WO2016185524A1 - 油劣化度計及び油劣化度評価方法 - Google Patents
油劣化度計及び油劣化度評価方法 Download PDFInfo
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- WO2016185524A1 WO2016185524A1 PCT/JP2015/064074 JP2015064074W WO2016185524A1 WO 2016185524 A1 WO2016185524 A1 WO 2016185524A1 JP 2015064074 W JP2015064074 W JP 2015064074W WO 2016185524 A1 WO2016185524 A1 WO 2016185524A1
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- oil
- dielectric constant
- fat
- acid value
- time
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000015556 catabolic process Effects 0.000 title abstract description 13
- 238000006731 degradation reaction Methods 0.000 title abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 239000003921 oil Substances 0.000 claims description 101
- 239000003925 fat Substances 0.000 claims description 70
- 239000002253 acid Substances 0.000 claims description 56
- 230000006866 deterioration Effects 0.000 claims description 35
- 238000011156 evaluation Methods 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 13
- 235000013305 food Nutrition 0.000 abstract description 11
- 230000002378 acidificating effect Effects 0.000 abstract 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 235000021588 free fatty acids Nutrition 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
- G01N33/03—Edible oils or edible fats
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2805—Oils, i.e. hydrocarbon liquids investigating the resistance to heat or oxidation
Definitions
- the present invention relates to an oil deterioration degree meter and an oil deterioration degree evaluation method for evaluating the state of fats and oils.
- TPM value Total ⁇ ⁇ Polar Materials
- AV value Acid Value
- the TPM value is a general name for edible fats and oils, such as free fatty acids generated by moisture in foodstuffs (fried food), aromatic compounds that increase by heating, and substances that are oxidized and generated by contact with air.
- the amount of TPM is used as an index. This TPM value can be derived from the measurement result of the dielectric constant of fats and oils.
- AV value is defined by the amount (mg) of potassium hydroxide (KOH) required to neutralize free fatty acids present in 1 g of edible fats and oils.
- the TPM value is used as an index
- the AV value is used as an index
- the TPM value can be easily measured.
- the measurement of the amount of potassium hydroxide required to neutralize free fatty acids must be based on neutralization titration and is not easy.
- the present invention has been proposed in view of the above-described circumstances, and even when conditions such as the amount of moisture in the food (fried food) are different, the fats and oils using the acid value (AV value) as an index.
- the purpose of the present invention is to provide an oil deterioration meter and an oil deterioration degree evaluation method that enable the user to arbitrarily set the deterioration degree of oil and can easily know the oil replacement time with stable reproducibility. To do.
- an oil deterioration meter according to the present invention has the following configuration.
- Dielectric constant measuring means for measuring the dielectric constant of the sample oil, storage means for storing the dielectric constant measured by the dielectric constant measuring means, and input means for inputting the acid value and storing the input acid value in the storage means ,
- a calculation means for performing a calculation based on the dielectric constant and acid value stored in the storage means, and a control means for controlling the dielectric constant measurement means, the input means, the storage means and the calculation means, the control means in the setting mode.
- the acid value (AV 0 ) of the unused fat / oil is set to 0, the dielectric constant (D 0 ) at this time is measured and stored in the storage means, and the dielectric constant (D 100 ) of the fat / oil at the time of replacement in a specific fat / oil use situation Is measured and stored in the storage means together with the acid value (AV 100 ) at this time.
- the dielectric constant (D n ) of the sample fat is measured, and the measurement result (D n ) is stored in the storage means.
- the calculation means [AV n AV 100 ⁇ ⁇ (D n ⁇ D 0 ) / (D 100 -D 0 ) ⁇ ] to calculate the acid value (AV n ) of the sample fat.
- the oil deterioration degree evaluation method according to the present invention has the following configuration.
- the acid value (AV 0 ) and dielectric constant (D 0 ) of the unused oil / fat are recorded, and the oil / fat at the replacement time in a specific oil / fat use situation is recorded.
- the percentage until the replacement time is calculated from the measured dielectric constant (D n ) of the sample oil and fat.
