CN107561128A - The method of salt content and application in a kind of quick measure dry fruit beetle and/or halogen soup - Google Patents
The method of salt content and application in a kind of quick measure dry fruit beetle and/or halogen soup Download PDFInfo
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- CN107561128A CN107561128A CN201710713161.9A CN201710713161A CN107561128A CN 107561128 A CN107561128 A CN 107561128A CN 201710713161 A CN201710713161 A CN 201710713161A CN 107561128 A CN107561128 A CN 107561128A
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Abstract
The invention discloses a kind of method of salt content in quick measure dry fruit beetle and/or halogen soup and application, this method to comprise the following steps：Establish working curve；Sample pretreating；The measure of sample electrical conductivity；Determine the electrical conductivity of the sample solution；Sample salt content calculates.Sample only needs to be measured by be dissolved in water (extraction) processing, stirring and filtering in the present invention, relatively simple compared with the resolution processing procedure of sample in national standard detection, the influence of negligible blank sample when this method determines；The present invention does not have too many restrictive condition to sample, for other samples, such as；A series of appropriate samples such as chicken, chicken soup, sweet tea soup, seasoning soup, handled by certain means, be finally treated as being similar to the testing sample of halogen soup or dry fruit beetle, determined with the invention, it is also possible to better than other assay methods.
Description
Technical field
The invention belongs to field of food, more particularly, to salt content in a kind of quick measure dry fruit beetle and/or halogen soup
Method and application.
Background technology
At present, manufacturer can be bred when producing dry fruit beetle using salt (NaCl) with suppressing harmful microbe, and
Increase meat flavor, but salt content is too high that edible crowd's blood pressure can be caused to raise, and endangers human health.According to GB/T
23586-2009《Stewed meat products》Regulation, the content of salt should be less than or equal to 4% (i.e. in stewed meat products：4g NaCl/
100g meat).Therefore, the salt content in stewed meat products need to be detected to meet standard.
In addition, during dry fruit beetle is produced, the salt in halogen soup is the salt source in dry fruit beetle, the food in halogen soup
Salt content changes with stew in soy sauce time and access times.To ensure that the salt content in dry fruit beetle meets standard, in halogen soup
Salt content is also required to detection in order to reasonably add in being produced in stew in soy sauce.
According to GB 5009.44-2016《The measure of chloride in national food safety standard food》, it is proposed that in food
Potentiometric titration, Fo Erhadefa (indirect precipitation titration), the argentometry (mole method or direct titrimetric method) of chloride content
Totally three kinds of assay methods.Three kinds of methods directly or indirectly titrate chlorion, so as to calculate the content of chloride in food.Wherein
The measure of potentiometric titration chloride suitable for varieties of food items, and Fo Erhadefa (indirect precipitation titration) and argentometry
(mole method or direct titrimetric method) is not suitable for the measure of chloride in dark colour food.
According to GB 5009.44-2016《The measure of chloride in national food safety standard food》, provide three kinds surveys
Determine method.The salt content method of detection meat products is still to be modified at present.
The content of the invention
It is an object of the invention to solve not to be suitable for the deeper soup class of color in the prior art, time-consuming for method, is not easy to
Quickly in high volume determine and consume the problem of a large amount of reagents easily cause the pollution to environment.
The present inventor draws following discovery by research：
On the one hand, inventor has found that halogen soup color is deeper by experiment, is not convenient to use Fo Erhadefa (precipitations indirectly
Titration), argentometry (mole method or direct titrimetric method).If according to dry fruit beetle processing procedure, more fat is contained in halogen soup
Fat and protein, often fierce the collapsing of appearance is splashed in carbonisation or podzolic process, is made tested component loss serious, is influenceed to survey
Determine the accuracy of result.
On the other hand, inventor has found in an experiment, due to containing more fat and protein in dry fruit beetle, is carbonizing
During often there is fierce collapsing and splash, make tested component loss serious, influence the accuracy of measurement result.Sample pretreating process
Half an hour is more long, and time-consuming, is not easy to quick, high-volume and determines.
Instrument and equipment letter needed for Fo Erhadefa (indirect precipitation titration), argentometry (mole method or direct titrimetric method)
It is single, can arbitrarily it select in many aspects, but titration end-point unobvious, easily restricted by solution colour, when batch determines,
Minute is long, workload is big, cumbersome, during the liquor analysis high for chloride content, need to consume substantial amounts of silver nitrate
Reagent, and easily cause the pollution to environment.Potentiometric titration can quickly determine chlorion, use potentiometric titrimeter, pre-treatment
Step is more complicated, not only needs to be acidified with nitric acid, adds acetone reagent, it is also necessary to a certain amount of nitric acid argentum reagent is consumed, and
The result of measure needs to be calculated with first derivative and second derivative value.
