CN115669912B - Iodine-added selenium-enriched edible salt and preparation method thereof - Google Patents
Iodine-added selenium-enriched edible salt and preparation method thereof Download PDFInfo
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- 239000011669 selenium Substances 0.000 title claims abstract description 114
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- 235000006666 potassium iodate Nutrition 0.000 claims abstract description 24
- 239000001230 potassium iodate Substances 0.000 claims abstract description 24
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- 229910052878 cordierite Inorganic materials 0.000 claims abstract description 21
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- FRHBOQMZUOWXQL-UHFFFAOYSA-L ammonium ferric citrate Chemical compound [NH4+].[Fe+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O FRHBOQMZUOWXQL-UHFFFAOYSA-L 0.000 claims abstract description 19
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 5
- 229930002875 chlorophyll Natural products 0.000 claims description 3
- 235000019804 chlorophyll Nutrition 0.000 claims description 3
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 claims description 3
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- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 abstract description 21
- 229910052740 iodine Inorganic materials 0.000 abstract description 21
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- AUYYCJSJGJYCDS-LBPRGKRZSA-N Thyrolar Chemical class IC1=CC(C[C@H](N)C(O)=O)=CC(I)=C1OC1=CC=C(O)C(I)=C1 AUYYCJSJGJYCDS-LBPRGKRZSA-N 0.000 description 2
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- 230000006016 thyroid dysfunction Effects 0.000 description 2
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- GXCLVBGFBYZDAG-UHFFFAOYSA-N N-[2-(1H-indol-3-yl)ethyl]-N-methylprop-2-en-1-amine Chemical compound CN(CCC1=CNC2=C1C=CC=C2)CC=C GXCLVBGFBYZDAG-UHFFFAOYSA-N 0.000 description 1
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- JIKZEPRTARLVKA-UHFFFAOYSA-N [Se].[I] Chemical compound [Se].[I] JIKZEPRTARLVKA-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
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Abstract
The invention discloses iodine-added selenium-enriched edible salt which comprises the following components in parts by weight: 991-999 parts of edible salt, 0.5-3 parts of dry powder of cardamine cordierite, 0.2-0.6 part of Arabic gum, 0.030-0.065 part of potassium iodate and 0-0.02 part of ferric ammonium citrate; the preparation method comprises spraying aqueous solution containing potassium iodate and ferric ammonium citrate at 45-55deg.C into continuously stirred edible salt, spraying 7.5wt% acacia aqueous solution containing 15wt% dry powder of herba Violae, and oven drying at 50-60deg.C, wherein the materials are continuously and slightly turned during oven drying to ensure uniform heating; the product of the invention is uniform and is not layered, the quality is stable, the iodine content is 18-39mg/kg, the selenium content is more than 3000 mug/kg, the intake of resident iodine can be effectively ensured, the intake of selenium nutrient is improved, the health level of people is improved, the preparation method is simple and reliable, the operability is strong, and the large-scale production is easy to realize.
Description
Technical Field
The invention belongs to the technical field of edible salt processing, and relates to iodine-added selenium-enriched edible salt and a preparation method thereof.
Background
At present, the public supplements selenium mainly by taking selenium-rich health care products and medicines, and the risks of inconvenient taking, non-lasting taking, high cost, selenium poisoning caused by excessive supplementation and the like exist.
The nutrient supplement by the food is the safest and most popular method internationally accepted. China forms a set of scientific and complete system through salt iodine supplementation, but the selenium supplementation through salt needs to be further explored, and the main problems at present are as follows: the selenium content of the selenium raw material adopted by the existing selenium-rich salt is generally low and generally not more than 200mg/kg; meanwhile, the processing technology is poor, uneven mixing of products is easy to cause, layering and other phenomena occur, and the addition amount of the selenium raw material is limited, so that the selenium content in the selenium-rich salt finished product is generally not more than 400 mug/kg. According to the calculation that 10g of salt is taken by adults every day, the selenium supplemented by the selenium-enriched salt is only 4 mug/d, and has limited effect on improving selenium intake deficiency of residents in China.