- the oil and oil replacement time is determined by converting this into an acid value based on an objective and highly reliable measurement value of the dielectric constant. I can know.
- the present invention allows the user to arbitrarily set the degree of deterioration of fats and oils using the acid value (AV value) as an index even when conditions such as the amount of moisture in the food (fried food) are different.
- AV value acid value
- FIG. 1 is a block diagram showing the configuration of an oil deterioration meter according to the present invention.
- This oil deterioration meter is a device that measures the dielectric constant of a sample oil and fat, and calculates an AV value (acid value) from the measurement result.
- This oil deterioration meter is provided with a CPU 1 as a control means as shown in FIG.
- the CPU 1 controls a dielectric constant sensor 2 serving as a dielectric constant measuring unit.
- the dielectric constant sensor 2 has a comb electrode immersed in the sample oil and fat, and by applying an AC voltage between the comb electrodes, the impedance of the sample oil and fat can be measured from a change in frequency. From the measurement result of this impedance, the dielectric constant of the sample fat can be calculated.
- the CPU 1 controls the input unit 4 serving as input means and processes an input signal from the input unit 4.
- commands such as various numerical values and operation mode selection can be input to the input unit 4.
- the CPU1 controls the memory 3 used as a memory
- the memory 3 stores a dielectric constant measured by the dielectric constant sensor 2, an input AV value (acid value), and other various numerical values.
- the CPU 1 controls the arithmetic circuit 5 serving as arithmetic means.
- the arithmetic circuit 5 performs calculations based on the dielectric constant and AV value (acid value) stored in the memory 3 and various other calculations.
- a liquid crystal display unit 6 is connected to the CPU 1.
- the liquid crystal display unit 6 displays various information such as an AV value (acid value) input by the user of the apparatus, other various numerical values, and a calculation result by the calculation circuit 5.
- FIG. 2 is a graph showing the relationship between the dielectric constant of oil and fat and the acid value (AV value).
- FIG. 2 is a graph showing the relationship between the dielectric constant of fats and oils and the acid value (AV value) in Karaage store (1), Karaage store (2), and Karaage store (3).
- (B) in FIG. 2 is a graph showing the relationship between the dielectric constant of fats and oils and the acid value (AV value) at tempura stores, Japanese restaurants, butchers and supermarkets.
- FIG. 2 shows the relationship between the dielectric constant of oil and fat and the acid value (AV value).
- the relationship between the dielectric constant of fats and oils and the AV value varies depending on conditions such as the amount of moisture in the food (fried food) to be handled. That is, when the relationship between the dielectric constant and the AV value is linearly approximated, the slope of the linear approximation formula varies depending on the store. This is thought to be due to differences in the type of fried food and the heating time. For example, when the amount and frequency of frying are high as shown in (a) of FIG. 2, compared to the other stores shown in (b) of FIG. Thus, the rate at which the AV value increases is large, and the slope of the linear approximation formula is steep.
- FIG. 3 is a flowchart for explaining the oil deterioration degree evaluation method according to the present invention.
- This oil deterioration meter operates as shown in FIG. 3 to execute the oil deterioration degree evaluation method according to the present invention.
- step st1 when an instruction for starting the setting mode is input, the CPU 1 starts execution of the setting mode (setting procedure) in step st1, proceeds to step st2, sets the acid value (AV 0 ) of unused oil and fat to 0, The dielectric constant (D 0 ) at this time is measured and stored (recorded) in the memory 3.
- the dielectric constant (D 100 ) of the oil and fat at the replacement time (use limit) in a specific oil and fat use situation is measured and stored (recorded) in the memory 3 together with the acid value (AV 100 ) at this time.
- the acid value (AV 100 ) at this time is obtained by a measuring method such as neutralization titration.
- fats and oils refers to the use of fats and oils at each store such as Karaage store (1), Karaage store (2), Karaage store (3), Tempura store, Japanese restaurant, butchery, supermarket, etc. If it is the same store, the use situation of fats and oils is considered to be constant.