On the basis of above-mentioned discovery, the present invention is inventors herein proposed.
The first aspect of the present invention provides a kind of method of salt content in quick measure dry fruit beetle and/or halogen soup, the party
Method comprises the following steps：
(1) working curve is established
The electrical conductivity of the chlorination sodium standard solution of finite concentration gradient is determined, with the corresponding electricity of sodium chloride molar concentration
On the basis of conductance, working curve, linear formula are made；
(2) sample pretreating
Sample to be tested is handled using at least one of dissolving, carbonization, ashing, extraction or ultrasound mode, makes the chlorine in sample
It is completely soluble in water to change sodium, by filtrate constant volume, obtains sample to be tested solution；
(3) measure of sample electrical conductivity
Determine the electrical conductivity of the sample solution；
(4) sample salt content calculates
The conductivity value of sample solution is substituted into step (1) gained linear formula and obtains brine concentration, by brine concentration generation
Enter salt content calculation formula, obtain the content value of salt in sample.
In the present invention, processing method when sample is solid is preferably：Materials and be placed in water, stir, make in sample
Salt is completely dissolved, by filtrate constant volume after filtering.
In the present invention, processing method when sample is liquid is preferably：Materials and be placed in water stirring, make the food in sample
Salt is completely dissolved, constant volume.
Salt content calculation formula is formula 1 when sample is solid；
In formula 1, C be sample solution brine concentration, mol/L；V be sample solution constant volume volume, L；M is sodium chloride
Molal weight, 58.5g/mol；M be sample quality, g；W (sample) be sample salt content, g/100g；
Salt content calculation formula is formula 2 when sample is liquid；
In formula 2, C be sample solution brine concentration, mol/L；V be sample solution constant volume volume, L；M is sodium chloride
The molal weight of (salt), 58.5g/mol；V0For the volume of sample, mL；W (sample) be sample salt content, g/100mL.
In the weak solution of strong electrolyte pure component system, during constant temperature, the concentration of component is directly proportional to electrical conductivity, Ke Yitong
The standard curve for making electrical conductivity-concentration is crossed, obtains calculation formula.Determined by the electrical conductivity of determination sample solution in its sample
Strong electrolyte concentration of component value.
In sodium chloride weak solution, the molar concentration (C) of sodium chloride is directly proportional to solution total conductivity (κ), can pass through
Make the standard curve of electrical conductivity-concentration, obtain calculation formula.Sauce halogen is determined by the electrical conductivity of determination sample processing solution again
The concentration value of sodium chloride (salt) in meat and halogen soup.
In the present invention, the number of the concentration gradient is preferably 3-8.
In the present invention, it is preferable that step (1) establishes the temperature of working curve and the temperature of step (3) test sample electrical conductivity
Spend identical, be 20-30 DEG C.
In the present invention, to improve test accuracy, the measure number of the sample solution electrical conductivity is preferably 1-8 times, secondary
Averaged during number ＞ 1.
In the present invention, step (2) the sample to be tested solution can be diluted.
The second aspect of the present invention provides application of the above method in field of food.
Advantages of the present invention and effect are as follows：
1st, sample only needs to be measured by be dissolved in water (extraction) processing, stirring and filtering in the present invention, with
The resolution processing procedure of sample is compared relatively simple in national standard detection, is by non-salt composition in national standard detection method
Directly or indirectly dispose, cause sample preparation time to lengthen, sample pretreating process complexity, negligible blank when this method determines
The influence of sample, " influence of negligible blank sample ", refers to that blank sample does not influence the measure of electrical conductivity, but the conductance of blank sample
Rate value needs to deduct, and the conductivity value tested in the present invention is to deduct blank sample electrical conductivity of solution value by sample solution electrical conductivity
Obtain.
2nd, the present invention use electrochemical method, using electrical conductivity quickly, Accurate Determining salt content, the invention is according to experiment
Principle and process mainly use micro conductivity instrument, and cost reduces compared with the instrument needed for national standard detection, reduces experiment
Consumptive material, minute significantly shorten compared to national examination criteria.