Disclosure of Invention
Therefore, the invention aims to develop the iodized selenium-enriched edible salt, the product meets the requirement of GB 2721 edible salt, the selenium content meets the selenium-enriched claiming condition of GB 28050, namely, the selenium content is more than or equal to 150 mug/kg, the iodine content meets the related requirement of GB 26878, the iodine and the selenium are double-supplementing, the product is uniform and not layered, the quality is stable, the intake of resident iodine can be effectively ensured, the intake of selenium nutrient is improved, the health level of people is improved, and the preparation method is simple and reliable, has strong operability and is easy to realize large-scale production.
Through researches, the invention provides the following technical scheme:
1. The iodized selenium-enriched edible salt comprises the following components in parts by weight: 991-999 parts of edible salt, 0.5-3 parts of dry powder of cardamine violifolia, 0.2-0.6 part of Arabic gum, 0.030-0.065 part of potassium iodate and 0-0.02 part of ferric ammonium citrate.
Preferably, the iodized selenium-enriched edible salt comprises the following components in parts by weight: 997 parts of edible salt, 1 part of dry powder of cardamine cordierite, 0.3-0.4 part of Arabic gum, 0.042-0.05 part of potassium iodate and 0.01-0.02 part of ferric ammonium citrate.
Preferably, the granularity of the dry powder of the cardamine cordierite is 200-1000 meshes.
2. The preparation method of the iodized selenium-enriched edible salt comprises the following steps: in continuously stirred edible salt, firstly spraying an aqueous solution of 45-55 ℃ dissolved with potassium iodate and ferric ammonium citrate, then spraying a 7.5wt% acacia aqueous solution mixed with 15wt% of dry powder of cardamine violifolia, and then drying at 50-60 ℃, wherein the materials are continuously and slightly turned in the drying process to ensure that the materials are heated uniformly, thus obtaining the finished product of the iodized selenium-enriched edible salt.
Preferably, the preparation method of the iodized selenium-enriched edible salt comprises the following steps:
S1, completely dissolving potassium iodate and ferric ammonium citrate in water to form a solution with the concentration of 10wt% of potassium iodate, spraying the solution into continuously stirred edible salt at the spraying pressure of 2kg/cm 2 and the speed of 40-50ml/min at the temperature of 45-55 ℃, and continuously stirring for 5min after the spraying is finished to obtain iodized salt;
S2, sieving the dry powder of the cardamine violifolia through a 200-mesh sieve, mixing the dry powder with a 7.5wt% Arabic gum aqueous solution to obtain paste with the cardamine violifolia concentration of 15wt%, spraying the paste into the iodized salt obtained in the step S1 with continuous stirring, and spraying compressed air with the pressure of 4kg/cm 2 to obtain the iodized selenium-enriched salt;
S3, drying the iodized selenium-enriched salt obtained in the S2 at 50-60 ℃ until the moisture is less than 0.08wt%, and continuously turning the material in a self-gravity type for 5-10 times per minute in the drying process to ensure that the material is heated uniformly, thus obtaining the iodized selenium-enriched edible salt finished product.
Preferably, the dry powder of the cardamine violifolia is obtained by cleaning a cardamine violifolia plant, soaking the cardamine violifolia plant in ethanol to remove chlorophyll, freezing the cardamine violifolia plant at a temperature of between 40 ℃ below zero and 50 ℃ below zero, quickly heating the cardamine violifolia plant to 40 ℃ below zero to 50 ℃ below zero, performing sublimation dehydration drying, and then performing superfine grinding to 200-1000 meshes.
Compared with the prior art, the invention mainly makes the following technical improvements:
(1) The product is double-supplementing iodine and selenium to avoid thyroid dysfunction caused by simple iodine supplementation
The iodine-enriched selenium-enriched salt can realize iodine-selenium double supplementation, selenium can improve the activity of D1-type deiodinase, is beneficial to the synthesis and the function of thyroid hormone, and meanwhile, selenium can also remove peroxidation generated in the synthesis process of thyroid hormone, maintain the oxidation-resistant dynamic balance of thyroid gland and protect thyroid cells from oxidative stress injury, thereby avoiding the problem that thyroid dysfunction is possibly caused by pure iodine supplementation.
