CN115389565A - Water-injected chicken judgment and detection method - Google Patents
Water-injected chicken judgment and detection method Download PDFInfo
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- 241000287828 Gallus gallus Species 0.000 title claims abstract description 168
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 238000001514 detection method Methods 0.000 title claims abstract description 66
- 238000002347 injection Methods 0.000 claims abstract description 38
- 239000007924 injection Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000000691 measurement method Methods 0.000 claims abstract description 15
- 206010034203 Pectus Carinatum Diseases 0.000 claims description 33
- 210000003205 muscle Anatomy 0.000 claims description 33
- 235000013372 meat Nutrition 0.000 claims description 30
- 239000008213 purified water Substances 0.000 claims description 12
- 230000007613 environmental effect Effects 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 6
- 235000013622 meat product Nutrition 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000011160 research Methods 0.000 claims description 6
- 210000002435 tendon Anatomy 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract 1
- 235000013330 chicken meat Nutrition 0.000 description 126
- 238000003307 slaughter Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229930003347 Atropine Natural products 0.000 description 1
- RKUNBYITZUJHSG-UHFFFAOYSA-N Hyosciamin-hydrochlorid Natural products CN1C(C2)CCC1CC2OC(=O)C(CO)C1=CC=CC=C1 RKUNBYITZUJHSG-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- KDKJYYNXYAZPIK-UHFFFAOYSA-J aluminum potassium disulfate hydrate Chemical compound O.[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KDKJYYNXYAZPIK-UHFFFAOYSA-J 0.000 description 1
- RKUNBYITZUJHSG-SPUOUPEWSA-N atropine Chemical compound O([C@H]1C[C@H]2CC[C@@H](C1)N2C)C(=O)C(CO)C1=CC=CC=C1 RKUNBYITZUJHSG-SPUOUPEWSA-N 0.000 description 1
- 229960000396 atropine Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- STJMRWALKKWQGH-UHFFFAOYSA-N clenbuterol Chemical compound CC(C)(C)NCC(O)C1=CC(Cl)=C(N)C(Cl)=C1 STJMRWALKKWQGH-UHFFFAOYSA-N 0.000 description 1
- 229960001117 clenbuterol Drugs 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010291 electrical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
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Abstract
The invention discloses a water-injected chicken judgment and detection method which comprises the following specific steps of obtaining a water-non-injected chicken sample, and pretreating the water-non-injected chicken sample; detecting a non-water-injected chicken sample by an electrical measurement method; and obtaining the moisture content interval value of the chicken without water injection; and acquiring water-injected chicken samples, pretreating the water-injected chicken samples, and grouping the water-injected chicken samples. According to the water-injected chicken judging and detecting method, the simple, convenient, accurate and quick measurement of the water content of chicken is realized through an alternating current impedance method, a plurality of groups of water-injected chicken samples are arranged, the error generated when the water content of the water-injected chicken is detected by the environment temperature is reduced through the detection of the plurality of groups of samples at different environment temperatures, and a corresponding compensation circuit is designed.
Description
Technical Field
The invention relates to the technical field related to food detection, in particular to a water-injected chicken judgment and detection method.
Background
"Water-infused meat" is a poor quality product that has become common in recent years. Some vendors or owners can increase the chickens' weight and gain more privacy by injecting water into the meat after slaughtering, and the water injection can increase the net weight by 15% -22%. Many meat experts point out that "water-infused meat" is no less harmful than "clenbuterol". Atropine, alum water, brine, industrial pigment, preservative and the like may be added into the water-injected meat. The water injection reduces the quality of the chicken, is easy to cause pathogenic microorganism pollution and has great potential harm to human bodies.
At present, no professional detection is carried out on water-injected chickens in the market, and the detection methods adopted by the existing meat detection mechanism for the water-injected chickens can be divided into two methods, namely a drying and weighing method and an electrical measurement method, wherein the electrical measurement method can be divided into the following steps: the direct current resistance alternating current capacitance method, the stoving weighing method operation is more complicated, and take time and expense a little, and only use in the laboratory, can not be used for the witnessed inspections, and the limitation is great, and the required instrument of current electricity measuring method is not convenient for the scene to carry, and electricity measuring method when detecting, because of stability is relatively poor, can lead to the precision lower, and detected signal easily receives the interference, easily causes repeatability error big, can not satisfy the requirement of detecting chicken moisture fast, accurately.
