Iodized salt distinguishes and the excessive danger of iodine

Iodized salt distinguishes and the excessive danger of iodine
Concept iodized salt of iodized salt means that contains iodine sour potassium ( KIO3) Sodium chloride (NaCl) . Because most areas of China lack the iodine, and will cause iodine deficiency (though the iodine is the microelement) when lacking the iodine ,So the country adds a small amount of iodized salt for sodium chloride salt eaten by force.
2/3 of the iodine exists in the thyroid gland in the human body, the thyroid gland can control the supersession, and the thyroid gland is influenced by iodine again. So, if the insufficient words of iodine, may cause intelligence to be slow in reaction, the body will become fat and vigor is insufficient. The scholar of our country has reported the goitrous disease for a long time, and our country is with the countries that treats this kind of disease of seaweed one of initially in the world. The iodine was 1811 Courtois was put forward. Most of iodine in the meal changes the not iodide in gastrointestinal tract, is nearly totally absorbed by the organism, distribute over the extracellular fluid of whole body behind entering blood. The kidney is a excretion organ of the iodine. Though there is little iodine quantity that the human body takes in, the kidney has not kept the function of iodine. A small amount of iodine is discharged through the excrement and urine too. National iodine deficiency prevent and cure day annual a May 15, propagate and wipe out iodized salt to prevent iodine deficiency from effectively.
The distinguishing, seeing packaging of iodized salt. Pack refined iodized salt with polyethylene plastics, print it with the iodine words and and indicate the production unit, date of production, the writing is clear, bag quality, print exquisitely, seal tightly and neatly; Imitate the writing of iodized salt fuzzily, packaging is coarse.
, think color and luster. The refined iodized salt appearance is pure white; It is yellowish to imitate the iodized salt appearance, or black dull, does not do, it is apt to be made moist.
, pinch with hands, the nose is smelt, the mouth is tasted. Hold refined iodized salt in hand, pinch more fluffily, the particle is even, without stink, saline taste is pure; False iodized salt hands are pinched into a group, apt to break up, the mouth tastes pained flavor, ammonia flavor heard.
We need the function of the iodine at first understand which main physiological functions iodine have? Discover main physiological functions of the iodine are usually finished through the thyroid gland, have not found yet the iodine has independent physiological functions. So under that iodine introduced is physiological function is functions physiological of thyroxine actually.
Promote the energy supersession: Promote the catabolism of the material, produce energy, maintain the basic life activity; Maintain the hypophyseal physiological function; Promote development: Puberty children's height, growth development and sex development of weight, skeleton, muscle depend on the thyroxine, if this stage lacks iodine, will lead to the fact children's development is bad; Promote brain development: In primary stage in development such as brain ' Since pregnant after the baby was born in 2 years old) ,People's nervous system development must depend on the thyroxine, if this period lacked iodine in the diet, will cause the baby's brain development to lag behind, the serious one is called " cretinism " on clinic ,And this course is irreversible, even supplement the iodine, can not return to normal either later.
Iodine scarce danger iodine deficiency is because the natural environment lacks the iodine, a series of damage of making the organism produce because of taking in the iodine insufficiently, except that common local goiter and one gram of two kinds of models in the intersection of spit of fland and disease of local characteristic display, also can lead to the fact, miscarry, stillbirth, congenital malformation and neonatal mortality increase, its main danger is brain development of influencing the foetus, cause children's intelligence and physical development obstacle, the intelligence causing the iodine to lack regional population is damaged.
The severity of iodine deficiency depends on the scarce intensity of the iodine, lack the intersection of iodine and the intersection of opportunity and the intersection of development and period (the intersection of foetus and issue, the intersection of neonate and one, the baby's infancy, adolescence or adulthood that body live in, and factors such as organism scarce compensation adaptive capacity to iodine,etc..
Iodine excessive the intersection of danger and the intersection of iodine and intaking amount it crosses a low to cause one to be iodine deficiency, but iodine excessive can health in organism cause influence too. The iodine takes in the excessive danger to the health and mainly includes the following several respect:
It was that the iodine causes goiter (IH) that the high iodine had the most common impact on thyroid gland function Overbearing with the high iodine first.
High iodine impact on intelligence iodine excessive to cause the attention of the experts and scholars in recent years only with relation between the intelligence. The intersection of epidemiology and investigation that launch reveal high the student's IQ, district of iodine, obviously lower than the right iodine district in crowd. Most the intersection of animal and experiment study, prove already even excessive iodine load can enable animal's brain weight lighten, study memory to drop, though the function not so scarce as the iodine of this kind of influence is obvious.
A research of impact on sex function of high iodine U.S.A. has revealed intaking amount and male sperm of iodized salt count, relate, may lead to the fact the man's sperm counts, reduces to brief on Americans' edible iodized salt. In addition, still have numerous reports of the excessive impact on great mouse's reproduction strength of iodine, this can't but be excessive worry of different class that enriches the iodine and is brought to us.
Determination of iodized salt add the intersection of iodine and the intersection of iodine and sour potassium that salt use, take a sample, add acid and KI solution, titrate with solution of starch and then, by colourless to happen, become getting blue as solution, record the intersection of starch and consumption and to be measured consumption of liquid in the cone-shaped bottle of solution, it calculate but content of I2,thus it last iodine content science of potassiums sour. We want edible iodized salt scientifically, in order to improve the utilization ratio of the iodine.
First of all, edible iodized salt is valued for insisting on. It is a chronic, daily and living course that the human body enriches the iodine, normal people should often edible iodized salt, had better eat everyday.
Secondly, iodized salt stores the method appropriately. Iodized salt should be stored in the glass or ceramic pot, added a cover and sealed putting in the low temperature shady and cool place. Meanwhile, iodized salt should not be stored for a long time, buy with the food at the same time. Iodized salt in the past mixed KI to make in the salt, but because KI was easy to be oxidized in the air, will cause the iodine to run off, and the price is relatively expensive, so our country does not add KI in the fixed salt from 1989, make a change to add iodine sour potassium ( KIO 3 ) . Iodine sour potassium is a kind of stronger oxidant, or meets the light in the airing will not be oxidized; And the intersection of iodine and sour potassium ionic crystal, boiling point high, have volatility, needn't be emphasized just with the salt while or eat before the pan appears at the stir-fry. Emphasize in some popular science articles iodized salt should be kept in shade, cook and avoid waiting with iodized salt late early, KI that mean come, speak, store these situation in as to the intersection of iodine and sour potassium in fact. Though iodized salt will not be oxidized in the air, for prevent from, reduce, should notice, had better seal and save compatriot iodine the intersection of intaking amount and on the high side salt that World Health Organization give a recommendation per person per day intaking amount 6 too, but Chinese people generally exceed 20 grams. This needs to offer the salt not sucking the iodine to be for people to choose at the same time, otherwise the iodine takes in the excessive danger great.
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