- step st4 when a measurement mode start command is input, the CPU 1 starts executing the measurement mode (setting procedure), proceeds to step st5, and measures the dielectric constant (D n ) of the sample fat.
- the measurement result (D n ) is stored (recorded) in the memory 3.
- the CPU 1 proceeds to step st6, and based on the dielectric constant (D 0 , D 100 ) and acid value (AV 100 ) stored (recorded) in the memory 3 in the setting mode, the arithmetic circuit 5 performs the following.
- the acid value (AV n ) of the sample fat is calculated using an arithmetic expression.
- AV n AV 100 ⁇ ⁇ (D n ⁇ D 0 ) / (D 100 ⁇ D 0 ) ⁇
- step st7 the CPU 1 proceeds to step st7, and displays the calculated acid value (AV n ) of the sample fat on the liquid crystal display unit 6.
- the acid value (AV 100 ) of the oil and fat at the time of replacement may be defined as 100.
- the acid value (AV n ) of the sample fat calculated from the measured dielectric constant (D n ) of the sample fat represents a percentage until the replacement time.
- ⁇ D (D 100 -D 0 ) / 100
- the deterioration degree A n (D n ⁇ D 0 ) / ⁇ D
- the present invention is applied to an oil deterioration degree meter and an oil deterioration degree evaluation method for evaluating the state of fats and oils.
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Abstract
Description
試料油脂の誘電率を測定する誘電率測定手段と、誘電率測定手段により測定された誘電率を記憶する記憶手段と、酸価を入力し入力された酸価を記憶手段に記憶させる入力手段と、記憶手段に記憶された誘電率及び酸価に基づく演算を行う演算手段と、誘電率測定手段、入力手段、記憶手段及び演算手段を制御する制御手段とを備え、制御手段は、設定モードにおいて、未使用油脂の酸価(AV0)を0とし、このときの誘電率(D0)を測定し記憶手段に記憶させ、特定の油脂使用状況における交換時期の油脂の誘電率(D100)を測定し、このときの酸価(AV100)とともに記憶手段に記憶させ、測定モードにおいて、試料油脂の誘電率(Dn)を測定し、この測定結果(Dn)を記憶手段に記憶させ、記憶手段に設定モードにおいて記憶された誘電率(D0,D100)及び酸価(AV100)に基づいて、演算手段により、演算式〔AVn=AV100×{(Dn-D0)/(D100-D0)}〕により、試料油脂の酸価(AVn)を算出することを特徴とするものである。
構成1を有する油劣化度計において、交換時期の油脂の酸価(AV100)を100と定義することを特徴とするものである。
設定手順において、未使用油脂の酸価(AV0)を0とし、このときの誘電率(D0)を測定して記録しておき、特定の油脂使用状況における交換時期の油脂の誘電率(D100)を測定し、このときの酸価(AV100)とともに記録しておき、測定手順において、試料油脂の誘電率(Dn)を測定し、設定手順において記録された誘電率(D0,D100)及び酸価(AV100)に基づいて、演算式〔AVn=AV100×{(Dn-D0)/(D100-D0)}〕により、試料油脂の酸価(AVn)を算出することを特徴とするものである。
構成3を有する油劣化度評価方法において、交換時期の油脂の酸価(AV100)を100と定義することを特徴とするものである。
図1は、本発明に係る油劣化度計の構成を示すブロック図である。
図2は、油脂の誘電率と酸価(AV値)との関係を示すグラフである。
AVn=AV100×{(Dn-D0)/(D100-D0)}
この油劣化度計において、交換時期の油脂の酸価(AV100)を100と定義することとしてもよい。この場合には、測定された試料油脂の誘電率(Dn)より算出される試料油脂の酸価(AVn)は、交換時期までの百分率を示すことになる。
