CN104267163B - Shelf life storage indicator, preparation method and the method for inspection - Google Patents
Shelf life storage indicator, preparation method and the method for inspection Download PDFInfo
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Abstract
The present invention relates to a kind of shelf life storage indicator, preparation method and the method for inspection.This preparation method comprises: pulverize raw material, is that the ethanolic solution of 5-9% extracts, crosses leaching filtrate, be sealed in container as shelf life storage indicator with mass concentration; Raw material is leek or rose.This indicator is take leek as raw material, the short-term indicator that can indicate storage life below 4 DEG C in 6-8 days, or for being raw material, the long term indicator that can indicate storage life below 4 DEG C in 1 month with rose.This method of inspection comprises: at food production date, the required indicator of preparation, and puts together with food, then according to the condition adjudgement food preservation state of shelf life storage indicator.The present invention can intuitively indicate food preservation state, simple and easy to do.
Description
Technical field
The present invention relates to a kind of shelf life storage indicator, preparation method and the method for inspection, be particularly useful for the storage life instruction of 4 DEG C of store food, belong to food preservation inspection technology field.
Background technology
Storage life refers to that product keeps the time of its quality and security under the storage temperature condition of regulation.The storage life of product refers to the product quality assurance time limit under normal operation.The storage life of product is provided by the producer, is labeled on the product of use in limited time.In storage life, the manufacturing enterprise of product meets related standards to this product quality or the quality requirements of expressing guaranteeship is responsible for, and sellers can these products of relieved sale, and consumer can use safely.
Storage life is not the sole criterion identifying whether the products such as food go bad, may due to location mode, and the factors vary such as environment cause premature deterioration, so the products such as food should be as far as possible not yet due just edible in time in storage life.
At present, conventional date of manufacture mark method, can not reflect the accident change of the temperature variation in food preservation process, particularly some temperature.And some food may run into unexpected high temperature in preservation process, easy breed bacteria makes food spoilage, but this situation just can only be detected by quality inspection, is difficult to judge intuitively.
Summary of the invention
The goal of the invention that the present invention will realize is: overcome prior art Problems existing, providing a kind of shelf life storage indicator preparation method, can obtaining the indicator for intuitively indicating food preservation state with easy steps; Also provide this indicator and uses thereof simultaneously, and adopt the shelf life storage method of inspection of this indicator.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of shelf life storage indicator preparation method, comprises the following steps:
After being pulverized by raw material, add the ethanolic solution that mass concentration is 5-9%, the weight ratio of raw material and ethanolic solution is 1:4-6; Concussion crosses leaching filtrate after extracting, and filtrate is sealed in container, obtains shelf life storage indicator; Raw material is leek or rose; When raw material is leek, shelf life storage indicator is the short-term indicator that can indicate storage life below 4 DEG C in 6-8 days; When raw material is rose, shelf life storage indicator is the long term indicator that can indicate storage life below 4 DEG C in 1 month.
Preferably, the weight ratio of raw material and ethanolic solution is 1:5.
Preferably, stirring machine is adopted during pulverizing; Whirlpool concussion is adopted to extract when concussion is extracted at least 2 minutes; The miillpore filter of less than 0.22 μm is adopted during filtration.
Preferably, the material of container is transparent material.
More preferably, the material of container is transparent plastic or transparent glass material.
The present invention also provides:
A kind of shelf life storage indicator obtained by above-mentioned preparation method.
The present invention also provides:
Above-mentioned shelf life storage indicator is used as the purposes of instruction shelf life storage.
The present invention also provides:
A kind of shelf life storage method of inspection, comprises the following steps:
The first step, at food production date, prepare shelf life storage indicator by aforementioned preparation process, and the airtight container that shelf life storage indicator is housed together is transported with corresponding food, deposit and sells; Wherein, when shelf life storage be less than 4 DEG C in 6-8 days time then prepare short-term indicator, when shelf life storage be less than 4 DEG C in 1 month time then prepare long term indicator;
Second step, condition adjudgement food preservation state according to shelf life storage indicator:
When adopting short-term indicator, under static condition, if indicator is suspension green dispersion liquid, food does not cross storage life; If indicator is in the state of green precipitate and liquid layered, then judge according to the food production date: if now apart from the food production date more than 6-8 days; food cross storage life, if now apart from the food production date more than 6-8 days; deposited at least 3 hours in the hot environment of food once more than 35 DEG C;
When adopting long term indicator, if indicator color is rose-colored, then food does not cross storage life; If indicator color is crocus or Chinese red, then judge according to the food production date: if now apart from the food production date more than 1 month; food cross storage life, if now apart from the food production date more than 1 month; deposited at least 1 day in the hot environment of food once more than 35 DEG C; Test ending.
