CN105067409B - A kind of method of restrained stretching amount of water during dough rheological characteristics are determined - Google Patents

A kind of method of restrained stretching amount of water during dough rheological characteristics are determined Download PDF

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CN105067409B
CN105067409B CN201510520379.3A CN201510520379A CN105067409B CN 105067409 B CN105067409 B CN 105067409B CN 201510520379 A CN201510520379 A CN 201510520379A CN 105067409 B CN105067409 B CN 105067409B
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water
dough
silty
flour
amount
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CN105067409A (en
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李振华
崔国有
赵莹
王瑞杰
孙雪原
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Shandong Grain And Oil Testing Center
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Shandong Grain And Oil Testing Center
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Abstract

A kind of method of restrained stretching amount of water in being determined the present invention relates to dough rheological characteristics, specifically during a kind of rheological properties of dough for being applied to be made using tensilometer method measure such as wheat flour, control method of the amount of water in flour to improve the result of the test degree of accuracy and test efficiency, the amount of water that this method is tested using dough tensile is object function, the formation time of dough in being tested according to silty, with the actual amount of water of silty, the amount of water of denseness (denseness and maximum denseness when silty is stirred 5 minutes) linear fit dough tensile experiment in silty whipping process, after adopting said method, the amount of water control of tension test will be quantized, it is available for possessing using personnel the standard method of accurate control amount of water, so as to improve the degree of accuracy and the test efficiency of dough rheological characteristics test.

