Table salt can be iodized, why not add iron, calcium and other trace elements to supplement the lack

The widespread use of iodized salt was around 1990, before the widespread use of iodized salt, only a few countries had sufficient iodine**, such as Switzerland, Australia, the United States, Canada, etc.

Salt fortification with iodine is a good way, and other people who don't eat salt always have to eat salt. As for why not fortify and add others, such as iron. Calcium and other elements, the main reasons are as follows:

1. Iodine deficiency is extremely common and harmful. As I said earlier, before iodized salt was widely used, iodine deficiency was more common and the impact was more serious. Not only hyperthyroidism, but also iodine deficiency can easily cause problems such as mental retardation and stunting in newborns.

In comparison, the degree of deficiency of other nutrients and the harm of deficiency are relatively good, and attention is relative.

2. The daily requirement of iodine is low. The iodine requirement is about 200 micrograms, which is easily fortified with table salt. Calcium, magnesium, and iron are required in large quantities, and it is not practical to fortify them with salt. Calcium, for example, requires more than 1 gram per day and is not easily fortified with salt.

3. Sensory quality reasons. Some nutrients, especially metallic elements, have their own strange tastes. For example, iron and zinc, fortified with salt, have a taste problem.

However, now that food fortification technology has improved, such as food fortification through organic iron, it has little impact on taste. In fact, there is also table salt that is fortified with iron, but it is not widely available.

4. Technical issues. Fortification of nutrients should maintain the stability of nutrients, and some nutrients fortified into table salt cannot ensure the stability of nutrients during storage and use. For example, some nutrients are particularly unstable when moist and cannot be fortified in table salt.

Iodine is an indispensable trace element in the human body, plays a very important metabolic role in the body, the human body can not do without iodine, salt iodization is internationally recognized as the leading measure for the prevention and treatment of iodine deficiency diseases.

Because if you add it, it will become a toxic factor, and it is not suitable for people to eat.

Iodine deficiency is extremely common and harmful, and fortified nutrition should maintain the stability of nutrients.

Due to the high salt intake of Chinese residents, the incidence of chronic diseases such as hypertension in China is also increasing. In order to cooperate with the national salt reduction action and avoid excessive intake of salt by residents, the "Standard for the Use of Food Nutrition Enhancers" (GB14880-2012) has cancelled the use of salt as a nutritional enhancer (that is, calcium, iron, zinc, selenium, etc.) carriers mentioned by the subject.

Iodine and table salt together produce something that is good for the human body.

Iodine is different. First of all, people's iodine needs are measured in micrograms, and the amount added to salt is very small, which does not affect the use of salt. Second, the amount of iodine that people consume from food has little to do with the diet, and is almost exclusively determined by geography.

That is, for an iodine-deficient area, all people do not get enough iodine from food. For a given area, the amount of iodine that needs to be supplemented can be estimated with relative accuracy. Considering that people's appropriate iodine intake is a relatively large range, by iodizing salt in the table, it is basically possible to achieve that the vast majority of people do not lack iodine and will not consume too much.

The incidence of chronic diseases such as hypertension in China is also increasing. In order to cooperate with the country's salt reduction action, residents should avoid excessive salt intake

Iodine is added in the form of potassium iodate.

Iodized salt refers to those that contain potassium iodate (KIO3) and sodium chloride (NaCl). The World Health Organization recommends a daily salt intake of 6 grams per person, but Chinese nationals generally exceed 20 grams. This requires the provision of non-iodized salt as a choice, otherwise the risk of excessive iodine intake is extremely high.

Iodized salt refers to table salt that contains sodium chloride of potassium iodate. Since most areas of China are deficient in iodine, and iodine deficiency will cause iodine deficiency diseases, the state compulsorily adds a small amount of iodized salt to the sodium chloride table salt for consumption.

2 3 of the iodine in the body is present in the thyroid gland, which controls metabolism, which in turn is affected by iodine. Therefore, if iodine is insufficient, it may cause mental retardation, body fatness, and lack of energy. Goiter has long been reported by Chinese scholars, and China is one of the first countries in the world to use seaweed** for this disease.

Iodine was proposed by Courtois in 1811. Most of the dietary iodine is converted to iodide in the gastrointestinal tract, where it is almost completely absorbed by the body, and after entering the bloodstream, it is distributed in extracellular fluids throughout the body. The kidneys are the excretory organs of iodine.

Although the amount of iodine ingested by the human body is small, the kidneys do not have the ability to retain iodine. A small amount of iodine is also excreted through the feces. On May 15 every year, the National Day for the Prevention and Control of Iodine Deficiency Diseases is held to promote that eating iodized salt can effectively prevent iodine deficiency diseases.

Potassium iodate, which is more stable than potassium iodide in nature, is not easy to decompose and sublimate. It can prevent goiter and mental problems, but it is ...... to eat in coastal areasOn the contrary, it is easy to nodulate.

In the earliest days, we also added potassium iodide. However, the biggest weakness of potassium iodide is that it is unstable and easily destroyed. For example, when exposed to sunlight or improper storage, iodine will sublimate and volatilize.

Putting salt in hot oil too early during cooking can destroy potassium iodide and significantly reduce the iodine content of iodized salt. However, the biggest advantage of potassium iodide is that it is not toxic, no sublimation, no toxicity when it enters the human body, whether it is heated in oil, or used at room temperature. Later, some experts suggested to the state that potassium iodide should be replaced with potassium iodate.

In China, salt is added, and the added substance is potassium iodide (ki).

Add potassium iodate yo big brother.

The situation of iodine deficiency in China is relatively common, and the most applicable, economical, and fundamental way to prevent and treat iodine deficiency diseases is salt iodization. The method of salt iodization can effectively increase the iodine content in the human body and prevent the occurrence of goiter. Through salt iodization, patients with large necks are now rare, thanks to salt iodization.

Therefore, the study of the determination of trace iodine in iodized salt is of great significance. We recommend the iodine selective electrode method to measure the iodine content in table salt, the specific configuration is: PI5100 main unit, iodine ion electrode IES-006I, T2132 temperature electrode, R2223 reference electrode, iodine ion standard solution, iodine ion strength modifier.

The iodine content is 20-50 mg kg. It should be 100 kilograms per kilogram in grams.

Chemical formula kio3

k%=127 (39+127+16*3)=approximate equal to) approximate equal to)

The atomic mass may be wrong.

The approach should be right.

At present, non-iodized salt has been developed, which is a refined salt that does not contain iodide in table salt.

Iodine is an important raw material for the synthesis of essential thyroid hormones, which affect the production, development and metabolism of the body. Iodine is found in nature and is mainly ingested by people from drinking water, food, vegetables, and the surrounding environment.

Excessive iodine can lead to diseases such as goiter and hyperthyroidism with high iodine, but the causes of thyroid disease are complex and related to the environment, diet, mood, etc., and iodine intake is only one of the factors. Two-thirds of the iodine in the human body is found in the thyroid gland, and insufficient or excessive iodine can lead to thyroid problems.