Applicant finds through in depth practical studies, the leek extract obtained by above-mentioned preparation method, rose extract color clear, and color depth is enough; Meanwhile, both is in the some skies of Cord blood or after high temperature short-term preservation, can produce the change of obvious state, be convenient to judge food preservation state; In addition, take leek as the storage life that the short-term indicator of raw material can be used in instruction less than 4 DEG C 6-8 days, take rose as the storage life that the long term indicator of raw material can be used in instruction less than 4 DEG C 1 month, the storage life of its time span and a lot of existing food matches, and has wide promotion prospect.
Compared with prior art, advantage of the present invention is as follows:
1, the unexpected high temperature storage environment (as more than 35 DEG C) in during record food storage can be caught;
2, preparation method's step is simple;
3, cheaper starting materials, too much can not increase cost of products;
4, pure natural plant extract, is easy to be accepted by mass psychology.
Accompanying drawing explanation
Fig. 1 to Fig. 8 is the result schematic diagram of the embodiment of the present invention 2.
Fig. 9 to Figure 44 is the result schematic diagram of the embodiment of the present invention 3.
Embodiment
Below by embodiment, the present invention will be further described, but the present invention is not limited only to these examples.
Embodiment 1 prepares shelf life storage indicator
Concrete steps are as follows:
After being pulverized with stirring machine by raw material, add the ethanolic solution that mass concentration is 5-9%, the weight ratio of raw material and ethanolic solution is 1:4-6 (preferred 1:5); Whirlpool concussion was extracted after at least 2 minutes, with the filtering with microporous membrane below 0.22 μm, got filtrate, filtrate was sealed in container that material is the transparent material such as transparent plastic or transparent glass material, obtained shelf life storage indicator.
Raw material is leek or rose; When raw material is leek, shelf life storage indicator is the short-term indicator that can indicate storage life below 4 DEG C in 6-8 days; When raw material is rose, shelf life storage indicator is the long term indicator that can indicate storage life below 4 DEG C in 1 month.
Embodiment 2 shelf life storage indicator effect experimental
Short-term indicator obtained for embodiment 1, long term indicator are preserved respectively under four kinds of conditions, then observes the state change of short-term indicator, long term indicator.
Four kinds of conditions of short-term indicator are: place 1 hour at 4 DEG C, place 3 days at 4 DEG C, place 7 days at 4 DEG C, place two days and place one day at 35 DEG C at 4 DEG C.Its result is as shown in Figures 1 to 4: in Fig. 1, Fig. 2, indicator state is the green dispersion liquid of suspension, in Fig. 3, Fig. 4, indicator is in the state of green precipitate and liquid layered, wherein Fig. 4 liquid color is shallower than Fig. 3 liquid color, Fig. 3 liquid color is shallower than Fig. 2 indicator color, and Fig. 2 indicator color is substantially identical with Fig. 1 indicator color.This result shows: short-term indicator can indicate less than the 4 DEG C shelf life storage in 6-8 days, if be once in the condition of high temperature during this period, state change can occur short-term indicator equally.
Four kinds of conditions of long term indicator are: place 1 hour at 4 DEG C, place 15 days at 4 DEG C, place 1 month at 4 DEG C, place 15 days and place one day at 35 DEG C at 4 DEG C.Its result is as shown in Fig. 5 to Fig. 8: in Fig. 5, Fig. 6, indicator color is rose-colored, and in Fig. 7, Fig. 8, indicator color is crocus.This result shows: long term indicator can indicate less than the 4 DEG C shelf life storage in 1 month, if be once in the condition of high temperature during this period, state change can occur long term indicator equally.
Embodiment 3 ethanol solution concentration is on the impact of indicating effect
(1) for the leek extract corresponding to short-term indicator: the ethanolic solution adopting mass concentration 5%, 15%, 25% respectively, and four kinds of leek extracts are prepared by embodiment 1 preparation method; Again these four kinds of leek extracts are preserved respectively under four kinds of conditions, then observe the state change of each extract.
Wherein, four kinds of conditions are: 0 hour, place 3 hours at 35 DEG C, place 24 hours and place six days at 4 DEG C at 35 DEG C, place seven days at 4 DEG C.
Result is as shown in Fig. 9 to Figure 20.
Wherein, Fig. 9 to Figure 12 is the constitutional diagram of leek extract under four kinds of conditions of mass concentration 5% ethanolic solution, Fig. 9 is the green dispersion liquid of suspension, Figure 10, Figure 11, Figure 12 are in the state of green precipitate and liquid layered, and Figure 11 liquid color is shallower than Figure 10 liquid color, Figure 10 liquid color is shallower than Figure 12 liquid color.
Figure 13 to Figure 16 is the constitutional diagram of leek extract under four kinds of conditions of mass concentration 15% ethanolic solution, and Figure 13 is suspension light green color dispersion liquid, and Figure 13 color is obviously shallower than Fig. 9 color; Figure 14, Figure 15, Figure 16 are in the state of green precipitate and liquid layered, and Figure 15 liquid color is shallower than Figure 14 liquid color, and Figure 14 liquid color is shallower than Figure 16 liquid color.
