CN103728296A - Method for quickly detecting quality of black rice - Google Patents
Method for quickly detecting quality of black rice Download PDFInfo
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- CN103728296A CN103728296A CN201310754678.4A CN201310754678A CN103728296A CN 103728296 A CN103728296 A CN 103728296A CN 201310754678 A CN201310754678 A CN 201310754678A CN 103728296 A CN103728296 A CN 103728296A
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Abstract
The invention provides a method for quickly detecting the quality of black rice. The method comprises the following steps: firstly, sealing an acid solution (used as a detection reagent A) with Ph value of 2-5 for later use, or sealing an alkaline solution (used as a detection reagent B) with Ph value of 9-12 for later use; then, placing black rice samples into a small vessel; adding the prepared detection reagent A or detection reagent B into the small vessel to submerge the black rice; and finally, observing the color changing condition of the detection reagent and distinguishing. The method utilizes the characteristics that anthocyanin contained in the black rice becomes red when meeting the acid solution and the anthocyanin becomes blue when meeting the alkaline solution; according to the method, the acid solution and the alkaline solution are used to identify the quality of the black rice; the operation method is simple, the dosage of the detection reagent is less, the identifying speed is high, the result can be obtained within one minute and is accurate, and the method is really simple, quick and accurate.
Description
Technical field
The present invention relates to black rice detection technique field, be specifically related to a kind of method of fast detecting black rice quality.
Background technology
Black rice is indispensable grain during people live, and has very high nutritive value, but commercially available black rice alternates betwwen good and bad, and people are difficult to distinguish with eyes.In real life, differentiate that black rice quality adopts following method conventionally: the one, see gloss, normal black rice epidermal area band is glossy, and black rice inferior is lackluster; The 2nd, see epidermis, normal black rice, under scratching with hand is the thing of sheet, if powdery is black rice inferior; The 3rd, see a meter heart, the rice heart of normal black rice is white, and the rice heart of general rice is transparent, there is no color, and the black rice of dying with rice, although appearance is more even, the color of dyestuff can be penetrated into meter Xin Li and go; The 4th, see puffed wheat water, the puffed wheat water of normal black rice is aubergine, is also aubergine or partially near red after dilution, if the water bubbling out, as prepared Chinese ink, after dilution or black, is false black rice.Above-mentioned four kinds of methods do not have concrete criterion, cannot make effective judgement to black rice, and people's observation capacity of eyes difference is very large in addition, has a lot of uncertain factors while specifically differentiating, are therefore necessary to improve.
Summary of the invention
The technical matters that the present invention solves: a kind of method of fast detecting black rice quality is provided, and utilizing acid solution or alkaline solution to make detection reagent can fast detecting go out black rice quality, convenient and swift, has higher practical value.
The technical solution used in the present invention: the method for fast detecting black rice quality, comprises following step:
Step 1, the acid solution that is 2-5 by Ph value is standby as detecting reagent A sealing; Or the alkaline solution that is 9-12 by Ph value is standby as detecting reagent B sealing;
Step 2, gets black rice sample and is placed in small container;
Step 3, the detection reagent A that step 1 is prepared or detect reagent B and add in small container and by black rice sample and flood;
Step 4, observes the change color situation that detects reagent, can make differentiation:
One, if adopt, detect reagent A:
1) detect reagent and present claret color, black rice sample is high-quality black rice;
2) detect reagent and present black, black rice sample is dyeing black rice;
3) detect reagent and present simple redness, black rice sample is inferior black rice;
4) detect reagent nondiscolouring, black rice sample is black rice inferior;
Two, if adopt reagent B:
1) detect reagent and present blueness, black rice sample is high-quality black rice;
2) detect reagent and present black, black rice sample is dyeing black rice;
3) detect reagent and present simple blueness, black rice sample is inferior black rice;
4) detect reagent nondiscolouring, black rice sample is black rice inferior.
Above-mentioned steps one, described acid solution is hydrochloric acid solution, it is 2-5 that concentrated hydrochloric acid and water are mixed to get to the Ph value that detects reagent A and make to detect reagent A; Described alkaline solution is sodium hydroxide solution, and it is 9-12 that NaOH and water are mixed to get to the Ph value that detects reagent B and make to detect reagent B.
Above-mentioned steps two, gets black rice sample 5g and is placed in small container.