Aiming at the problems, a water-injected chicken judgment and detection method is provided.
Disclosure of Invention
The invention aims to provide a water-injected chicken judgment and detection method, and aims to solve the problems that the existing detection method provided by the background technology is not comprehensive enough, and the detection accuracy cannot be ensured while the rapid detection is ensured.
In order to achieve the purpose, the invention provides the following technical scheme: a water-injected chicken judgment and detection method comprises the following specific steps:
1) Obtaining a non-water-injection chicken sample, and pretreating the non-water-injection chicken sample;
2) And detecting the chicken sample without water injection by an electrical measurement method, and obtaining the moisture content interval value of the chicken without water injection.
3) And acquiring water-injected chicken samples, pretreating the water-injected chicken samples, and grouping the water-injected chicken samples.
Preferentially, the chicken samples without water injection in the step 1) are chicken breast muscle samples, the chicken samples to be detected in the step 3) are 4 groups, and each group contains 3-5 parts of samples.
Preferentially, pretreatment is needed before the detection of the chicken sample in the step 1) and the step 3), and the treatment method comprises the following steps:
a) Removing tendons, membranes and fat from the surface of the chicken breast muscle sample;
b) And (3) placing the treated chicken breast muscle into a meat grinder, and grinding the chicken breast muscle through a high-speed gear until no granular meat paste exists.
Preferably, the chicken samples without water injection in the step 1) are chicken breast muscles taken as samples after live chickens are slaughtered, and the chicken samples without water injection are 3-5 groups.
Preferably, the electrical measurement method in the step 2) is specifically an alternating current impedance method: the alternating current impedance detection system comprises a signal generator, a moisture sensor, an adjusting and amplifying circuit, a filter circuit and a single chip microcomputer system;
the moisture sensor adopts a needle-shaped multi-electrode structure, a plurality of pairs of electrodes sample simultaneously, and the maximum value and the minimum value are removed and the average value is taken through a single chip microcomputer system;
through the research on the conductive property of the chicken product in the radio frequency range, the moisture impedance property of the chicken is in a logarithmic relation: z is a linear or branched member x ＝a+log b m ；
Z x Impedance of chicken, M is water content of meat product, a and b are constants of 0<b<1；
M = b is obtained from the above formula zx-a 。
Preferably, the moisture content M of the meat to be measured is exponential to the meat impedance Zx, and when the applied excitation signal is 100kHz, the ac impedance characteristic curve can be linearly approximated to be a straight line.
Preferentially, the detection by the ac impedance method is affected by the ambient temperature, and a corresponding compensation circuit needs to be designed to ensure the accuracy of the detection structure:
the experiment shows that the impedance is smaller when the temperature is higher, and the influence of the temperature on the impedance is approximately linear, the temperature of the detection environment is detected by adding a temperature acquisition chip in a detection system, and the temperature is compensated by a singlechip;
the system adopts a DS1620 chip as a temperature sensor chip, and the temperature measuring range is-55 ℃ to +125 ℃.
Preferably, purified water is injected into the four groups in the step 3) in a ratio of 0 part for the group a and 2-8 parts for the groups b, c and d.
Preferentially, in the step 3), the water content of the chicken samples to be detected in the group a is 70-74%, and the water content of the chicken samples in the groups b, c and d is 76-84% after purified water is injected into the groups b, c and d.
Compared with the prior art, the invention has the beneficial effects that: according to the water-injected chicken judging and detecting method, the water content of chicken is simply, accurately and quickly measured through an alternating current impedance method, a plurality of groups of water-injected chicken samples are arranged, and errors generated when the water content of the water-injected chicken is detected by the environment temperature are reduced through detecting the plurality of groups of samples at different environment temperatures and designing corresponding compensating circuits, so that the accuracy of the detecting method is improved;
1. through a plurality of groups of preprocessed chicken samples, the situation of different water injection chicken which may appear on the market is simulated, different water injection amounts are compared, the detection is carried out through the plurality of groups of samples at different environmental temperatures, the influence of the environmental temperature on the test result is obtained to be approximately linear according to the test, and a corresponding compensation circuit is designed, so that the accuracy of the chicken water injection judgment of the method is improved, and the reliability of the chicken water detection of the method is ensured.