Figure 17 to Figure 20 is the constitutional diagram of leek extract under four kinds of conditions of mass concentration 25% ethanolic solution, all substantially in colourless transparent liquid, and without precipitation.
It can thus be appreciated that for leek extract, ethanolic solution mass concentration is higher, then extract color is more shallow, and to temperature variation and standing time more and more insensitive.Have based on this, applicant is 5-9% by further testing the ethanolic solution mass concentration determining leek extract, can ensure the indicating effect of indicator like this.
(2) for the rose extract corresponding to long term indicator: the ethanolic solution adopting mass concentration 5%, 15%, 25%, 50%, 75%, 95% respectively, and six kinds of rose extract are prepared by embodiment 1 preparation method; Again these six kinds of rose extract are preserved respectively under four kinds of conditions, then observe the state change of each extract.
Wherein, four kinds of conditions are: 0 hour, place 24 hours at 35 DEG C, place 24 hours and place six days at 4 DEG C at 35 DEG C, place seven days at 4 DEG C.
Result is as shown in Figure 21 to Figure 44.
Wherein, Figure 21 to Figure 24 is the constitutional diagram of rose extract under four kinds of conditions of mass concentration 5% ethanolic solution, and Figure 21, Figure 24 are all in rose-colored, and Figure 22 is Chinese red, and Figure 23 is crocus.
Figure 25 to Figure 28 is the constitutional diagram of rose extract under four kinds of conditions of mass concentration 15% ethanolic solution, and Figure 25 is rose-colored, and Figure 25 color is obviously shallower than Figure 21 color; Figure 28 is rose-colored, and Figure 26 is Chinese red, and Figure 27 is crocus.
Figure 29 to Figure 32 is the constitutional diagram of rose extract under four kinds of conditions of mass concentration 25% ethanolic solution, and Figure 29, Figure 32 are Chinese red, and Figure 30, Figure 31 are crocus.
Figure 33 to Figure 36 is the constitutional diagram of rose extract under four kinds of conditions of mass concentration 50% ethanolic solution, all in crocus.
Figure 37 to Figure 40 is the constitutional diagram of rose extract under four kinds of conditions of mass concentration 75% ethanolic solution, all in crocus.
Figure 41 to Figure 44 is the constitutional diagram of rose extract under four kinds of conditions of mass concentration 95% ethanolic solution, all in shallow crocus.
It can thus be appreciated that for rose extract, ethanolic solution mass concentration is higher, then extract color transfers the even shallow crocus of crocus gradually to, and to temperature variation and standing time more and more insensitive.Have based on this, applicant is 5-9% by further testing the ethanolic solution mass concentration determining rose extract, can ensure the indicating effect of indicator like this.
Embodiment 4 hot environment is on the impact of extract absorbance
First, respectively with the ethanolic solution of mass concentration 5%, 15%, 25%, by embodiment 1 preparation method, prepare three kinds of leek extracts, three kinds of rose extract.5 parallel sampleses are done respectively during preparation.
Then, under each extract being put 35 DEG C of hot environments, detect absorbance data at time point 0h, 3h, 6h, 12h, 18h, 24h; The determined wavelength of leek extract is 638nm, and the determined wavelength of rose extract is 480nm.
Result is as shown in the table:
Combined from above result and observe:
(1) concentration of alcohol is larger, and extract is less at the absorbance of 0h, and the absorbance variation tendency of extract can be more not obvious, is unfavorable for instruction.The result of this point and embodiment 3 is coincide.
(2), for leek extract, when adopting mass concentration 5% ethanolic solution, place 3h at 35 DEG C, not only absorbance declines to a great extent, and have also appeared and obviously precipitates, and supernatant green obviously shoals.This shows, the short-term indicator that embodiment 1 obtains can indicate the situation of placing more than 3h at 35 DEG C.
(3), for rose extract, when adopting mass concentration 5% ethanolic solution, after placing 24h at 35 DEG C, absorbance obviously declines, and color transfers Chinese red to.This shows, the long term indicator that embodiment 1 obtains can indicate the situation of placing more than 24h at 35 DEG C.
(4), when adopting mass concentration 5% ethanolic solution, at each time point, between the parallel samples of leek or rose extract, absorbance is highly stable, and standard error is less.It can thus be appreciated that the extract obtained by embodiment 1 preparation method is reproducible, and indicating effect is reliable and stable.