3rd, the salt content recovery of standard addition that this method is used to determine halogen soup sample is 98%, for determining the salt of dry fruit beetle
Content recovery of standard addition is 99%, and this method is reproducible, meets and independent measurement result twice is obtained under repeated condition determination
Absolute difference must not exceed 5% standard of arithmetic mean of instantaneous value.
4th, the present invention need not add any Heavy Metal Reagent, and sample handling processes are no more than ten minutes, sample pretreating side
Formula is simple, and sample pretreating needs instrument few, and key instrument is micro conductivity instrument, and cost is low and portable, five minutes i.e. readable,
Follow-up calculating is simple, only uses and substitutes into formula calculating.Can quickly, high-volume, determine salt in dry fruit beetle and halogen soup exactly
Content.
5th, the present invention does not have too many restrictive condition to sample, for other samples, such as；Chicken, chicken soup, sweet tea soup, tune
A series of appropriate samples such as taste soup, handled by certain means, be finally treated as being similar to treating for halogen soup or dry fruit beetle
Test sample product, determined with the invention, it is also possible to better than other assay methods.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Fig. 1 shows the working curve diagram of the electrical conductivity of the embodiment of the present invention 1 (κ) and sodium chloride molar concentration (C).
Embodiment
The preferred embodiment of the present invention is described in more detail below.Although the following describe being preferable to carry out for the present invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without should be limited by embodiments set forth herein.Phase
Instead, there is provided these embodiments be in order that the present invention is more thorough and complete, and can be by the scope of the present invention intactly
It is communicated to those skilled in the art.
Embodiment 1
Sauced duck meat meat and the salt content of halogen soup measure, specific implementation step are as follows：
(1) working curve is established
Compound concentration scope 0.001-0.01mol/L concentration gradients be 0.002mol/L chlorination sodium standard solution, electricity consumption
Electrical conductivity instrument determines the standard liquid electrical conductivity of 30 DEG C of constant temperature, show that electrical conductivity is in sodium chloride molar concentration by calculating and mapping
The working curve of linear relationship, fitting obtains the reduction formula of electrical conductivity and concentration, as shown in Figure 1, for salt in sample
The calculating of content.
(2) sample pretreating
For halogen soup sample, 2mL (being accurate to 0.1mL) is taken, adds appropriate pure water, stirs 3 minutes, allows salt to be completely dissolved in
In pure water, it is to be measured that solution is settled to 500mL.
For dry fruit beetle sample, 1g (being accurate to 0.0001g) is taken, adds appropriate pure water, stirs 5 minutes, makes salt complete
It is dissolved in pure water, with the filtered through gauze totally soaked, repeatedly rinses gauze, it is to be measured that filtrate is settled into 100mL.
(3) measure of sample electrical conductivity
With the electrical conductivity of conductivity meter measure constant temperature (consistent with the temperature for surveying standard liquid) sample solution.Each parallel survey
It is fixed four times, averaged.
(4) sample salt content calculates
The conductivity value of sample solution is substituted into linear reduction formula and obtains brine concentration (C).C values are substituted into sample salt
Cubage formula, obtain the content value (w) of salt in sample.
Salt content calculation formula is as follows in dry fruit beetle sample：
In formula 1, C be halogen meat sample solution brine concentration, mol/L；V be sample solution constant volume volume, L；M is chlorination
The molal weight of sodium (salt), 58.5g/mol；M be halogen meat sample product quality, g；W (halogen meat) be halogen meat salt content, g/
100g。
Salt content calculation formula is as follows in halogen soup sample：
In formula 2, C be halogen soup sample solution brine concentration, mol/L；V be sample solution constant volume volume, L；M is chlorination
The molal weight of sodium (salt), 58.5g/mol；V0For the volume of halogen soup sample, mL；W (halogen soup) be halogen soup salt content, g/
100mL。
Some experimental data and result are as follows：
The halogen soup sample size of table 1 determines
The dry fruit beetle sample size of table 2 determines
It will be seen from figure 1 that linear correlation of sodium chloride (salt) molar concentration (C) to the working curve of electrical conductivity (κ)
Coefficients R2=1, illustrate that sodium chloride concentration and electrical conductivity have good linear relationship, therefore the principle of the invention is correct.Line
Property reduction formula is：κ=119805C+5.3336, κ unit is that μ S/cm, C unit are mol/L in formula.
As can be seen from Table 1, the salt content result determined in halogen soup is reproducible, RSD (%)=1.01.Illustrate experiment
As a result accuracy is high, and method is reliable.