2. The conduction current is determined by the impedance of chicken when the alternating current impedance method is used for detection, the water content in the chicken can be calculated after data processing, the water-injected chicken with different water contents is detected and compared, the specific conduction current of the water-injected chicken sample with different water contents can be calculated, and the method has better accuracy and repeatability compared with the existing electrical method.
Drawings
FIG. 1 is a system diagram of an AC impedance detection method;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides the following technical solutions:
example 1
A water-injected chicken judgment and detection method comprises the following specific steps:
1) Purchasing 15 chickens from the market, immediately sampling after slaughtering, reserving 3 parts of non-water-injected chicken as a detection reference, and pretreating the non-water-injected chicken sample; the water-flooding-free chicken samples are chicken breast muscle samples, the water-flooding-free chicken samples in the step 1) are chicken breast muscles taken as samples after live chickens are slaughtered, the water-flooding-free chicken samples comprise 3 groups, and the water content of the water-flooding-free chicken samples is 70% -74%.
2) Detecting the chicken sample without water injection by an electrical measurement method, and obtaining a moisture content interval value of the chicken without water injection; the electrical measurement method in the step 2) is specifically an alternating current impedance method: the alternating current impedance detection system comprises a signal generator, a moisture sensor, an adjusting and amplifying circuit, a filter circuit and a single chip microcomputer system;
the moisture sensor adopts a needle-shaped multi-electrode structure, a plurality of pairs of electrodes sample simultaneously, and the maximum value and the minimum value are removed and the average value is taken through a single chip microcomputer system;
through the research on the conductive property of the chicken product in the radio frequency range, the moisture impedance property of the chicken is in a logarithmic relation: z x ＝a+log b m ；
Z x Impedance of chicken, M is moisture content of meat product, a and b are constant and 0<b<1；
M = b is obtained from the above formula zx-a ；
The moisture content M of the meat to be detected and the meat impedance Zx are in an exponential relationship, when an applied excitation signal is 100kHz, an alternating current impedance characteristic curve can approach linearly and is approximate to a straight line, and when the alternating current impedance method is used for detection, a corresponding compensation circuit needs to be designed to ensure the accuracy of a detection structure under the influence of the ambient temperature:
detecting a plurality of groups of different water-injected chicken samples prepared in the step 3) at different environmental temperatures to obtain that the impedance is smaller when the temperature is higher, and the influence of the temperature on the impedance is approximately linear;
the system adopts a DS1620 chip as a temperature sensor chip, and the temperature measuring range is-55 ℃ to +125 ℃.
3) Obtaining water-injected chicken samples, pretreating the water-injected chicken samples, and grouping the water-injected chicken samples, wherein the chicken to be detected in the step 3): the chicken samples to be detected are 4 groups, each group comprises 3 samples, purified water is respectively injected into the four groups of samples, the proportion of the groups a is 0%, and the proportion of the groups b, c and d is 25% -80%; the specific water injection proportion is 0 part of a component, 3 parts of b component, 4 parts of c component and 7 parts of d component,
the chicken sample in the step 1) and the step 3) needs to be pretreated before detection, and the treatment method comprises the following steps:
a) Removing tendons, membranes and fat from the surface of the chicken breast muscle sample;
3) b) placing the treated chicken breast muscle into a meat grinder, and grinding the chicken breast muscle through a high-speed gear until no granular meat paste exists;
in the step 3), the water content of the chicken samples to be detected in the group a is 70-74%, and the water content of the chicken in the group 4 of the samples to be detected after purified water is injected into the group b, the group c and the group d is 76-84%;
the detection is carried out by using an alternating current impedance detection method, the predicted correct number is 12 samples, and the predicted correct rate is 100%.
Example 2
A water-injected chicken judgment and detection method comprises the following specific steps:
1) Purchasing 23 chickens from the market, immediately sampling after slaughtering, reserving 3 parts of non-water-injected chicken as a detection reference, and pretreating the non-water-injected chicken sample; the chicken samples without water injection are chicken breast muscle samples, the chicken breast muscle samples in the step 1) are obtained after live chickens are slaughtered, the chicken breast muscle samples without water injection are 3 groups, and the water content of the chicken samples without water injection is 70-74%.