The result of integrated embodiment 2 to 4, can draw the shelf life storage method of inspection, comprise:
The first step, at food production date, by embodiment 1, preparation method prepares shelf life storage indicator, and the airtight container that shelf life storage indicator is housed together is transported with corresponding food, deposit and sold; Wherein, when shelf life storage be less than 4 DEG C in 6-8 days time then prepare short-term indicator, when shelf life storage be less than 4 DEG C in 1 month time then prepare long term indicator;
Second step, judge food preservation state according to shelf life storage indicator:
When adopting short-term indicator, under static condition, if indicator is suspension green dispersion liquid, food does not cross storage life; If indicator is in the state of green precipitate and liquid layered, then judge according to the food production date: if now apart from the food production date more than 6-8 days; food cross storage life, if now apart from the food production date more than 6-8 days; deposited at least 3 hours in the hot environment of food once more than 35 DEG C;
When adopting long term indicator, if indicator color is rose-colored, then food does not cross storage life; If indicator color is crocus or Chinese red, then judge according to the food production date: if now apart from the food production date more than 1 month; food cross storage life, if now apart from the food production date more than 1 month; deposited at least 1 day in the hot environment of food once more than 35 DEG C; Test ending.
This indicator and the method for inspection can be used for the storage life instruction of the FFs such as milk, beverage, bread, cake.
Claims (8)
1. a shelf life storage indicator preparation method, is characterized in that, comprises the following steps:
After being pulverized by raw material, add the ethanolic solution that mass concentration is 5-9%, the weight ratio of described raw material and ethanolic solution is 1:4-6; Concussion crosses leaching filtrate after extracting, and filtrate is sealed in container, obtains shelf life storage indicator; Described raw material is leek or rose; When raw material is leek, described shelf life storage indicator is the short-term indicator that can indicate storage life below 4 DEG C in 6-8 days; When raw material is rose, described shelf life storage indicator is the long term indicator that can indicate storage life below 4 DEG C in 1 month.
2. shelf life storage indicator preparation method according to claim 1, it is characterized in that, the weight ratio of described raw material and ethanolic solution is 1:5.
3. shelf life storage indicator preparation method according to claim 1, is characterized in that, adopts stirring machine during pulverizing; Whirlpool concussion is adopted to extract when concussion is extracted at least 2 minutes; The miillpore filter of less than 0.22 μm is adopted during filtration.
4. shelf life storage indicator preparation method according to claim 1, it is characterized in that, the material of described container is transparent material.
5. shelf life storage indicator preparation method according to claim 4, it is characterized in that, the material of described container is transparent plastic or transparent glass material.
6. the shelf life storage indicator obtained by preparation method described in any one of claim 1 to 5.
7. shelf life storage indicator described in claim 6 is used as the purposes of instruction shelf life storage.
8. a shelf life storage method of inspection, is characterized in that, comprises the following steps:
The first step, at food production date, prepare shelf life storage indicator according to preparation method described in any one of claim 1 to 5, and the airtight container that shelf life storage indicator is housed together is transported with corresponding food, deposit and sells; Wherein, when shelf life storage be less than 4 DEG C in 6-8 days time then prepare short-term indicator, when shelf life storage be less than 4 DEG C in 1 month time then prepare long term indicator;
Second step, condition adjudgement food preservation state according to shelf life storage indicator:
When adopting short-term indicator, under static condition, if indicator is suspension green dispersion liquid, food does not cross storage life; If indicator is in the state of green precipitate and liquid layered, then judge according to the food production date: if now apart from the food production date more than 6-8 days; food cross storage life, if now apart from the food production date more than 6-8 days; deposited at least 3 hours in the hot environment of food once more than 35 DEG C;
When adopting long term indicator, if indicator color is rose-colored, then food does not cross storage life; If indicator color is crocus or Chinese red, then judge according to the food production date: if now apart from the food production date more than 1 month; food cross storage life, if now apart from the food production date more than 1 month; deposited at least 1 day in the hot environment of food once more than 35 DEG C;
Test ending.
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| CN107101998A (en) * | 2015-10-01 | 2017-08-29 | 钱秀英 | Biological color development agent for judging the time |
| CN105295833B (en) * | 2015-10-01 | 2017-05-31 | 孙岩 | Manufacture method for judging the biological color development agent of time |
| CN105255476B (en) * | 2015-10-01 | 2017-10-13 | 申俊 | Based on biological color development technology to serve the storage tank of Internet of Things |
| CN109521010A (en) * | 2018-11-30 | 2019-03-26 | 乐而美(成都)生物技术有限公司 | A kind of food or cosmetics from deterioration discrimination method |
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| EP1809995B1 (en) * | 2004-11-08 | 2018-04-04 | Freshpoint Holdings SA | Time-temperature indicating device |
| CN102336996B (en) * | 2010-06-22 | 2013-04-03 | 四川大学 | Time-temperature color-changing indicator and application and using method thereof |
| CN103725103A (en) * | 2013-06-19 | 2014-04-16 | 王斌 | Time-temperature indicator oil |
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