further, the indicator of the sampling part and the indicator of solvent seal area interior sealing are Thymol
Phthalein.
Further, the rapid determination device of acid value uses polytetrafluoroethylene material in the frying process edible oil
It is made.Polytetrafluoroethylene (PTFE) has excellent chemical stability, corrosion resistance, sealing property, high lubrication, non-stickiness, electrical insulation and good
Good anti-aging endurance etc..It is easy to process, it can be made into polyfluortetraethylene pipe, stick, band, plate, film etc..
The working method of the present invention is as follows：
With the present invention when carrying out frying process and being detected with edible oil, first oil sampling, sampling portion are carried out with sampling part
The bottom for dividing the piston of original state to be located at sampling cylinder, probe tube is inserted into sample to be tested oil；It then will by handle
Piston pulls upwardly on, until at piston to sampling area and indicator and solvent seal area separated place label groove, that is, realizes sampling sample
The quantization of product continues up at the top of pull piston to indicator and solvent seal area at hard sealing plate, realizes solvent, indicator
With being sufficiently mixed for sample.
After the completion of sampling, sampling part is moved into measurement partial interior, partial containers bottom is measured and potassium hydroxide is housed
Standard solution, dosage and it is a concentration of it is accurate calculate as a result, and sealed by thin-film material, the sample of sampling part is mixed molten
Agent is mixed with potassium hydroxide solution, if mixed solution is blue, illustrates that acid value is not exceeded in sample, which can also continue to
It uses, if the unchanged indigo plant of mixed solution, illustrates that acid value has been more than requirements of the national standard in sample, has been not suitable for reusing.
Compared with the prior art, the invention has the advantages that：
Structure of the invention, easy realization of low cost, easy to operate are made without the requirement of developing time and temperature in production
Industry scene can fast and accurately provide as a result, the risk for helping enterprise to reduce production cost and failed sample；The finger of use
Show that agent is thymolphthalein reagent, which is suitable for the oil sample in dark pool, and it is deep to solve the oily color of frying process
Caused interference problem；In addition, sample quantization, bioassay standard amount of solution, quantity of solvent etc. are in state compulsion standard
It is calculated on the basis of it is required that, realizes quantitative measurement.
Based on the above reasons, the present invention can be promoted in field of food, more particularly, to the edible oil food of frying process
Field, effective monitoring food materials standardization, ensures food security, has important market popularization value.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
Other drawings may also be obtained based on these drawings.
Fig. 1 is that the structure of the sampling part of the rapid determination device of acid value in frying process edible oil in embodiment 1 is shown
It is intended to；
Fig. 2 is that the structure of the measurement part of the rapid determination device of acid value in frying process edible oil in embodiment 1 is shown
It is intended to；
In figure：A sampling parts, A1 handles, A2 push rods, A3 sample cylinder, A4 indicator and solvent seal area, A5 samplings
Area, A6 pistons, A7 probe tubes, B measure part, the standard solution seal area of B1 potassium hydroxide.
Specific implementation mode
Technical scheme of the present invention is further described in detail with reference to example.
Embodiment 1
The rapid determination device of acid value in a kind of frying process edible oil, including sampling part and part is measured, it uses
Polytetrafluoroethylene material is made, wherein：
As shown in Figure 1, sampling part A is syringe construction, sampling cylinder A3 bottom ends are arranged probe tube A7, probe tube A7 with
Sample cylinder A3 connections；It sampling and piston A6 and push rod A2 is installed in cylinder A3, piston A6 outer diameters are equal to sampling cylinder A3 internal diameters,
That is piston A6 is fixedly mounted on the bottoms push rod A2, handle is equipped at the top of push rod A2 along sampling cylinder A3 inner walls sliding, piston A6
A1；Sampling cylinder A3 internal cavities are divided into indicator and solvent seal area A4 and sampling area A5, sample cylinder A3 internal cavities
Lower part is sampling area A5, and the volume of sampling area A5 is calculated by sampling cylinder A3 internal diameters：Sampler barrel A3 internal diameters are 1.5cm, and deduction pushes away
Bar internal diameter 0.3cm, actual inner diameter 1.2cm；It is 2.5g that the device, which requires sampling amount, since frying process edible oil is by making
Common edible oil it has been more than with density, density is between 0.98-1.0kg/L, i.e., sampling amount need to be 2.5mL, by this stereometer
Calculate, piston between diaphragm seal highly be 2.5cm (the thickness 0.3cm containing piston)；Realize quantization sampling.