2) Detecting the chicken sample without water injection by an electrical measurement method, and obtaining the moisture content interval value of the chicken without water injection; the electrical measurement method in the step 2) is specifically an alternating current impedance method: the alternating current impedance detection system comprises a signal generator, a moisture sensor, an adjusting and amplifying circuit, a filter circuit and a single chip microcomputer system;
the moisture sensor adopts a needle-shaped multi-electrode structure, a plurality of pairs of electrodes sample simultaneously, and the maximum value and the minimum value are removed and the average value is taken through a single chip microcomputer system;
through the research on the conductive property of the chicken product in the radio frequency range, the moisture impedance property of the chicken is in a logarithmic relation: z x ＝a+log b m ；
Z x Impedance of chicken, M is water content of meat product, a and b are constants of 0<b<1；
M = b is obtained from the above formula zx-a ；
The moisture content M of the meat to be detected and the meat impedance Zx are in an exponential relationship, when an applied excitation signal is 100kHz, an alternating current impedance characteristic curve can approach linearly and is approximate to a straight line, and when the alternating current impedance method is used for detection, a corresponding compensation circuit needs to be designed to ensure the accuracy of a detection structure under the influence of the ambient temperature:
detecting a plurality of groups of different water-injected chicken samples prepared in the step 3) at different environmental temperatures to obtain that the impedance is smaller when the temperature is higher, and the influence of the temperature on the impedance is approximately linear;
the system adopts a DS1620 chip as a temperature sensor chip, and the temperature measuring range is-55 ℃ to +125 ℃.
3) Acquiring a water-injected chicken sample, pretreating the water-injected chicken sample, and grouping the water-injected chicken sample, wherein the chicken to be detected in the step 3): the chicken samples to be detected are 4 groups, each group comprises 5 samples, purified water is respectively injected into the four groups of samples, the proportion of the groups a is 0%, and the proportion of the groups b, c and d is 25% -80%; the specific water injection proportion is 0 part of the group a, 2 parts of the group b, 5 parts of the group c and 6 parts of the group d;
the chicken sample in the step 1) and the step 3) needs to be pretreated before detection, and the treatment method comprises the following steps:
a) Removing tendons, membranes and fat from the surface of the chicken breast muscle sample;
4) b) placing the treated chicken breast muscle into a meat grinder, and grinding the chicken breast muscle through a high-speed gear until no granular meat paste exists;
in the step 3), the water content of the chicken samples to be detected in the group a is 70-74%, and the water content of the chicken samples in the group b, the group c and the group d is 76-84% after purified water is injected into the group b, the group c and the group d;
the detection is carried out by using an alternating current impedance detection method, the predicted correct number is 20 samples, and the predicted correct rate is 100%.
Example 3
A water-injected chicken judgment and detection method comprises the following specific steps:
1) Purchasing 29 chickens from the market, immediately sampling after slaughtering, reserving 4 parts of non-water-injected chicken as a detection standard, and pretreating the non-water-injected chicken sample; the chicken samples without water injection are chicken breast muscle samples, the chicken breast muscle samples in the step 1) are obtained after live chickens are slaughtered, the chicken breast muscle samples without water injection are 3 groups, and the water content of the chicken samples without water injection is 70-74%.
2) Detecting the chicken sample without water injection by an electrical measurement method, and obtaining a moisture content interval value of the chicken without water injection; the electrical measurement method in the step 2) is specifically an alternating current impedance method: the alternating current impedance detection system comprises a signal generator, a moisture sensor, an adjusting and amplifying circuit, a filter circuit and a single chip microcomputer system;
the moisture sensor adopts a needle-shaped multi-electrode structure, a plurality of pairs of electrodes sample simultaneously, and the maximum value and the minimum value are removed and the average value is taken through a single chip microcomputer system;
through the research on the conductive property of the chicken product in the radio frequency range, the moisture impedance property of the chicken is in a logarithmic relation: z is a linear or branched member x ＝a+log b m ；
Z x Impedance of chicken, M is water content of meat product, a and b are constants of 0<b<1；
M = b is obtained from the above formula zx-a ；
The moisture content M of the meat to be detected and the meat impedance Zx are in an exponential relationship, when an applied excitation signal is 100kHz, an alternating current impedance characteristic curve can approach linearly and is approximate to a straight line, and when the alternating current impedance method is used for detection, a corresponding compensation circuit needs to be designed to ensure the accuracy of a detection structure under the influence of the ambient temperature:
detecting a plurality of groups of different water-injected chicken samples prepared in the step 3) at different environmental temperatures to obtain that the impedance is smaller when the temperature is higher, and the influence of the temperature on the impedance is approximately linear;
the system adopts a DS1620 chip as a temperature sensor chip, and the temperature measuring range is-55 ℃ to +125 ℃.
