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Lead removal method for 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. In addition to the effect of less time

Inactive Publication Date: 2012-11-28
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • 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 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 restricts the export of laver products

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0011] 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 , Pause at intervals of 0.5 seconds to ultrasonically treat the laver in the container. The total ultrasonic time is 20 minutes, and the deleaded laver with good removal effect can be obtained; at the same time, some other heavy metals can also be removed.

[0012] In the above-mentioned embodiment, the interval ultrasonic method can also be ultrasonic 0.3 seconds, pause 0.7 seconds, or ultrasonic 0.6 seconds, pause 0.4 seconds, etc.; the ultrasonic temperature can also be 30°C, 25°C or 45°C, etc.; the total ultrasonic time can also be 15 minutes or 25 minutes.

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Abstract

The invention discloses a lead removal method for porphyra haitanensis, which includes that fresh porphyra haitanensis and deionized water in weight volume ratio of 4.5-5.5:25 are placed in a container, the container is moved to an ultrasonic wave exactor for performing ultrasonic treatment on the porphyra haitanensis with the ultrasonic lasting time of 0.3-0.6 and interval of 0.7-0.4 sec and at the ultrasonic temperature of 25-45 DEG C and ultrasonic frequency of 25 KHz, and the total ultrasonic treatment time is 15-25 min; after the ultrasonic treatment with specific conditions, the lead removal rate of porphyra haitanensis can reach more than 92%, and the lead residual quantity of porphyra haitanensis is lower than the national standard requirement, the harmfulness to people on having porphyra haitanensis, in particular to children is reduced; besides, the lead removal method has no pollution to porphyra haitanensis, has slight influence on the quality of porphyra haitanensis, shorter removal time, high speed and higher removal rate.

Description

technical field [0001] The invention relates to a technology for removing heavy metals in food, in particular to a method for removing lead from 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 restricts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L1/337A23L1/015A23L17/60A23L5/20
Inventor 王强阮晓江浩
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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