(2) Preferably selecting food-grade selenium-rich raw material to solve the problem of low selenium content of the product
The invention screens out a food-grade selenium-rich raw material called poly-selenium king, namely, the cardamine cordierite, the selenium content of dry powder products can reach more than 4000mg/kg, the organic selenium accounts for over 90 percent, and the iodized selenium-rich salt finished product prepared by taking the selenium-rich raw material as the selenium raw material has high selenium content, and the selenium-rich raw material has the faint scent of natural plants on smell, thus being easily accepted by masses.
(3) Optimizing production process to solve the problems of uneven and layered products
Firstly, in the development of edible salt products, arabic gum is firstly adopted as an adhesive, and after the Arabic gum is dissolved in water, a solution with viscosity is formed, and through a continuous micro high-pressure spraying and wrapping process, the selenium raw material is uniformly and firmly adhered to the surface of salt crystals, so that the method has the advantages of basically no loss of the selenium raw material and controllable addition, and the problems that the iodine and selenium element content of the traditional mixed stirring mode product is unevenly distributed, the iodine and selenium raw material adhered to the surface of the salt crystals is easy to fall and layering are avoided, and the quality stability of the product is effectively ensured.
Secondly, in the drying process after spraying, the self-weight falling of the materials is utilized to keep the materials to continuously turn over and be heated uniformly, so that the problem that the materials are agglomerated and agglomerated during the full static drying of the product is successfully solved, and meanwhile, the problems that the product is unqualified and the like due to layering of the fallen auxiliary materials and salt crystals due to falling of the auxiliary materials caused by falling of the auxiliary materials sprayed on the surface of the salt due to mutual friction and collision of the materials in a fluidized bed when a boiling drying process is adopted are avoided.
The invention has the beneficial effects that: the invention provides an iodized selenium-enriched edible salt, which can realize double iodine and selenium supplementation, wherein the iodine content is 18-39mg/kg, the selenium content is more than 3000 mug/kg, and the selenium element can be supplemented more than 30 mug per day according to the daily intake of 10g of salt by an adult, so as to achieve the reference intake of dietary nutrient of Chinese residents part 3: the recommended intake of selenium for adults in microelement is more than 50% of the recommended intake of selenium for adults, so that the intake of selenium nutrient can be effectively improved while the intake of iodine of residents is ensured, the health level of people is improved, and diseases caused by insufficient intake of selenium are reduced. In addition, the production process of the iodized selenium-enriched edible salt is simple and reliable, has strong operability and is easy to realize large-scale production.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more apparent, preferred embodiments of the present invention are described in detail below.
The dry powder of the cardamine violifolia used in the preferred embodiment is obtained by cleaning the cardamine violifolia plant, soaking in ethanol to remove chlorophyll, freezing at-40 ℃ to-50 ℃, quickly heating to 40 ℃ to 50 ℃ for sublimation, dehydration and drying, and superfine grinding to 200 meshes.
Example 1
The iodized selenium-enriched edible salt comprises the following components in parts by weight: 997 parts of edible salt, 1 part of dry powder of cardamine cordierite, 0.3 part of Arabic gum, 0.042 part of potassium iodate and 0.02 part of ferric ammonium citrate; the granularity of the dry powder of the cardamine cordierite is 200 meshes, and the selenium content is 4000mg/kg.
The preparation method comprises the following steps:
S1, dissolving potassium iodate and ferric ammonium citrate in water to form a solution with the concentration of 10wt% of potassium iodate, spraying the solution into continuously stirred edible salt at the spraying pressure of 2kg/cm 2 and the speed of 40-50ml/min at the temperature of 45-55 ℃ and continuously stirring for 5min after the spraying is finished to obtain iodized salt;
S2, sieving the dry powder of the cardamine violifolia through a 200-mesh sieve, mixing the dry powder with a 7.5wt% of acacia aqueous solution to obtain paste with the cardamine violifolia concentration of 15wt%, spraying the paste into the iodized salt obtained in the step S1 with continuous stirring, and spraying compressed air with the pressure of 4kg/cm 2 to obtain the iodized selenium-enriched salt;
S3, drying the iodized selenium-enriched salt obtained in the S2 at the temperature of 60+/-2 ℃ until the moisture is 0.03-0.05 wt%, wherein the self-weight falling type continuous turning of the material is ensured to be heated uniformly for 5-10 times per minute in the drying process, and the iodized selenium-enriched edible salt finished product is obtained.