As can be seen from Table 2, the salt content result determined in dry fruit beetle is reproducible, RSD (%)=1.09.Illustrate real
Result accuracy height is tested, method is reliable.
Test case 1
The mark-on reclaims of sauced duck meat meat and the salt content of halogen soup are tested.
The present invention tests the essence for the salt content testing result further examined in halogen meat and halogen soup sample with mark-on reclaims
Exactness.
Specific implementation step is as follows：
(1) working curve
The present embodiment quotes working curve and corresponding linear formula in embodiment 1.
(2) sample pretreating
For halogen soup sample, two parts are taken respectively, and every part takes 2mL (being accurate to 0.1mL).A copy of it adds appropriate pure water,
Stirring 3 minutes, allows salt to be completely dissolved in pure water, is settled to 500mL.Another adds appropriate pure water and a certain amount of drying
Pure sodium chloride is analyzed, about 0.1g (is accurate to 0.0001g), stirs 3 minutes, allows salt to be completely dissolved in pure water, be settled to
500mL.Two parts of solution are to be measured.
For dry fruit beetle sample, two parts are taken respectively, and every part takes 1g (being accurate to 0.0001g).A copy of it adds in right amount pure
Water, stir 5 minutes, with the filtered through gauze totally soaked, filtrate is settled to 100mL with pure water rinsing gauze three times.Another
Appropriate pure water and the analysis pure sodium chloride of a certain amount of drying are added, about 0.015g (is accurate to 0.0001g), stirs 5 minutes, uses
The filtered through gauze totally soaked, filtrate is settled to 100mL with pure water rinsing gauze three times.Two parts of solution are to be measured.
(3) measure of sample electrical conductivity
With the electrical conductivity of conductivity meter measure constant temperature (consistent with the temperature for surveying standard liquid) sample solution.Each parallel survey
It is fixed four times, averaged.
(4) sample salt content recovery of standard addition calculates
The conductivity value of sample solution is substituted into linear reduction formula and obtains brine concentration (C).C values are substituted into mark-on reclaims
Measuring and calculation formula, obtains recovery of standard addition.
Calculation formula is as follows in the test of dry fruit beetle sample mark-on reclaims：
Δ m'=(C'-C) × V × M formulas 4
In formula 3,4, C, C are ' for the brine concentration that halogen meat sample solution mark-on is forward and backward, mol/L；V is sample solution constant volume
Volume, L；M be sodium chloride (salt) molal weight, 58.5g/mol；Δ m be add salt quality actual value, g；Δ m ' is
Add the test value of salt quality.
Calculation formula is as follows in the test of halogen soup sample mark-on reclaims：
Δ m'=(C'-C) × V × M formulas 6
In formula 5,6, C, C are ' for the brine concentration that halogen soup sample solution mark-on is forward and backward, mol/L；V is sample solution constant volume
Volume, L；M be sodium chloride (salt) molal weight, 58.5g/mol；Δ m be add salt quality actual value, g；Δ m ' is
Add the test value of salt quality.Some experimental data and result are as follows：
The halogen soup sample mark-on reclaims of table 3 are tested
The halogen meat sample product mark-on reclaims of table 4 are tested
As can be seen from Table 3, halogen soup sample mark-on reclaims test in recovery of standard addition be up to 98.67, RSD (%)=
1.12.Illustrate the detection of method salt content suitable for halogen soup of the present invention, and experimental result accuracy is high.
As can be seen from Table 4, dry fruit beetle sample mark-on reclaims test in recovery of standard addition be up to 99.58, RSD (%)=
2.57.Illustrate the detection of method salt content suitable for dry fruit beetle of the present invention, and experimental result accuracy is high.
It is described above various embodiments of the present invention, described above is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.
Claims (10)
1. a kind of method of salt content in quick measure dry fruit beetle and/or halogen soup, it is characterised in that this method includes following step
Suddenly：
(1) working curve is established
The electrical conductivity of the chlorination sodium standard solution of finite concentration gradient is determined, with the corresponding electrical conductivity of sodium chloride molar concentration
On the basis of, make working curve, linear formula；
(2) sample pretreating
Sample to be tested is handled using at least one of dissolving, carbonization, ashing, extraction or ultrasound mode, makes the sodium chloride in sample
It is completely soluble in water, by filtrate constant volume, obtain sample to be tested solution；
(3) measure of sample electrical conductivity
Determine the electrical conductivity of the sample solution；
(4) sample salt content calculates
The conductivity value of sample solution is substituted into step (1) gained linear formula and obtains brine concentration, brine concentration is substituted into and eaten
Salt content calculation formula, obtain the content value of salt in sample.
