Method for removing arsenic in Porphyra haitanensis

A laver removal technology, applied in application, food preparation, food science and other directions, can solve problems such as restricting the export of laver products, excessive heavy metal content, affecting children's health, etc. The effect of high removal rate

Inactive Publication Date: 2010-06-30
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the rapid development of industrial and agricultural production in neighboring ports, the pollution of the offshore marine environment has become increasingly serious, resulting in frequent occurrence of excess

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put 5 grams of fresh seaweed into a conical flask, add 25 ml of deionized water, and then move the conical flask into an ultrasonic extractor. Under the conditions of an ultrasonic temperature of 35°C and an ultrasonic frequency of 25KHz, use ultrasonic waves for 0.5 seconds , with an interval of 0.5 seconds to ultrasonically treat the altar laver in the container. The total ultrasonic time is 10 minutes, and the altar laver with better removal effect can be obtained; at the same time, it can also remove some other heavy metals, such as chromium, cadmium and lead etc. In this embodiment, the ultrasonic temperature can also be 30° C. or 25° C., etc., and the total ultrasonic time can also be 15 minutes, etc.

Embodiment 2

[0014] It is basically the same as Example 1, except that the ultrasonic temperature is 45° C., and the total ultrasonic time is 20 minutes. The total time of ultrasound in this embodiment can also be 25 minutes or the like.

[0015] In the above-mentioned embodiment, the interval ultrasonic mode may also be ultrasonic for 0.3 seconds, pause for 0.7 seconds, or ultrasound for 0.6 seconds, pause for 0.4 seconds, etc.

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Abstract

The invention discloses a method for removing arsenic in Porphyra haitanensis. Fresh Porphyra haitanensis and deionized water are put into a container by weight-to-volume ratio of 4.5-5.5:25. The container is moved into an ultrasonic extractor. Ultrasonic treatment is conducted to the Porphyra haitanensis in the container under ultrasonic temperature of 25-45 DEG C and ultrasonic frequency of 25 KHz in a way that ultrasonic waves are emitted for 0.3-0.6 seconds at intervals of 0.7-0.4 seconds. The total time of the ultrasonic treatment is 10-25 minutes. Through the ultrasonic treatment under the conditions and in the way, the removal rate of the arsenic in Porphyra haitanensis can reach more than 60 percent, the residual arsenic in Porphyra haitanensis is lower than the value required by the national standard, and the harmfulness to the bodies of people, especially the bodies of children, is reduced. The method has the advantages that no pollution is caused to Porphyra haitanensis, the impact on the quality of Porphyra haitanensis is small, the removal time is short, the speed is fast and the removal rate is high.

Description

technical field [0001] The invention relates to a technology for removing heavy metals in food, in particular to a method for removing arsenic in laver. Background technique [0002] Altar laver (Porphyra haitanensis) belongs to Rhodophyta (Rhodophyta) Protoflorideophyceae (Protoflorideophyceae) Bangiaceae (Bangiaceae) Porphyra algae, is one of the two main species of artificially cultivated laver in my country. Porphyra laver has important edible and economic value, and it is also the main export characteristic agricultural product in my country's coastal areas. However, with the rapid development of industrial and agricultural production in neighboring ports, the pollution of the offshore marine environment has become increasingly serious, resulting in frequent occurrence of excessive levels of heavy metal elements (such as chromium, cadmium, lead and arsenic, etc.) in exported seafood, which has affected people, especially children. The health of the people also restrict...

Claims

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Application Information

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IPC IPC(8): A23L1/015A23L1/025A23L1/337A23L5/20A23L5/30A23L17/60
Inventor 王强阮晓江浩
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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