この油劣化度計においては、試料油脂の未使用状態S0と交換時期(使用限界)S100における油脂の誘電率、すなわちS0の誘電率D0とS100の誘電率D100との間を、例えば100等分して、目盛を設定することとしてもよい。なお、このように等分する数値は、100でなくともよい。
1degree:δD=(D100-D0)/100
An=(Dn-D0)/δD
2 誘電率センサ
3 メモリ
4 入力部
5 演算回路
Claims (4)
- 試料油脂の誘電率を測定する誘電率測定手段と、
前記誘電率測定手段により測定された誘電率を記憶する記憶手段と、
酸価を入力し、入力された酸価を前記記憶手段に記憶させる入力手段と、
前記記憶手段に記憶された誘電率及び酸価に基づく演算を行う演算手段と、
前記誘電率測定手段、前記入力手段、前記記憶手段及び前記演算手段を制御する制御手段と
を備え、
前記制御手段は、設定モードにおいて、未使用油脂の酸価(AV0)を0とし、このときの誘電率(D0)を測定し、前記記憶手段に記憶させ、特定の油脂使用状況における交換時期の油脂の誘電率(D100)を測定し、このときの酸価(AV100)とともに前記記憶手段に記憶させ、
前記制御手段は、測定モードにおいて、試料油脂の誘電率(Dn)を測定し、この測定結果(Dn)を前記記憶手段に記憶させ、前記記憶手段に前記設定モードにおいて記憶された誘電率(D0,D100)及び酸価(AV100)に基づいて、前記演算手段により、演算式〔AVn=AV100×{(Dn-D0)/(D100-D0)}〕により、前記試料油脂の酸価(AVn)を算出する
ことを特徴とする油劣化度計。 - 交換時期の油脂の酸価(AV100)を100と定義する
ことを特徴とする請求項1記載の油劣化度計。 - 設定手順において、未使用油脂の酸価(AV0)を0とし、このときの誘電率(D0)を測定して記録しておき、特定の油脂使用状況における交換時期の油脂の誘電率(D100)を測定し、このときの酸価(AV100)とともに記録しておき、
測定手順において、試料油脂の誘電率(Dn)を測定し、前記設定手順において記録された誘電率(D0,D100)及び酸価(AV100)に基づいて、演算式〔AVn=AV100×{(Dn-D0)/(D100-D0)}〕により、前記試料油脂の酸価(AVn)を算出する
ことを特徴とする油劣化度評価方法。 - 交換時期の油脂の酸価(AV100)を100と定義する
ことを特徴とする請求項3記載の油劣化度評価方法。
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JP2017518634A JP6435565B2 (ja) | 2015-05-15 | 2015-05-15 | 油劣化度計及び油劣化度評価方法 |
US15/508,249 US10429332B2 (en) | 2015-05-15 | 2015-05-15 | Oil degradation meter and method for evaluating oil degradation |
EP15892524.8A EP3296729B1 (en) | 2015-05-15 | 2015-05-15 | Oil degradation meter and method for evaluating oil degradation |
CN201580049990.0A CN106716118B (zh) | 2015-05-15 | 2015-05-15 | 油脂老化计和油脂老化度评价方法 |
PCT/JP2015/064074 WO2016185524A1 (ja) | 2015-05-15 | 2015-05-15 | 油劣化度計及び油劣化度評価方法 |
KR1020177007269A KR101975308B1 (ko) | 2015-05-15 | 2015-05-15 | 오일 열화도계 및 오일 열화도 평가 방법 |
TW104120113A TWI574004B (zh) | 2015-05-15 | 2015-06-23 | 油劣化度計及油劣化度評價方法 |
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JPWO2016185524A1 (ja) | 2017-07-06 |
EP3296729A4 (en) | 2019-02-27 |
CN106716118A (zh) | 2017-05-24 |
CN106716118B (zh) | 2020-03-24 |
KR101975308B1 (ko) | 2019-05-07 |
TWI574004B (zh) | 2017-03-11 |
JP6435565B2 (ja) | 2018-12-12 |
EP3296729B1 (en) | 2020-11-25 |
TW201640105A (zh) | 2016-11-16 |
KR20170137692A (ko) | 2017-12-13 |
US10429332B2 (en) | 2019-10-01 |
US20170276629A1 (en) | 2017-09-28 |
EP3296729A1 (en) | 2018-03-21 |
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