According to the method, 2 parts of selenium-enriched oyster mushroom powder, 2 parts of selenium-enriched malt powder and 2 parts of selenium-enriched yeast powder are respectively used for replacing 1 part of dry powder of cardamine cordierite, the addition amount of other components and the preparation method are unchanged, so that finished products of iodized selenium-enriched edible salt with different selenium raw materials are prepared, and the sensory evaluation and content evaluation of the finished products are carried out. The evaluation results are shown in Table 1, the finished product of the iodized selenium-enriched salt prepared by taking the cardamine violifolia as a selenium raw material is more easily accepted by masses in terms of smell and color, and the finished product has high selenium content, can supplement 37 mug/d of selenium element according to the daily intake of 10g of salt by adults, and has substantial effects of improving the selenium intake level of people and promoting the health of people.
TABLE 1 evaluation of different selenium raw material products
Example 2
The iodized selenium-enriched edible salt is prepared from the following raw materials in parts by weight: 997 parts of edible salt, 1 part of dry powder of cardamine cordierite, 0.4 part of Arabic gum, 0.05 part of potassium iodate and 0.01 part of ferric ammonium citrate; the granularity of the dry powder of the cardamine cordierite is 200 meshes, and the selenium content is 4000mg/kg.
The preparation method comprises the following steps:
S1, dissolving potassium iodate and ferric ammonium citrate in water to form a solution with the concentration of 10wt% of potassium iodate, spraying the solution into continuously stirred edible salt at the spraying pressure of 2kg/cm 2 and the speed of 40-50ml/min at the temperature of 45-55 ℃ and continuously stirring for 5min after the spraying is finished to obtain iodized salt;
S2, sieving the dry powder of the cardamine violifolia through a 200-mesh sieve, mixing the dry powder with 7.5wt% of an aqueous solution of Arabic gum to obtain slurry, and spraying the slurry into the iodized salt obtained in the step S1 with continuous stirring to obtain the iodized selenium-enriched salt;
S3, drying the iodized selenium-enriched salt obtained in the S2 at the temperature of 60+/-2 ℃ until the moisture is 0.03-0.05 wt%, wherein the self-weight falling type continuous turning of the material is ensured to be heated uniformly for 5-10 times per minute in the drying process, and the iodized selenium-enriched edible salt finished product is obtained.
According to the method, the spraying concentration and the spraying compressed air pressure of the cardamine cordierite in the step S2 are adjusted, and the two are optimally combined and screened. The screening results are shown in Table 2, and the maximum spraying concentration can bring less water under the condition of bringing the same selenium-rich raw material, and the consumption of heat energy during later drying is also less, so that the feasibility of the preparation method combined with the consumption of heat energy and other factors are comprehensively considered, the spraying concentration of the cardamine cordierite is preferably 15wt%, and the spraying compressed air pressure is preferably 4kg/cm 2.
TABLE 2 spray concentration and spray compressed air pressure screening
Comparative example 1
The iodized selenium-enriched edible salt comprises the following components in parts by weight: 997 parts of edible salt, 1 part of dry powder of cardamine cordierite, 0.3 part of Arabic gum, 0.042 part of potassium iodate and 0.02 part of ferric ammonium citrate; the granularity of the dry powder of the cardamine cordierite is 200 meshes, and the selenium content is 4000mg/kg.
