CN108896721A - A kind of rapid method for assessment for eating freezing tuna grade raw - Google Patents

A kind of rapid method for assessment for eating freezing tuna grade raw Download PDF

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Publication number
CN108896721A
CN108896721A CN201810726895.5A CN201810726895A CN108896721A CN 108896721 A CN108896721 A CN 108896721A CN 201810726895 A CN201810726895 A CN 201810726895A CN 108896721 A CN108896721 A CN 108896721A
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China
Prior art keywords
tuna
grade
muscle
grades
color
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CN201810726895.5A
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Chinese (zh)
Inventor
朱文嘉
王联珠
姚琳
孟凡勇
郭莹莹
刘淇
江艳华
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Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences
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Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02Food
    • G01N33/12Meat; Fish
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Food Science & Technology (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Medicinal Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Processing Of Meat And Fish (AREA)

Abstract

The present invention relates to a kind of rapid method for assessment for eating freezing tuna grade raw, belong to aquatic food field, cutting between tuna dorsal fin the 3rd Section 6 reciprocal is obtained into tail portion with sharp knife, and carry out fish tail defrosting, in bright and clear environment, fish tail block after defrosting is lain against on clean white enamel tray, tuna is divided into top grade, good grade, regular grade and regular grade according to the degree of shrinkage of tail muscles and muscle color by big cut side up;The present invention is without expensive instrument, easy to operate, solve the problems, such as that instrument detection device is expensive and unworkable, it has been subjected to field experiment and verifies repeatedly, the present invention is more in line with the urgent need of the high-volume freezing tuna examination of current factory and trade market.