Above-mentioned steps three, adopts and detects reagent A, gets 2ml-3ml detection reagent and adds in small container; Or adopt detection reagent B, get 3ml-4ml detection reagent and add in small container.
If black rice sample, for the good and bad black rice mixing, is arranged grain of black rice sample, each rice respectively adds one and detects reagent, then observes the change color situation of detection reagent and can make differentiation.
The present invention compared with prior art utilizes contained material anthocyanidin chance acid in black rice to redden, meet alkali and turn blue characteristic, utilize two kinds, watery hydrochloric acid or NaOH to detect reagent and carry out the evaluation of black rice quality, method of operating is simple, only need add in black rice sample detecting reagent, everybody all can operate, and it is few to detect reagent dosage, and evaluation speed is fast, in one minute, will go out result, accurate zero defect, real is simple and quick accurate.
Embodiment
Embodiments of the invention are described below.
Embodiment mono-: the method for fast detecting black rice quality:
1, concentrated hydrochloric acid and water are mixed to get to detect reagent A sealing standby, and the pH value that makes to detect reagent A is 2;
2, from grain sack, arbitrarily get tens black rice samples and be placed in small container;
3, the 3ml detection reagent A preparing is added in small container and by black rice sample and flooded;
4, observe the change color situation that detects reagent A, can make differentiation:
1) detect reagent and present claret color, black rice sample is high-quality black rice;
2) detect reagent and present black, black rice sample is dyeing black rice;
3) detect reagent and present simple redness, black rice sample is inferior black rice;
4) detect reagent nondiscolouring, black rice sample is black rice inferior;
If black rice sample is the good and bad black rice mixing, grain of black rice sample is arranged, each rice respectively adds one and detects reagent A, then observes the change color situation that detects reagent A and can make differentiation, and discrimination standard is referring to 1 in above-mentioned steps 4), 2), 3), 4).
Embodiment bis-: the method for fast detecting black rice quality:
1, oxalic acid and water are mixed to get to detect reagent A sealing standby, and the pH value that makes to detect reagent A is 5;
2, from grain sack, arbitrarily get tens black rice samples and be placed in small container;
3, the 2ml detection reagent A preparing is added in small container and by black rice sample and flooded;
4, observe the change color situation that detects reagent A, can make differentiation:
1) detect reagent and present claret color, black rice sample is high-quality black rice;
2) detect reagent and present black, black rice sample is dyeing black rice;
3) detect reagent and present simple redness, black rice sample is inferior black rice;
4) detect reagent nondiscolouring, black rice sample is black rice inferior;
If black rice sample is the good and bad black rice mixing, grain of black rice sample is arranged, each rice respectively adds one and detects reagent A, then observes the change color situation that detects reagent A and can make differentiation, and discrimination standard is referring to 1 in above-mentioned steps 4), 2), 3), 4).
Embodiment tri-: the method for fast detecting black rice quality:
1, NaOH and water are mixed to get to detect reagent A sealing standby, and the pH value that makes to detect reagent B is 12;
2, from grain sack, arbitrarily get tens black rice samples and be placed in small container;
3, the 4ml detection reagent A preparing is added in small container and by black rice sample and flooded;
1) detect reagent and present blueness, black rice sample is high-quality black rice;
2) detecting reagent and present black, is black rice sample dyeing black rice;
3) detect reagent and present simple blueness, black rice sample is inferior black rice;
4) detect reagent nondiscolouring, black rice sample is black rice inferior.
If black rice sample is the good and bad black rice mixing, grain of black rice sample is arranged, each rice respectively adds one and detects reagent, then observes the change color situation that detects reagent and can make differentiation, and discrimination standard is referring to 1 in above-mentioned steps 4), 2), 3), 4).
Embodiment tetra-: the method for fast detecting black rice quality:
1, sodium carbonate and water are mixed to get to detect reagent A sealing standby, and the pH value that makes to detect reagent B is 9;
2, from grain sack, arbitrarily get tens black rice samples and be placed in small container;
3, the 3ml detection reagent A preparing is added in small container and by black rice sample and flooded;
1) detect reagent and present blueness, black rice sample is high-quality black rice;
2) detect reagent and present black, black rice sample is dyeing black rice;
3) detect reagent and present simple blueness, black rice sample is inferior black rice;
4) detect reagent nondiscolouring, black rice sample is black rice inferior.