The preparation method comprises the following steps:
S1, dissolving potassium iodate and ferric ammonium citrate in water to form a solution with the concentration of 10wt% of potassium iodate, and spraying the solution into edible salt in a fluidized state in a fluidized bed at the spraying pressure of 2kg/cm 2 and the speed of 40-50ml/min at the temperature of 45-55 ℃ and controlling the temperature of an air outlet of the fluidized bed at 60+/-2 ℃ to obtain iodized salt;
S2, sieving the dry powder of the cardamine violifolia through a 200-mesh sieve, mixing the dry powder with a 7.5wt% of acacia aqueous solution to obtain paste with the cardamine violifolia concentration of 15wt%, spraying the paste into the iodized salt obtained in the S1 which is continuously fluidized, and spraying compressed air with the pressure of 4kg/cm 2 to obtain the iodized selenium-enriched salt;
S3, continuously fluidizing and drying the iodized selenium-enriched salt obtained in the S2 until the water content is 0.03-0.05 wt%, and obtaining the iodized selenium-enriched edible salt finished product.
And (3) randomly sampling 3 points of the finished iodized selenium-enriched edible salt product prepared in the step (S3), and performing sensory evaluation and iodine and selenium content measurement. The measurement results are shown in table 3, and compared with the iodine and selenium contents of sample No. 4 in table 1 of example 1, the method can be used for changing the stirring mode and the drying mode of a spraying container of feed liquid under the condition that the selenium raw material and the addition amount of the selenium raw material are unchanged, wherein the samples at 3 sampling points all have the conditions of 30% of iodine loss and about 35% of selenium loss, and the analysis reasons are mainly that the feed liquid brings away the loss along with the air induction of equipment in the atomization spraying process, meanwhile, the materials collide and rub with each other in the fluidization drying process, and the fallen micro powder brings away the loss along with the air induction of equipment.
Table 3 fluidized bed preparation product evaluation
| Sample number | Sensory evaluation | Iodine mg/kg | Selenium μg/kg |
| 1 | Uniform and delamination-free | 17.5 | 2560 |
| 2 | Uniform and delamination-free | 17.3 | 2615 |
| 3 | Uniform and delamination-free | 16.8 | 2645 |
Comparative example 2
The iodized selenium-enriched edible salt comprises the following components in parts by weight: 997 parts of edible salt, 1 part of dry powder of cardamine cordierite, 1 part of water, 0.05 part of potassium iodate and 0.01 part of ferric ammonium citrate; the granularity of the dry powder of the cardamine cordierite is 200 meshes, and the selenium content is 4000mg/kg.
The preparation method comprises the following steps:
S1, accurately weighing all raw materials for later use;
s2, completely dissolving potassium iodate and ferric ammonium citrate in water for standby;
S3, taking 20 parts of the weighed edible salt, and uniformly stirring the edible salt and the solution prepared in the S2 to form a premix A for later use;
S4, taking 20 parts of the weighed edible salt, and uniformly stirring with the dry powder of the cardamine cordierite to form a premix B for later use;
S5, adding the rest 957 parts of edible salt into a mixing stirrer for stirring, wherein the rotating speed of a blade of the mixing stirrer is 25r/min, adding the premix A prepared in the step S3 into the mixing stirrer, stirring for 10min, adding the premix B prepared in the step S4, and stirring for 5min to obtain the finished product of the iodized selenium-enriched edible salt.
According to the method, the adding amount of water is respectively changed into 2 parts, 3 parts and 4 parts, the adding amount of other components and the preparation method are unchanged, and finished products of the iodized selenium-enriched edible salt with different adding amounts of water are prepared, and sensory evaluation, iodine and selenium content measurement and storage evaluation are carried out, and the storage is carried out in a 50 ℃ oven and in a 200KG squeezing storage. The evaluation results are shown in Table 4, when the water addition amount is 1 part, the finished product can visually fall off powder and delaminate, and the selenium content difference of samples at different sampling points can be confirmed through the detection value of selenium; when 2 parts of water is added, the finished product is uniform, the whole product has a certain color difference, after the product is stored in a 50 ℃ oven for 90 days for test, layering powder falling phenomenon occurs, and the difference of the selenium content of samples at different sampling points is obvious; while 3 parts and 4 parts of the sample were added to water, and caking occurred in the 200KG press storage test.