Description

A kind of rapid method for assessment for eating freezing tuna grade raw
Technical field
The invention belongs to aquatic food fields, are specifically related to a kind of rapid method for assessment eaten raw and freeze golden rifle grade.
Background technique
Tuna has the characteristics that high protein, low sugar, low fat, low in calories, is the ideal healthy food of people.Due to gold 1~3 times faster than mammal of the oxidation rate of marlin myoglobins, and temperature influence is particularly evident, in order to make tuna exist Keep color, the mouthfeel of its meat constant in long-term storage, need to be immediately placed in after rapidly gutting, bloodletting after capture- 50 DEG C of household freezer carries out fresh-keeping.Freezing tuna enters processing factory, and the price of every kg is from several hundred members to thousands of members etc., price Up to thousand yuan of difference, the ranking of the freezing whole fish of tuna how is carried out, to determine that its quality and price are traded as tuna Critical issue urgently to be solved, and improve the yield and added value of product, reasonable development and the pass using tuna resources Key.Currently, since the industry that this output value surpasses 10,000,000,000 yuan lacks grading evaluation method, lead to not fully demonstrate high-quality excellent Valence principle causes both sides of supply and demand to generate unnecessary trade dispute often.
Index of the Japan using K value as evaluation raw fish freshness at present, but K value can only embody the fresh of product Degree, and the complicated for operation of K value detection, expensive equipment, result stability are poor, and which is difficult to carry out at home.Volatile salts Base nitrogen (TVB-N) is the index for reflecting tuna degree of spoilage, but is not suitable for eating the judgement of tuna grade raw.Currently also have The method that tuna color is determined by image technique finds that its equipment price is high by the understanding to image technique method It is expensive, cumbersome, high to experiment condition requirement, and can not thoroughly evaluating product hierarchy only according to color.The above method, which exists, to be taken Therefore the problem of flesh of fish sample is uneven and destructive sampling effect product two time selling is not suitable for factory and trade market High-volume freezing tuna checks and accepts operation.
Gold is reflected by scientific and rational organoleptic indicator using sensory evaluation method for the quality characteristic of tuna The feature quality and quality requirement of the whole fish of marlin carry out the optimal selection that comprehensive eye exam is grading.The food of sensory evaluation Classification technique has the characteristics that easy to operate, intuitive, has been widely used for the identification of meat products and aquatic products at present.Sensory evaluation Method to freezing the whole fish of tuna supplied materials check and accept, quality price have intuitive, convenience, the advantage of operability.But It is that the freezing whole fish of tuna is difficult to carry out quality evaluation, it is necessary to thaw, observe the situation of the flesh of fish by ocular estimate.And - 50 DEG C of tuna use freezings of freezing, fish body is big, and thawing, time-consuming, easily leads to quality deterioration, and the partial cut flesh of fish is without body of laws The defect of existing whole fish products matter, and influence product two time selling.Based on the above reasons, it is badly in need of a kind of tuna Classified Protection, The original appearance of product and quality can be not only maximally maintained, additionally it is possible to meet the factories such as easy to operate, quick, practical batch Measure the requirement of acceptance inspeciton.
Summary of the invention
It is an object of the invention to solve above-mentioned technical problem, provides and a kind of easy to operate, willing eat freezing raw The assessment method of golden rifle grade.The method is by cutting freezing tuna tail portion, according to the degree of shrinkage and muscle of fish tail muscle Color carries out grade classification, is evaluation raw material fish products matter and price, the effective way for determining following process mode.
The present invention is achieved by the following technical solution:
A kind of rapid method for assessment for eating freezing tuna grade raw will with sharp knife in bright and clear environment Cutting obtains tail portion between tuna dorsal fin the 3rd Section 6 reciprocal, puts fish tail stripping and slicing in order, big section is soaked in downward 3-5 minutes in 30 DEG C of water, until fish block thaws, takes out fish block and lie against in clean white disk, big cut side up dabs table with hand Face to fog disappears, and carries out tail muscles inspection, is divided into tuna according to the degree of shrinkage of tail muscles and muscle color excellent Grade, good grade, regular grade and regular grade;Specific step is as follows:
(1) tuna fish block section is divided into 8 parts, as shown, by 8 pieces of contraction of muscle situations of massage pressing and observing into Row grade classification;
A) when 8 parts have been shunk, contraction of muscle degree grade is A grades;
B) 2 or less shrink weak or when not shrinking in 8 parts, contraction of muscle degree grade is B grades;
C) 4 or less shrink weak or when not shrinking in 8 parts, contraction of muscle degree grade is C grades;
D) 8 parts are shunk weak or when not shrinking, and contraction of muscle degree grade is D grades.
(2) RGB color standard is used, control muscle color carrys out divided rank:
A) muscle color is peony RGB:143, Isosorbide-5-Nitrae 6 is judged as to be A grades;
B) muscle color is cerise RGB:159,8,50, it is judged as B grades;
C) muscle color is light coral RGB:175,59,72, it is judged as C grades;
D) muscle color is kermesinus RGB:129,72,82, it is judged as D grades;
(3) integrated level divides:Integrated level division is carried out according to contraction of muscle rank and muscle color, table 1 should be met Regulation.
1 tuna of table tests tail integrated level table
The beneficial effect of the present invention compared with prior art:
Technical solution of the present invention by cutting freezing tuna tail portion, according to the degree of shrinkage of fish tail muscle and muscle color into The grade classification of the whole fish of row tuna, to determine that raw material fish products matter and price, subsequent processing method and shelf life provide Criterion substantially increases the accuracy and intuitive of tuna classification.
The present invention can both embody the quality of whole fish to freeze tuna tail portion as test object, can be with maximum journey Influence and the partial cut flesh of fish of the reduction defrosting of degree to the appearance and quality of the freezing whole fish of tuna can not embody whole fish products The defect of matter improves the convenience of freezing tuna grade decision process.
The present invention is according to product characteristic, using two indexs of the degree of shrinkage of fish tail muscle and muscle color as grade classification Foundation reduces the error that grade classification is carried out with this index of color.