3) Obtaining water-injected chicken samples, pretreating the water-injected chicken samples, and grouping the water-injected chicken samples, wherein the chicken to be detected in the step 3): the chicken samples to be detected are 4 groups, each group comprises 5 samples, purified water is respectively injected into the four groups of samples, the proportion of the groups a is 0%, and the proportion of the groups b, c and d is 25% -80%; the specific water injection proportion is 0 part of a component, 2 parts of b component, 5 parts of c component and 6 parts of d component,
the chicken sample is required to be pretreated before being detected in the steps 1) and 3), and the treatment method comprises the following steps:
a) Removing tendon, membrane and fat on the surface of the chicken breast muscle sample;
5) b) placing the treated chicken breast muscle into a meat grinder, and grinding the chicken breast muscle through a high-speed gear until no granular meat paste exists;
in the step 3), the water content of the chicken samples to be detected in the group a is 70-74%, and the water content of the chicken samples in the group b, the group c and the group d is 76-84% after purified water is injected into the group b, the group c and the group d;
the detection is carried out by using an alternating current impedance detection method, the correct number of the samples is predicted to be 24, and the correct prediction rate is 96%.
Example 4
A water-injected chicken judgment and detection method comprises the following specific steps:
1) Purchasing 25 chickens from the market, immediately sampling after slaughtering, reserving 5 parts of non-water-injected chicken as a detection reference, and pretreating the non-water-injected chicken sample; the chicken samples without water injection are chicken breast muscle samples, the chicken breast muscle samples in the step 1) are obtained after live chickens are slaughtered, the chicken breast muscle samples without water injection are 3 groups, and the water content of the chicken samples without water injection is 70-74%.
2) Detecting the chicken sample without water injection by an electrical measurement method, and obtaining the moisture content interval value of the chicken without water injection; the electrical measurement method in the step 2) is specifically an alternating current impedance method: the alternating current impedance detection system comprises a signal generator, a moisture sensor, an adjusting and amplifying circuit, a filter circuit and a single chip microcomputer system;
the moisture sensor adopts a needle-shaped multi-electrode structure, a plurality of pairs of electrodes sample simultaneously, and the maximum value and the minimum value are removed and the average value is taken through a single chip microcomputer system;
through the research on the conductive property of the chicken product in the radio frequency range, the moisture impedance property of the chicken is in a logarithmic relation: z x ＝a+log b m ；
Z x Impedance of chicken, M is moisture content of meat product, a and b are constant and 0<b<1；
M = b is obtained from the above formula zx-a ；
The moisture content M of the meat to be detected and the meat impedance Zx are in an exponential relationship, when an applied excitation signal is 100kHz, an alternating current impedance characteristic curve can approach linearly and is approximate to a straight line, and when the alternating current impedance method is used for detection, a corresponding compensation circuit needs to be designed to ensure the accuracy of a detection structure under the influence of the ambient temperature:
detecting a plurality of groups of different water-injected chicken samples prepared in the step 3) at different environmental temperatures to obtain that the impedance is smaller when the temperature is higher, and the influence of the temperature on the impedance is approximately linear;
the system adopts a DS1620 chip as a temperature sensor chip, and the temperature measuring range is-55 ℃ to +125 ℃.