Table 4 evaluation of dry blended prepared products
Comparative example 3
The iodized selenium-enriched edible salt is prepared from the following raw materials in parts by weight: 997 parts of edible salt, 1 part of dry powder of cardamine cordierite, 0.4 part of Arabic gum, 1.5 parts of water, 0.05 part of potassium iodate and 0.01 part of ferric ammonium citrate; the granularity of the dry powder of the cardamine cordierite is 200 meshes, and the selenium content is 4000mg/kg.
The preparation method comprises the following steps:
S1, accurately weighing all raw materials for later use;
S2, completely dissolving the Arabic gum, potassium iodate and ferric ammonium citrate in water for standby;
S3, taking 20 parts of the weighed edible salt, and uniformly stirring the edible salt and the solution prepared in the S2 to form a premix A for later use;
S4, taking 20 parts of the weighed edible salt, and uniformly stirring with the dry powder of the cardamine cordierite to form a premix B for later use;
S5, adding the rest 957 parts of edible salt into a mixing stirrer for stirring, wherein the rotating speed of a blade of the mixing stirrer is 25r/min, adding the premix A prepared in the step S3 into the mixing stirrer, stirring for 10min, adding the premix B prepared in the step S4, and stirring for 5min to obtain the finished product of the iodized selenium-enriched edible salt.
And randomly sampling 3 points of the prepared iodized selenium-enriched edible salt, and performing sensory evaluation, iodine and selenium content measurement and storage test. The evaluation results are shown in Table 5, and the aqueous solution of acacia gum with the adhesive effect is added, and the ordinary premixing mode is adopted due to the viscosity of the solution, so that the premix is not uniform, the final finished product is not uniform, and the local caking phenomenon occurs in the storage process of the product.
TABLE 5 evaluation of gum arabic+dry blend preparation products
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (3)
1. The iodized selenium-enriched edible salt is characterized by comprising the following components in parts by weight: 991-999 parts of edible salt, 0.5-3 parts of dry powder of cardamine cordierite, 0.2-0.6 part of Arabic gum, 0.030-0.065 part of potassium iodate and 0.01-0.02 part of ferric ammonium citrate;
The preparation method comprises the following steps:
S1, completely dissolving potassium iodate and ferric ammonium citrate in water to form a solution with the concentration of 10wt% of potassium iodate, spraying the solution into continuously stirred edible salt at the spraying pressure of 2kg/cm 2 and the speed of 40-50ml/min at the temperature of 45-55 ℃, and continuously stirring for 5min after the spraying is finished to obtain iodized salt;
S2, sieving the dry powder of the cardamine violifolia through a 200-mesh sieve, mixing the dry powder with a 7.5wt% Arabic gum aqueous solution to obtain paste with the cardamine violifolia concentration of 15wt%, spraying the paste into the iodized salt obtained in the step S1, and spraying compressed air with the pressure of 4kg/cm 2 to obtain the iodized selenium-enriched salt;
And S3, drying the iodized selenium-enriched salt obtained in the step S2 at 50-60 ℃ until the moisture is less than 0.08wt%, and continuously turning the material in a self-gravity type for 5-10 times per minute in the drying process to ensure that the material is heated uniformly, thus obtaining the iodized selenium-enriched edible salt finished product.
2. The iodized selenium-enriched edible salt according to claim 1, which is characterized by comprising the following components in parts by weight: 997 parts of edible salt, 1 part of dry powder of cardamine cordierite, 0.3-0.4 part of Arabic gum, 0.042-0.05 part of potassium iodate and 0.01-0.02 part of ferric ammonium citrate.
3. The iodized selenium-enriched edible salt according to claim 1 or 2, wherein the dry powder of the cardamine violifolia is obtained by cleaning a cardamine violifolia plant, soaking the cardamine violifolia plant in ethanol to remove chlorophyll, freezing the cardamine violifolia plant at a temperature of between-40 ℃ and-50 ℃, quickly heating the cardamine violifolia plant to 40 ℃ to 50 ℃ for sublimation, dehydration and drying, and then superfine grinding the cardamine violifolia plant to 200 meshes to 1000 meshes.
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