Technology for making cryopreservation and preservation agent for crab and shrimp
2018-05-25 01:00:57
Crabs and shrimps often have some or all of their lives as a result of changes in their living conditions during the entire period of storage and marketing from the time they are caught on the market to the market, causing economic losses. Although there are currently low-temperature, oxygenated and other live storage methods, the effect is not ideal, and the death of crabs and shrimps is still serious.
This article describes the preparation of the active agent is magnesium sulfate, calcium sulfate, magnesium bromide, potassium chloride and other salts formulated for live crabs, live shrimp and shellfish and other low-temperature live storage after harvest, in a certain period of time Crabs and shrimps that do not die will survive at low temperature. It is characterized by easy access to raw materials, simple preparation, long shelf life, which facilitates the distribution and expansion of markets and increases economic efficiency.
First, raw materials
(a) The magnesium chloride hexahydrate product is a white monoclinic crystal. Industrial products are often brownish and contain 45% to 50% of magnesium chloride. It is bitter and salty, deliquescent, soluble in water and ethanol. In the agent used as a disinfectant, magnesium chloride hexahydrate was used as the final product.
(b) Potassium chloride is a colorless cubic crystal and often has a long columnar shape. Soluble in water, slightly soluble in glycerol, slightly soluble in ethanol, insoluble in ether and acetone. Agriculture is used as a fertilizer (containing 50% to 60% of potassium) and has a good fertilizer effect. In the agent used to maintain the osmotic pressure and acid-base balance of crab shrimp cells, to extend the life span.
(3) Magnesium sulfate is also known as bitter salt, diarrhea salt, and sulfur and bitterness. General industrial products are seven water substances. Colorless or white tetragonal columnar crystals. Odorless and bitter. Easy to weather in dry air. Soluble in water, slightly soluble in ethanol. In the agent is used to promote the elimination of intestinal poisons and anti-inflammatory of crabs and shrimps, in order to facilitate survival at low temperatures.
(d) Gypsum is usually referred to as raw gypsum. Also known as dihydrate gypsum, or calcium sulfate dihydrate. Monoclinic white powder. Soluble in acid, ammonium salt, glycerol, slightly soluble in water, insoluble in ethanol. In the agent, it uses its straightening effect on crab shrimp body to create conditions for low-temperature live storage.
(e) Magnesium bromide hexahydrate is a colorless and deliquescent crystal. Bitter, soluble in water, slightly soluble in ethanol. The use of its sedative effect in the agent creates conditions for the live storage of crab and shrimp.
(6) The main ingredient of salt is sodium chloride, which is divided into coarse salt and refined salt. In the agent for reducing the freezing point, the use of salt.
(seven) water tap water. For the preparation of mixed aqueous solution.
Second, the preparation method
(1) The use of various salts in the formula range (see table) is lower than the lower limit, which will weaken the vitality of crabs and shorten the live storage period, or they cannot be stored alive; exceeding the upper limit will lead to the death of crabs and shrimp and cannot be stored live. The actual amount can be increased or decreased according to the preparation test conditions.
(II) Operation According to the formulation amount, each component is added to water, and the mixture is evenly mixed. Then, the aqueous solutions of the components are mixed together and stirred and mixed evenly; after the components are fully mixed, the mixture is added into the water and the solution is stirred. Mix evenly, that is, too.
Third, the application of the effect of use: First, prepare a tank with oxygen supply device, into the preservation agent. Then, the temperature of the storage tank was adjusted to -20.2°C, and live lobsters were loaded and oxygen was supplied by air. Maintaining an average temperature of -2°C in the above temperature range enables the living preservation of shrimps, crabs, and shellfish.
The use of this agent, according to the above method and conditions, has a good effect on the storage of newly harvested live shrimp, live crabs and live seashells. The live crabs are stored for 70 days, and the lobsters are stored for 150 days. All of them can survive the storage period without death. The odors, taste, flesh quality and color of the stored crabs, shrimps and sea shells are all good, and the body plumpness can still remain unchanged.
This article describes the preparation of the active agent is magnesium sulfate, calcium sulfate, magnesium bromide, potassium chloride and other salts formulated for live crabs, live shrimp and shellfish and other low-temperature live storage after harvest, in a certain period of time Crabs and shrimps that do not die will survive at low temperature. It is characterized by easy access to raw materials, simple preparation, long shelf life, which facilitates the distribution and expansion of markets and increases economic efficiency.
First, raw materials
(a) The magnesium chloride hexahydrate product is a white monoclinic crystal. Industrial products are often brownish and contain 45% to 50% of magnesium chloride. It is bitter and salty, deliquescent, soluble in water and ethanol. In the agent used as a disinfectant, magnesium chloride hexahydrate was used as the final product.
(b) Potassium chloride is a colorless cubic crystal and often has a long columnar shape. Soluble in water, slightly soluble in glycerol, slightly soluble in ethanol, insoluble in ether and acetone. Agriculture is used as a fertilizer (containing 50% to 60% of potassium) and has a good fertilizer effect. In the agent used to maintain the osmotic pressure and acid-base balance of crab shrimp cells, to extend the life span.
(3) Magnesium sulfate is also known as bitter salt, diarrhea salt, and sulfur and bitterness. General industrial products are seven water substances. Colorless or white tetragonal columnar crystals. Odorless and bitter. Easy to weather in dry air. Soluble in water, slightly soluble in ethanol. In the agent is used to promote the elimination of intestinal poisons and anti-inflammatory of crabs and shrimps, in order to facilitate survival at low temperatures.
(d) Gypsum is usually referred to as raw gypsum. Also known as dihydrate gypsum, or calcium sulfate dihydrate. Monoclinic white powder. Soluble in acid, ammonium salt, glycerol, slightly soluble in water, insoluble in ethanol. In the agent, it uses its straightening effect on crab shrimp body to create conditions for low-temperature live storage.
(e) Magnesium bromide hexahydrate is a colorless and deliquescent crystal. Bitter, soluble in water, slightly soluble in ethanol. The use of its sedative effect in the agent creates conditions for the live storage of crab and shrimp.
(6) The main ingredient of salt is sodium chloride, which is divided into coarse salt and refined salt. In the agent for reducing the freezing point, the use of salt.
(seven) water tap water. For the preparation of mixed aqueous solution.
Second, the preparation method
(1) The use of various salts in the formula range (see table) is lower than the lower limit, which will weaken the vitality of crabs and shorten the live storage period, or they cannot be stored alive; exceeding the upper limit will lead to the death of crabs and shrimp and cannot be stored live. The actual amount can be increased or decreased according to the preparation test conditions.
(II) Operation According to the formulation amount, each component is added to water, and the mixture is evenly mixed. Then, the aqueous solutions of the components are mixed together and stirred and mixed evenly; after the components are fully mixed, the mixture is added into the water and the solution is stirred. Mix evenly, that is, too.
Third, the application of the effect of use: First, prepare a tank with oxygen supply device, into the preservation agent. Then, the temperature of the storage tank was adjusted to -20.2°C, and live lobsters were loaded and oxygen was supplied by air. Maintaining an average temperature of -2°C in the above temperature range enables the living preservation of shrimps, crabs, and shellfish.
The use of this agent, according to the above method and conditions, has a good effect on the storage of newly harvested live shrimp, live crabs and live seashells. The live crabs are stored for 70 days, and the lobsters are stored for 150 days. All of them can survive the storage period without death. The odors, taste, flesh quality and color of the stored crabs, shrimps and sea shells are all good, and the body plumpness can still remain unchanged.