Description

A kind of method of restrained stretching amount of water during dough rheological characteristics are determined
Technical field
A kind of method of restrained stretching amount of water in being determined the present invention relates to dough rheological characteristics, it is specifically a kind of During rheological properties suitable for determining the dough that is made of such as wheat flour using tensilometer method, the stretching in control flour adds Method of the water to improve the result of the test degree of accuracy and test efficiency.
Background technology
In flour add certain amount water after, integrated just can obtain adhesive aggregation together and have viscoelasticity dough. Although the principal element of decision flour and wheaten food quality is the quality and quantity of gluten, gluten is formed in dough, its Property is all resided on dough property, and it is all to use dough to make various pastries, dough property and pastries property Relation is more direct than gluten.The rheological properties of dough, including flour water absorption rate, formed the time, stabilization time, enhanced stretch resistance, The indexs such as extensibility, are to determine one of important evidence of flour quality and quality, are to weigh flour to add water to form resistance to after dough The overall target of rubbing and viscoelasticity, is the primary analysis indexes of current domestic breeding and Quality Detection unit, it is both by flour The influence of the constituents such as protein content, gluten content, decides the processed goods of the final products such as bread, steamed bun, noodles again Matter, classification that can be to wheat flour and application one reality of offer, science foundation.Therefore, the survey of dough rheological characteristics Setting analysis is increasingly subject to the attention of people.
The method of present analysis dough rheological characteristics is main by farinograph, tensilometer, mixograph, alveograph etc. Instrument is completed, and instrument in the process of running, draws curve map automatically, records dough rheological characteristics, and these determine dough rheological The method for learning characteristic is decided to be the International Standards Method or national standard method of research wheat gluten characteristic and baking quality.Its It is middle to be determined using tensilometer during dough rheological characteristics, the noodles that the dough prepared is first rubbed into tubbiness are generally required, Noodles two ends are fixed, pulled down in centre with hook, untill breaking, resistance to extension is recorded in graph form, The influence of dough characters and improver is calculated according to tracing analysis.
It is not difficult to find out, when using the testers such as tensilometer measurement dough rheological characteristics, before one important It is that water content in the dough for preparing appropriate moisture content, dough is excessive or very few to carry, and can all influence its rheological properties to test Be smoothed out.At present when preparing dough, stretching amount of water therein is typically all to be carried out by means of the experience of testing crew Estimation, its outstanding problem existed is that blindness is big, and the degree of accuracy is low, can directly affect the degree of accuracy of result of the test, then influence To science production and product quality.It there is no the accurate standard of science of accurate control dough amount of water can foundation in the prior art.
The content of the invention
A kind of method of restrained stretching amount of water in being determined the invention discloses dough rheological characteristics, this method is with dough Amount of water be object function, in being tested according to silty in the formation time of dough, the actual amount of water of silty, silty whipping process The factor such as denseness come after the stretching amount of water of linear fit dough, adopting said method, the amount of water control of tension test will be by Quantify, be available for possessing using personnel the standard method of accurate control amount of water, so as to improve the standard of dough rheological characteristics test Exactness and efficiency.
To reach above-mentioned purpose, technical solution of the invention is:
A kind of method of restrained stretching amount of water during dough rheological characteristics are determined, it is characterised in that the restrained stretching The method of amount of water comprises the following steps:
SS1. by a number of flour, add wherein after the salt solution of initial number, flour and salt solution are stirred Mix kneading and obtain a dough with initial viscoelasticity;
SS2. flour of the time no more than 5 minutes is formed in being tested for silty, ensure that dough is stable and accurate Stretching amount of water V when ground carries out rheological properties measure is object function, is tested with the actual amount of water V1 of silty, flour quality In add water stirring 5 minutes when dough consistency M1, the maximum denseness M2 of dough in whipping process that adds water in flour quality experiment be ginseng Number, linear fit is carried out according to the equation of linear regression shown in formula (1):
V=a0+a1 × M1+a2 × M2+a3 × V1 (1)
After the completion of linear fit, linear regression coeffficient a0, a1, a2 and a3 numerical value are drawn;
SS3. flour of the time more than 5 minutes is formed in being tested for silty, ensure that dough stably and accurately Stretching amount of water V when carrying out rheological properties measure is object function, with the actual amount of water V1 of silty, flour quality experiment The dough consistency M1 added water when stirring 5 minutes is parameter, and linear fit is carried out according to the equation of linear regression shown in formula (2):
V=a0 '+a1 ' × M1+a2 ' × V1 (2)
After the completion of linear fit, linear regression coeffficient a0 ', a1 ' and a2 ' numerical value are drawn;
SS4. under given significance, equation of linear regression (1), the conspicuousness of (2) and regression coefficient are examined Conspicuousness.
Preferably, stretching amount of water inquiry table is made, the stretching amount of water inquiry table includes dough during silty is tested The dough consistency M1 that flour adds water when stirring 5 minutes in formation time, the actual amount of water V1 of silty, silty experiment, silty experiment Middle flour adds water the data such as maximum dough consistency M2 in whipping process, and is added water for the stretching corresponding to above-mentioned multi-group data Value, the stretching add water value be by above-mentioned multi-group data substitute into respectively stretching amount of water equation of linear regression obtained from.
Preferably, the significance is 5%-15%.
Flour of the time no more than 5 minutes is formed in being tested preferably for silty, stretching amount of water V is real on silty Flour adds water stirred during dough consistency M1, the silty that flour adds water when stirring 5 minutes in border amount of water V1, silty experiment are tested Maximum dough consistency M2 equation of linear regression is in journey:
V=-56+0.05 × M1+0.05 × M2+V1, wherein, V, V1 unit are ml, and M1, M2 unit are FU.
Flour of the time more than 5 minutes is formed in being tested preferably for silty, stretching amount of water V is actual on silty Amount of water V1, flour add water stirring 5 minutes when dough consistency M1 equation of linear regression be:
V=-56+0.1 × M1+V1, wherein, V, V1 unit are ml, and M1 unit is FU.
Compared with the existing technology, the method for restrained stretching amount of water has such as during dough rheological characteristics of the invention are determined Significant technique effect down:By being fitted in silty experiment face in the formation time of dough, the actual amount of water of silty, silty experiment Powder add water stirring 5 minutes when dough consistency, flour adds water in whipping process and maximum dough consistency and ensure that dough is stable And the relation between stretching amount of water when carrying out rheological properties measure exactly, stretch and add water in control Dough Making Process Value, can largely improve the degree of accuracy of dough rheological characteristics measure, break away from simple in conventional dough tension test The experience for relying on testing crew is added water and causes test accuracy not high, the not strong deficiency of result of the test confidence level;Due to this The mode that invention is provided causes the amount of water of tension test to control to be quantized, and availability test personnel possess accurate control amount of water Standard method, so as to improve the degree of accuracy and the efficiency of dough rheological characteristics test.
Embodiment
For the objects, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, to this hair The method of restrained stretching amount of water is further described during bright dough rheological characteristics are determined, but not as to the present invention's Limit.
Determined using tensilometer during dough rheological characteristics, generally require and the dough prepared is first rubbed into tubbiness Noodles, noodles two ends are fixed, pulled down in centre with hook, and untill breaking, resistance to extension is recorded in graph form Get off, the influence of dough characters and improver is calculated according to tracing analysis.It can be seen that, using the testers such as tensilometer When device measures dough rheological characteristics, an important premise is the water content mistake in the dough for preparing appropriate moisture content, dough It is many or very few, it can all influence being smoothed out for its rheological properties test.
Because stretching amount of water when ensure that dough stably and accurately carries out rheological properties measure and silty are tried Test formation time of middle dough, the actual amount of water of silty, flour add water stirring 5 minutes when dough consistency, flour adds water stirring During the parameter such as maximum dough consistency it is closely related, the face of different range during embodiments of the invention are mainly tested according to silty Group forms the time, and linear fit stretching amount of water adds water when stirring 5 minutes with flour in the actual amount of water of silty, silty experiment The relation that flour adds water in whipping process between maximum dough consistency in dough consistency, silty experiment, to probe into actual rheology In elastic elongation experiment, the optimum stretch amount of water of addition needed for dough is prepared.
The method of restrained stretching amount of water during the dough rheological characteristics of embodiments of the invention are determined, including following step Suddenly:
SS1. by a certain amount of flour, add wherein after the salt solution of initial number, flour and salt solution are stirred Kneading, which obtains one, has the dough of initial viscoelasticity;
SS2. flour of the time no more than 5 minutes is formed in being tested for silty, ensure that dough is stable and accurate Stretching amount of water V when ground carries out rheological properties measure is object function, with face in the actual amount of water V1 of silty, silty experiment Powder add water stirring 5 minutes when dough consistency M1, the flour maximum dough consistency M2 in whipping process that adds water is ginseng in silty experiment Number.A large amount of dough character tension tests are persistently carried out, note collecting stretching amount of water V during experiment every time, silty is actual adds water In amount V1, silty experiment flour add water stirring 5 minutes when dough consistency M1, flour adds water in whipping process most in silty experiment Every group of data are compared and handle and carry out many forward and reverse checkings of wheel in strict accordance with code by the multi-group datas such as big dough consistency M2, As shown in table 1.
Table 1
In the example of table 1,50 groups of data are acquired, certainly, as known to those skilled in the art, are entering line number During according to linear fit, the valid data that actual acquisition is arrived are more, are more conducive to the progress of linear fit, the result of linear fit and The degree of accuracy is more credible.
On the basis of the mass data as shown in table 1 collected, carried out according to the equation of linear regression shown in formula (1) Linear fit:
V=a0+a1 × M1+a2 × M2+a3 × V1 (1)
After the completion of linear fit, the numerical value for drawing linear regression coeffficient a0, a1, a2 and a3 is respectively -56,0.05,0.05, 1;
SS3. flour of the time more than 5 minutes is formed in being tested for silty, ensure that dough stably and accurately Stretching amount of water V when carrying out rheological properties measure is object function, with flour in the actual amount of water V1 of silty, silty experiment The dough consistency M1 added water when stirring 5 minutes is parameter, persistently carries out a large amount of dough character tension tests, is noted every time during experiment Meaning collects the dough consistency M1 that flour adds water when stirring 5 minutes in stretching amount of water V, the actual amount of water V1 of silty, silty experiment Deng multi-group data, every group of data are compared and handles and carries out many forward and reverse checkings of wheel in strict accordance with code, as shown in table 2.
Table 2
The flour sample for being more than 5 minutes due to forming the time gathers difficulty than larger, so as shown in table 2, only acquiring 30 groups of data.Certainly, as known to those skilled in the art, when carrying out data linear fit, what actual acquisition was arrived Valid data are more, are more conducive to the progress of linear fit, the result of linear fit and the degree of accuracy are more credible.
On the basis of the mass data as shown in table 2 collected, carried out according to the equation of linear regression shown in formula (2) Linear fit:
V=a0 '+a1 ' × M1+a2 ' × V1 (2)
After the completion of linear fit, the numerical value for drawing linear regression coeffficient a0 ', a1 ' and a2 ' is respectively -56,0.1,1;
SS4. under given significance, equation of linear regression (1), the conspicuousness of (2) and regression coefficient are examined Conspicuousness.
As examine equation of linear regression validity common method, can respectively significance be 5%, 10%, When 15%, judge whether linear equation is notable for specific variable, and this process can be by statistical known side Method is carried out.
Above example is only the exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention It is defined by the claims.Those skilled in the art can make respectively in the essence and protection domain of the present invention to the present invention Modification or equivalent substitution are planted, this modification or equivalent substitution also should be regarded as being within the scope of the present invention.