The upper ends sampling area A5 sample cylinder A3 internal cavities top setting indicator and solvent seal area A4, indicator and
Solvent seal area A4 interior sealings are ether-isopropanol by 1:The solvent 10-30mL and thymolphthalein of 1 ratio mixing refer to
Show agent (95% ethyl alcohol is solvent) 2-3 drops.Teflon seal film, indicator is arranged in indicator and the solvent seal area bottoms A4
With setting polytetrafluoroethylene (PTFE) hard sealing plate at the top of solvent seal area, the diaphragm seal and hard being fixed on sampling cylinder A3 inner walls
The through-hole that push rod A2 is passed through is set on sealing plate and keeps sealing；Indicator and solvent seal area A4 sealed bottoms film will sample
Area A5 and indicator and solvent seal area A4 are distinguished.Internal cavity sampling area A5 setting volumes are corresponded on sampling cylinder A3 outer walls
Cue mark groove, the separated place setting flag groove of corresponding indicator and solvent seal area A4 and sampling area A5, with the amount of convenience
Change sampling.
As shown in Fig. 2, the container that part B is the standard solution seal area B1 that bottom is provided with potassium hydroxide is measured, in
Diameter is more than the internal diameter of sampling part, and the standard solution of potassium hydroxide is sealed in container bottom by teflon seal film and constitutes hydrogen
The standard solution seal area B1 of potassium oxide；The standard solution density of potassium hydroxide is 0.01mol/L, according to requirements of the national standard
Acid value threshold limit value 5mg/g and sampling amount 2.5g, standard potassium hydroxide liquor capacity needed for seal area B1, which is calculated, is
23mL realizes quantitative detection.
The rapid determination device of acid value in above-mentioned Frying edible oils, according to standard GB/T 7102.1-2003《It is edible to plant
Sanitary standard during object fry is fried》Middle regulation acid value is not greater than the requirement of 5mg/g, and frying process oil, measurement is molten
The dosage of liquid hydrogen potassium oxide, solvent ether-isopropanol mixed liquor and Thymol phthalein indicator is calculated by stringent, is gone forward side by side
Row quantization.
When carrying out Frying edible oils detection with the rapid determination device of acid value in above-mentioned Frying edible oils, sampling part is first used
A carries out oil sampling, and the piston A6 of sampling part original state is located at the bottom of sampling cylinder A3, probe tube A7 is inserted into and is waited for
In sample oil；Then piston A6 is pulled upwardly on by handle A1, until piston A6 to sampling area A5 and indicator and solvent are close
It seals at the label groove of the area separated places A4, that is, realizes the quantization of sampling sample, continue up pull piston A6 to indicator and solvent
At the top of seal area A4 at hard sealing plate, being sufficiently mixed for solvent, indicator and sample is realized.