The present invention is by the way that experimental results demonstrate the optimum condition of defrosting is impregnated 3-5 minutes in 30 DEG C of water, water temperature over-high Or too low it will affect its ranking.
It is expensive and be difficult to grasp to solve instrument detection device without expensive instrument, easy to operate by the present invention The problem of making has been subjected to field experiment and verifies repeatedly, and the present invention is more in line with current factory and the high-volume of trade market is cold Freeze the urgent need that tuna is checked and accepted.
Detailed description of the invention
Fig. 1 tuna tail muscles sectional drawing, wherein 1,2 be muscle of back;7,8 be abdominal muscles;
Fig. 2 tuna tail muscles are shunk well, it can be seen that intensive shrinking pattern in figure;
Fig. 3 tuna tail muscles are shunk generally, it can be seen that slightly sparse shrinking pattern in figure;
The contraction of Fig. 4 tuna tail muscles is weak, it can be seen that sparse shrinking pattern in figure;
The contraction of Fig. 5 tuna tail muscles is poor, and shrinking pattern is hardly visible in figure.
Specific embodiment
Technical solution of the present invention is further explained below by embodiment, but protection scope of the present invention not by The limitation of embodiment in any form.
Embodiment 1
On September 10th, 2017 carries out ranking to 4 batches of 40 freezing yellowfin tunas, in bright and clear environment, Cutting between tuna dorsal fin the 3rd Section 6 reciprocal is obtained into tail portion with sharp knife, fish tail stripping and slicing is put in order, will cut greatly It is soaked in 30 DEG C of water 3-5 minutes down, until fish block thaws, takes out fish block and lie against in clean white disk, big section court On, surface to fog is dabbed with hand and is disappeared, and tail muscles inspection is carried out, it will be golden according to the degree of shrinkage of tail muscles and muscle color Marlin meat divided rank, specific step is as follows:
(1) the tuna tail portion section Yu Kuai is divided into 8 parts, as shown in Figure 1, passing through 8 pieces of contraction of muscle of massage pressing and observing Situation carries out divided rank
When a) having been shunk by pressing 8 parts of institute's obtaining portion parting marlin, contraction of muscle degree grade is A grades, such as Fig. 2 It is shown;
B) weak or when not shrinking, contraction of muscle degree grade is shunk by there are 2 or less in 8 parts of pressing part tuna It is B grades, as shown in Figure 3;
C) weak or when not shrinking, contraction of muscle degree grade is shunk by there are 4 or less in 8 parts of pressing part tuna It is C grades, as shown in Figure 4;
D) shunk by 8 parts of pressing part weak or when not shrinking, contraction of muscle degree grade is D grades, such as Fig. 5 institute Show.
(2) RGB color standard is used, control muscle color carrys out divided rank:
A) part tuna tail muscles color is peony RGB:143, Isosorbide-5-Nitrae 6 is judged as to be A grades;
B) part tuna tail muscles color is cerise RGB:159,8,50, it is judged as B grades;
C) part tuna tail muscles color is light coral RGB:175,59,72, it is judged as C grades;
D) part tuna tail muscles color is kermesinus RGB:129,72,82, it is judged as D grades;
(3) integrated level divides:It is comprehensive that corresponding freezing tuna is obtained according to contraction of muscle rank and muscle color rank Grade should meet the regulation of table 1.
1 tuna of table tests tail integrated level table
By comprehensive judgement, 6 that the yellowfin tuna grade come is top grade are this time transported, grade is the 12 of good grade Item, grade are 14 of regular grade, and grade is regular grade other 8.
Tuna is eaten raw by what the techniques such as defrosting, segmentation, slice were processed into using above-mentioned 40 yellowfin tuna raw materials Flake products are examined by the product hierarchy of certain enterprise, are coincide with the ranking results of this method.
Embodiment 2
Ranking is carried out to 1 batch of 10 freezing horses Soviet Union tuna, in bright and clear environment on December 17th, 2017 In, cutting between tuna dorsal fin the 3rd Section 6 reciprocal is obtained into tail portion with sharp knife, puts fish tail stripping and slicing in order, it will be big Section is soaked in 30 DEG C of water 3-5 minutes downward, until fish block thaws, is taken out fish block and is lain against in clean white disk, big section Upward, surface to fog is dabbed with hand to disappear, carry out tail muscles inspection, it will according to the degree of shrinkage of tail muscles and muscle color Tuna divided rank, specific step is as follows:
(1) the tuna tail portion section Yu Kuai is divided into 8 parts, as shown in Figure 1, passing through 8 pieces of contraction of muscle of massage pressing and observing Situation carries out divided rank
When a) having been shunk by pressing 8 parts of institute's obtaining portion parting marlin, contraction of muscle degree grade is A grades, such as Fig. 2 It is shown;
B) weak or when not shrinking, contraction of muscle degree grade is shunk by there are 2 or less in 8 parts of pressing part tuna It is B grades, as shown in Figure 3;
C) weak or when not shrinking, contraction of muscle degree grade is shunk by there are 4 or less in 8 parts of pressing part tuna It is C grades, as shown in Figure 4;
D) shunk by 8 parts of pressing part weak or when not shrinking, contraction of muscle degree grade is D grades, such as Fig. 5 institute Show.
(2) RGB color standard is used, control muscle color carrys out divided rank:
A) part tuna tail muscles color is peony RGB:143, Isosorbide-5-Nitrae 6 is judged as to be A grades;
B) part tuna tail muscles color is cerise RGB:159,8,50, it is judged as B grades;
C) part tuna tail muscles color is light coral RGB:175,59,72, it is judged as C grades;
D) part tuna tail muscles color is kermesinus RGB:129,72,82, it is judged as D grades;
(3) integrated level divides:It is comprehensive that corresponding freezing tuna is obtained according to contraction of muscle rank and muscle color rank Grade should meet the regulation of table 1.
1 tuna of table tests tail integrated level table
By comprehensive judgement, 2 that the horse Soviet Union tuna grade come is top grade are this time transported, grade is 4 of good grade, Grade is 3 of regular grade, and grade is regular grade other 1.
Tuna is eaten raw by what the techniques such as defrosting, segmentation, slice were processed into using above-mentioned 10 horses Soviet Union's tuna raw material Flake products examine (see the table below) by the product hierarchy of certain enterprise, reach 90% with the ranking results goodness of fit of this method, There is 1 horse Soviet Union tuna this method to be determined as B grades, the product after processing is determined as C grades.
Table 2 eats tuna piece sense organ evaluating meter raw
Assessment method of the invention is equally applicable to big-eye tunas (Thunnus obesus) and longfinned tunny (Thunnus alalunga), but it is not suitable for bluefin tuna.