Claims (5)

1. a kind of method of restrained stretching amount of water during dough rheological characteristics are determined, it is characterised in that the restrained stretching adds The method of water comprises the following steps:
SS1. by a number of flour, the salt solution V1 of initial number is added wherein, afterwards flour and salt solution is stirred Kneading, which obtains one, has the dough of initial viscoelasticity;
SS2. flour of the time no more than 5 minutes is formed in being tested for silty, ensure that dough stably and accurately enters Stretching amount of water V when row rheological properties are determined is object function, with the actual amount of water V1 of silty, is tested with flour quality Add water stirring 5 minutes when dough consistency M1, the maximum denseness M2 of dough in whipping process that adds water in flour quality experiment be parameter, Linear fit is carried out according to the equation of linear regression shown in formula (1):
V=a0+a1 × M1+a2 × M2+a3 × V1 (1)
After the completion of linear fit, linear regression coeffficient a0, a1, a2 and a3 numerical value are drawn;
SS3. flour of the time more than 5 minutes is formed in being tested for silty, ensure that dough is stably and accurately carried out Rheological properties determine when stretching amount of water V be object function, with the actual amount of water V1 of silty, tested with flour quality in add Dough consistency M1 when water is stirred 5 minutes is parameter, and linear fit is carried out according to the equation of linear regression shown in formula (2):
V=a0 '+a1 ' × M1+a2 ' × V1 (2)
After the completion of linear fit, linear regression coeffficient a0 ', a1 ' and a2 ' numerical value are drawn;
SS4. under given significance, the notable of equation of linear regression (1), the conspicuousness of (2) and regression coefficient is examined Property.
2. according to the method described in claim 1, it is characterised in that make stretching amount of water inquiry table, the stretching amount of water Flour adds water and stirs 5 points in the formation time of dough, the actual amount of water V1 of silty, silty experiment during inquiry table is tested including silty Flour adds water maximum dough consistency M2 data in whipping process in dough consistency M1 during clock and/or silty experiment, and is directed to Stretching corresponding to above-mentioned multi-group data adds water value, and the stretching value that adds water is that above-mentioned multi-group data is substituted into stretching respectively Obtained from amount of water equation of linear regression.
3. according to the method described in claim 1, it is characterised in that the significance is 5%-15%.
4. according to the method described in claim 1, it is characterised in that the formation time is no more than 5 minutes in being tested for silty Flour, the dough consistency that stretching amount of water V adds water when stirring 5 minutes on flour in the actual amount of water V1 of silty, silty experiment The flour maximum dough consistency M2 equation of linear regression in whipping process that adds water is in M1, silty experiment:
V=-56+0.05 × M1+0.05 × M2+V1, wherein, V, V1 unit are ml, and M1, M2 unit are FU.
5. according to the method described in claim 1, it is characterised in that face of the time more than 5 minutes is formed in being tested for silty Powder, the linear regression for the dough consistency M1 that stretching amount of water V adds water when stirring 5 minutes on the actual amount of water V1 of silty, flour Equation is:
V=-56+0.1 × M1+V1, wherein, V, V1 unit are ml, and M1 unit is FU.
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