After the completion of sampling, sampling part A is moved to and is measured inside the B of part, measured part B container bottoms and potassium hydroxide is housed
Standard solution, dosage and it is a concentration of it is accurate calculate as a result, and sealed by PTFE film material, by sampling part
The sample mixed solvent of A is mixed with potassium hydroxide solution, if mixed solution is blue, illustrates that acid value is not exceeded in sample oil,
The sample can also continue to use, if the unchanged indigo plant of mixed solution, illustrate that acid value has been more than requirements of the national standard in sample oil,
Through being not suitable for reusing.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. the rapid determination device and its application method of acid value in a kind of frying process edible oil, which is characterized in that including taking
Sample part and measurement part, wherein：
Sampling part is syringe construction, and probe tube is arranged in sampling cylinder bottom end, and probe tube is connected to sampling cylinder；Sample cylinder
Interior installation piston and push rod, piston external diameter are equal to sampling cylinder internal diameter, i.e. piston fixes peace along sampling cylinder inboard wall sliding, piston
Mounted in push rod bottom, handle is installed at the top of push rod；Sampling inner barrel cavity is divided into indicator and solvent seal area and takes
Sample area, sampling inner barrel cavity lower part are sampling area, and the volume of sampling area is calculated by sampling cylinder internal diameter, to realize that quantization takes
Sample；Sampling area upper end samples inner barrel cavity top setting indicator and solvent seal area, indicator and solvent seal area
Diaphragm seal is arranged in bottom, and hard sealing plate is arranged at the top of indicator and solvent seal area, is fixed on close on sampling cylinder inboard wall
The through-hole that push rod passes through is set in sealer and hard sealing plate and keeps sealing；Indicator and solvent seal area sealed bottom film will
Sampling area and indicator and solvent seal are trivial separated；
Determination part is divided into the container that bottom is provided with the standard solution seal area of potassium hydroxide, and the standard solution of potassium hydroxide is by close
Sealer is sealed in the standard solution seal area that container bottom constitutes potassium hydroxide；The volume of the standard solution seal area of potassium hydroxide
It is calculated and is obtained according to itself concentration of the standard solution of potassium hydroxide and sampling part sampling area volume, strictly quantitatively to detect.
2. the rapid determination device of acid value in a kind of frying process edible oil according to claim 1, which is characterized in that
On the sampling cylinder body outer wall of the sampling part, internal cavity indicator and solvent seal area and the separated place of sampling area are corresponded to
Setting flag groove.
3. the rapid determination device of acid value in a kind of frying process edible oil according to claim 1, which is characterized in that
On the sampling area cylinder body outer wall of the sampling part, corresponding sample inner barrel cavity sampling area is arranged volume cue mark and carves
Line.
4. the rapid determination device of acid value in a kind of frying process edible oil according to claim 1, which is characterized in that
The internal diameter of the described measurement part is more than the internal diameter of sampling part, convenient for sampling part by the oil sample of acquirement be put into measurement part into
Row measures.
5. the rapid determination device of acid value in a kind of frying process edible oil according to claim 1, which is characterized in that
The indicator of the sampling part and the indicator of solvent seal area interior sealing are thymolphthalein.
6. the rapid determination device of acid value in a kind of frying process edible oil according to claim 1, which is characterized in that
It is made of polytetrafluoroethylene material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810320338.3A CN108519376A (en) | 2018-04-11 | 2018-04-11 | The rapid assay methods of acid value in a kind of frying process edible oil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810320338.3A CN108519376A (en) | 2018-04-11 | 2018-04-11 | The rapid assay methods of acid value in a kind of frying process edible oil |
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| Publication Number | Publication Date |
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| CN108519376A true CN108519376A (en) | 2018-09-11 |
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| CN201810320338.3A Pending CN108519376A (en) | 2018-04-11 | 2018-04-11 | The rapid assay methods of acid value in a kind of frying process edible oil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289508A (en) * | 2018-12-07 | 2020-06-16 | 云南商测质量检验技术服务有限公司 | Acid value rapid test paper and detection method thereof |
| CN114002214A (en) * | 2021-09-28 | 2022-02-01 | 中国农业科学院油料作物研究所 | Test strip for detecting acid value of edible oleic acid, preparation method and application thereof |
-
2018
- 2018-04-11 CN CN201810320338.3A patent/CN108519376A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289508A (en) * | 2018-12-07 | 2020-06-16 | 云南商测质量检验技术服务有限公司 | Acid value rapid test paper and detection method thereof |
| CN114002214A (en) * | 2021-09-28 | 2022-02-01 | 中国农业科学院油料作物研究所 | Test strip for detecting acid value of edible oleic acid, preparation method and application thereof |
| CN114002214B (en) * | 2021-09-28 | 2024-01-16 | 中国农业科学院油料作物研究所 | Edible oil acid value detection test strip, preparation method and application |
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Application publication date: 20180911 |