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Method for removing cadmium from porphyra haitanensis

A technology for removing laver, which is applied in application, food preparation, food science, etc., can solve problems such as restricting the export of laver products, excessive heavy metal element content, and affecting children's health, achieving fast speed, reducing hazards, and removing In addition to the effect of less time

Inactive Publication Date: 2010-06-16
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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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

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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 , with a 0.5-second interval ultrasonic method, ultrasonic treatment was performed on the Porphyra laver in the container, and the total ultrasonic time was 20 minutes, and Porphyra laver with good removal effect was obtained.

[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 etc.

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Abstract

The invention discloses a method for removing cadmium off porphyra haitanensis. The method is implemented by putting fresh porphyra haitanensis and de-ionized water in weight volume ratio of 4.5-5.5:25 into a container, moving the container into an ultrasonic extractor, and performing ultrasonic treatment to the porphyra haitanensis in the container in the interval ultrasonic way of using ultrasonic wave for o.3-0.6 seconds and pausing for 0.7-0.4 seconds with ultrasonic wave temperature being 25-45 DEG C and ultrasonic wave frequency being 25kHz; after the ultrasonic treatment with the above way and conditions, the removal rate of cadmium off porphyra haitanensis can reach above 63%, the residual quantity of cadmium in porphyra haitanensis meets the requirement of national standard basically, thus reducing harm to human bodies of people and especially children after eating, not causing contamination to porphyra haitanensis, having little influence on quality of porphyra haitanensis, less removal time, high speed and high 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 cadmium 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 阮晓王强江浩
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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