If black rice sample is the good and bad black rice mixing, grain of black rice sample is arranged, each rice respectively adds one and detects reagent, then observes the change color situation that detects reagent and can make differentiation, and discrimination standard is referring to 1 in above-mentioned steps 4), 2), 3), 4).
Above-described embodiment, is preferred embodiment of the present invention, is not used for limiting the scope of the present invention, and the equivalence of being done with content described in the claims in the present invention therefore all changes, within all should being included in the claims in the present invention scope.
Claims (5)
1. the method for fast detecting black rice quality, is characterized in that comprising following step:
Step 1, the acid solution that is 2-5 by Ph value is standby as detecting reagent A sealing; Or the alkaline solution that is 9-12 by Ph value is standby as detecting reagent B sealing;
Step 2, gets black rice sample and is placed in small container;
Step 3, the detection reagent A that step 1 is prepared or detect reagent B and add in small container and by black rice sample and flood;
Step 4, observes the change color situation that detects reagent, can make differentiation:
One, if adopt, detect reagent A:
1) detect reagent and present claret color, black rice sample is high-quality black rice;
2) detect reagent and present black, black rice sample is dyeing black rice;
3) detect reagent and present simple redness, black rice sample is inferior black rice;
4) detect reagent nondiscolouring, black rice sample is black rice inferior;
Two, if adopt reagent B:
1) detect reagent and present blueness, black rice sample is high-quality black rice;
2) detect reagent and present black, black rice sample is dyeing black rice;
3) detect reagent and present simple blueness, black rice sample is inferior black rice;
4) detect reagent nondiscolouring, black rice sample is black rice inferior.
2. the method for fast detecting black rice quality according to claim 1, is characterized in that: above-mentioned steps one, and described acid solution is hydrochloric acid solution, it is 2-5 that concentrated hydrochloric acid and water are mixed to get to the Ph value that detects reagent A and make to detect reagent A; Described alkaline solution is sodium hydroxide solution, and it is 9-12 that NaOH and water are mixed to get to the Ph value that detects reagent B and make to detect reagent B.
3. the method for fast detecting black rice quality according to claim 1, is characterized in that: above-mentioned steps two, and get black rice sample 5g and be placed in small container.
4. according to the method for the fast detecting black rice quality described in claim 1 or 2 or 3, it is characterized in that, above-mentioned steps three, adopts and detects reagent A, gets 2ml-3ml detection reagent and adds in small container; Or adopt detection reagent B, get 3ml-4ml detection reagent and add in small container.
5. the method for fast detecting black rice quality according to claim 4, it is characterized in that, if black rice sample is for the good and bad black rice mixing, grain of black rice sample is arranged, each rice respectively adds one and detects reagent, then observes the change color situation of detection reagent and can make differentiation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310754678.4A CN103728296A (en) | 2013-12-31 | 2013-12-31 | Method for quickly detecting quality of black rice |
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| CN201310754678.4A CN103728296A (en) | 2013-12-31 | 2013-12-31 | Method for quickly detecting quality of black rice |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104026457A (en) * | 2014-06-19 | 2014-09-10 | 南京麦思德餐饮管理有限公司 | Purely-natural color-changing food |
| CN105203621A (en) * | 2015-10-10 | 2015-12-30 | 山西大学 | Application of nitrogen-doped carbon point to analysis of micro-molecular environmental pollutants |
| CN105973882A (en) * | 2016-05-12 | 2016-09-28 | 山西大学 | Method for rapidly detecting anthocyanin pigments in products |
| CN107779354A (en) * | 2017-12-01 | 2018-03-09 | 左中国 | A kind of processing technology of black rice rice wine |
-
2013
- 2013-12-31 CN CN201310754678.4A patent/CN103728296A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104026457A (en) * | 2014-06-19 | 2014-09-10 | 南京麦思德餐饮管理有限公司 | Purely-natural color-changing food |
| CN105203621A (en) * | 2015-10-10 | 2015-12-30 | 山西大学 | Application of nitrogen-doped carbon point to analysis of micro-molecular environmental pollutants |
| CN105973882A (en) * | 2016-05-12 | 2016-09-28 | 山西大学 | Method for rapidly detecting anthocyanin pigments in products |
| CN107779354A (en) * | 2017-12-01 | 2018-03-09 | 左中国 | A kind of processing technology of black rice rice wine |
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