2. the method for salt content in quick measure dry fruit beetle according to claim 1 and/or halogen soup, wherein, sample is
Processing method during solid is：Materials and be placed in water, stir, be completely dissolved the salt in sample, determine filtrate after filtering
Hold.
3. the method for salt content in quick measure dry fruit beetle according to claim 1 and/or halogen soup, wherein, sample is
Processing method during liquid is：Materials and be placed in water stirring, be completely dissolved the salt in sample, constant volume.
4. the method for salt content in quick measure dry fruit beetle according to claim 1 and/or halogen soup, wherein, sample is
Salt content calculation formula is formula 1 during solid；
In formula 1, C be sample solution brine concentration, mol/L；V be sample solution constant volume volume, L；M is mole of sodium chloride
Quality, 58.5g/mol；M be sample quality, g；W (sample) be sample salt content, g/100g.
5. the method for salt content in quick measure dry fruit beetle according to claim 1 and/or halogen soup, wherein, sample is
Salt content calculation formula is formula 2 during liquid；
In formula 2, C be sample solution brine concentration, mol/L；V be sample solution constant volume volume, L；M is sodium chloride (salt)
Molal weight, 58.5g/mol；V0For the volume of sample, mL；W (sample) be sample salt content, g/100mL.
6. the method for salt content in quick measure dry fruit beetle according to claim 1 and/or halogen soup, wherein, it is described dense
The number for spending gradient is 3-8.
7. the method for salt content in quick measure dry fruit beetle according to claim 1 and/or halogen soup, wherein, step (1)
It is identical with the temperature of step (3) test sample electrical conductivity to establish the temperature of working curve, is 20-30 DEG C.
8. the method for salt content in quick measure dry fruit beetle according to claim 1 and/or halogen soup, wherein, the examination
The measure number of sample electrical conductivity of solution is 1-8 times, is averaged during number ＞ 1.
9. the method for salt content in quick measure dry fruit beetle according to claim 1 and/or halogen soup, wherein, can be to step
Suddenly (2) described sample to be tested solution is diluted.
10. application of the method in claim 1-9 described in any one in field of food.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261442A (en) * | 2019-07-24 | 2019-09-20 | 武汉轻工大学 | A kind of method that Fast synchronization detects sodium chloride and potassium chloride in food |
| CN114487027A (en) * | 2021-12-27 | 2022-05-13 | 无锡赞匠生物科技有限公司 | Method for measuring total solid shape in grain thick slurry through conductivity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346057A (en) * | 2000-07-13 | 2002-04-24 | 株式会社百利达 | Salt content extracting instrument |
| CN101078681A (en) * | 2007-06-29 | 2007-11-28 | 山东电力研究院 | Method for determining sodium chloride content in phosphate using spectrophotometry |
| CN102297845A (en) * | 2011-05-25 | 2011-12-28 | 杨季冬 | Method for rapidly detecting salt content in Fuling mustard tuber with near infrared spectroscopy |
-
2017
- 2017-08-18 CN CN201710713161.9A patent/CN107561128A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346057A (en) * | 2000-07-13 | 2002-04-24 | 株式会社百利达 | Salt content extracting instrument |
| CN101078681A (en) * | 2007-06-29 | 2007-11-28 | 山东电力研究院 | Method for determining sodium chloride content in phosphate using spectrophotometry |
| CN102297845A (en) * | 2011-05-25 | 2011-12-28 | 杨季冬 | Method for rapidly detecting salt content in Fuling mustard tuber with near infrared spectroscopy |
Non-Patent Citations (2)
| Title |
|---|
| 国家卫生和计划生育委员会: "《GB5009.44-2016食品安全国家标准 食品中氯化物的测定》", 31 August 2016 * |
| 陈炜 等: ""芦笋罐头中氯化钠含量的不同测定方法的对比试验研究"", 《宁夏农学院学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261442A (en) * | 2019-07-24 | 2019-09-20 | 武汉轻工大学 | A kind of method that Fast synchronization detects sodium chloride and potassium chloride in food |
| CN114487027A (en) * | 2021-12-27 | 2022-05-13 | 无锡赞匠生物科技有限公司 | Method for measuring total solid shape in grain thick slurry through conductivity |
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Application publication date: 20180109 |