Claims (1)

1. a kind of rapid method for assessment for eating freezing tuna grade raw, it is characterised in that fallen tuna dorsal fin with sharp knife Cutting obtains tail portion between the 3rd Section 6 of number, and carries out fish tail defrosting, in bright and clear environment, by the fish tail block after defrosting It lies against on clean white enamel tray, big cut side up, according to the degree of shrinkage of tail muscles and muscle color by tuna It is divided into top grade, good grade, regular grade and regular grade, specific step is as follows:
(1) tuna fish block section is divided into 8 parts, as shown, carried out by 8 pieces of contraction of muscle situations of massage pressing and observing etc. Grade divides
A) when 8 parts have been shunk, contraction of muscle degree grade is A grades;
B) 2 or less shrink weak or when not shrinking in 8 parts, contraction of muscle degree grade is B grades;
C) 4 or less shrink weak or when not shrinking in 8 parts, contraction of muscle degree grade is C grades;
D) 8 parts are shunk weak or when not shrinking, and contraction of muscle degree grade is D grades.
(2) RGB color standard is used, control muscle color carrys out divided rank:
A) muscle color is peony RGB:143, Isosorbide-5-Nitrae 6 is judged as to be A grades;
B) muscle color is cerise RGB:159,8,50, it is judged as B grades;
C) muscle color is light coral RGB:175,59,72, it is judged as C grades;
D) muscle color is kermesinus RGB:129,72,82, it is judged as D grades;
(3) integrated level divides:Integrated level division is carried out according to contraction of muscle rank and muscle color, the regulation of table 1 should be met; 1 tuna of table tests tail integrated level table
CN201810726895.5A 2018-07-05 2018-07-05 A kind of rapid method for assessment for eating freezing tuna grade raw Pending CN108896721A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103439471A (en) * 2013-08-19 2013-12-11 华南理工大学 Freezing-unfreezing circulation-based freshness detection method for freshwater fish slices
CN103487383A (en) * 2013-09-27 2014-01-01 浙江工商大学 Method for measuring meat color luster of tuna by using colorimeter
CN103675220A (en) * 2013-12-09 2014-03-26 浙江工商大学 Method utilizing two texture indexes to jointly determine tuna flesh freshness
CN103728295A (en) * 2013-12-23 2014-04-16 上海海洋大学 Method for rapidly detecting sashimi quality of tuna
CN104792950A (en) * 2015-05-12 2015-07-22 上海海洋大学 Model for predicting shelf life of tuna

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103439471A (en) * 2013-08-19 2013-12-11 华南理工大学 Freezing-unfreezing circulation-based freshness detection method for freshwater fish slices
CN103487383A (en) * 2013-09-27 2014-01-01 浙江工商大学 Method for measuring meat color luster of tuna by using colorimeter
CN103675220A (en) * 2013-12-09 2014-03-26 浙江工商大学 Method utilizing two texture indexes to jointly determine tuna flesh freshness
CN103728295A (en) * 2013-12-23 2014-04-16 上海海洋大学 Method for rapidly detecting sashimi quality of tuna
CN104792950A (en) * 2015-05-12 2015-07-22 上海海洋大学 Model for predicting shelf life of tuna

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
赵永强 等: "鱼类鲜度评价指标及测定方法的研究进展", 《大连海洋大学学报》 *

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Application publication date: 20181127