3) Obtaining water-injected chicken samples, pretreating the water-injected chicken samples, and grouping the water-injected chicken samples, wherein the chicken to be detected in the step 3): the chicken samples to be detected are 4 groups, each group comprises 4 samples, purified water is respectively injected into the four groups of samples, the proportion of the group a is 0%, and the proportion of the group b, the group c and the group d is 25% -80%; the concrete water injection proportion is 0 part of a component, 4 parts of b component, 5 parts of c component and 8 parts of d component,
the chicken sample is required to be pretreated before being detected in the steps 1) and 3), and the treatment method comprises the following steps:
a) Removing tendon, membrane and fat on the surface of the chicken breast muscle sample;
6) b) placing the treated chicken breast muscle into a meat grinder, and grinding the chicken breast muscle through a high-speed gear until no granular meat paste exists;
in the step 3), the water content of the chicken samples to be detected in the group a is 70-74%, and the water content of the chicken in the group 4 of the samples to be detected after purified water is injected into the group b, the group c and the group d is 76-84%;
the detection is carried out by using an alternating current impedance detection method, the predicted correct number is 20 samples, and the predicted correct rate is 100%.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The water-injected chicken judging and detecting method is characterized by comprising the following specific steps of:
1) Obtaining a non-water-injection chicken sample, and pretreating the non-water-injection chicken sample;
2) Detecting the chicken sample without water injection by an electrical measurement method, and obtaining a moisture content interval value of the chicken without water injection;
3) And acquiring water-injected chicken samples, pretreating the water-injected chicken samples, and grouping the water-injected chicken samples.
2. The water-filled chicken judgment and detection method according to claim 1, characterized in that: the chicken samples to be detected in the step 1) are chicken breast muscle samples, the chicken samples to be detected in the step 3) are 4 groups, and each group contains 3-5 parts of samples.
3. The water-filled chicken judgment and detection method according to claim 1, characterized in that: the chicken sample is required to be pretreated before being detected in the steps 1) and 3), and the treatment method comprises the following steps:
a) Removing tendon, membrane and fat on the surface of the chicken breast muscle sample;
b) And placing the treated chicken breast muscle into a meat grinder, and grinding the chicken breast muscle through a high-speed gear until no granular meat paste exists.
4. The water-filled chicken judgment and detection method according to claim 1, characterized in that: the chicken breast muscle of the slaughtered live chicken is taken as a sample of the non-waterflooded chicken sample in the step 1), the non-waterflooded chicken sample is 3-5 groups, and the water content of the non-waterflooded chicken sample is 70% -74%.
5. The water-filled chicken judgment and detection method according to claim 1, characterized in that: the electrical measurement method in the step 2) is specifically an alternating current impedance method: the alternating current impedance detection system comprises a signal generator, a moisture sensor, an adjusting and amplifying circuit, a filter circuit and a single chip microcomputer system;
the moisture sensor adopts a needle-shaped multi-electrode structure, a plurality of pairs of electrodes sample simultaneously, and the maximum value and the minimum value are removed and the average value is taken through a single chip microcomputer system;
through the research on the conductive property of the chicken product in the radio frequency range, the moisture impedance property of the chicken is in a logarithmic relation: z is a linear or branched member x ＝a+log b m ；
Z x Impedance of chicken, M is water content of meat product, a and b are constants of 0<b<1；
M = b is obtained from the above formula zx-a 。
6. The water-filled chicken judgment and detection method according to claim 5, characterized in that: the moisture content M of the detected meat and the meat impedance Zx are in an exponential relation, and when the applied excitation signal is 100kHz, the alternating current impedance characteristic curve can be linearly approximated to be a straight line.
7. The water-filled chicken judgment and detection method according to claim 6, characterized in that: when the alternating current impedance method is used for detection, the influence of the ambient temperature is required, and a corresponding compensation circuit is required to be designed to ensure the accuracy of a detection structure:
detecting a plurality of groups of different water-injected chicken samples prepared in the step 3) at different environmental temperatures to obtain that the impedance is smaller when the temperature is higher, and the influence of the temperature on the impedance is approximately linear;
the system adopts a DS1620 chip as a temperature sensor chip, and the temperature measuring range is-55 ℃ to +125 ℃.
8. The water-filled chicken judgment and detection method according to claim 2, characterized in that: in the step 3), purified water is respectively injected into the four groups in the proportion of 0 part of the group a, and 2-8 parts of the groups b, c and d.
9. The water-filled chicken judgment and detection method according to claim 8, characterized in that: in the step 3), the water content of the chicken samples to be detected in the group a is 70-74%, and the water content of the chicken samples in the group b, the group c and the group d is 76-84% after purified water is injected into the group b, the group c and the group d.
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