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Formaldehyde background investigation and evaluation of the squid and their products

Author: HanHongWei
Tutor: WangMaoQi；NiFang
School: Disease Control and Prevention Center
Course: Public Health
Keywords: Squid Formaldehyde The value of the content of the background
CLC: R155.5
Type: Master's thesis
Year: 2008
Downloads: 82
Quote: 1
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Abstract


Formaldehyde is a toxic substance, and studies have shown that formaldehyde easy with cell nucleophilic substances react chemically to form compounds, leading to DNA damage, the international IARC has classified formaldehyde as a suspected carcinogen. However, formaldehyde is a normal product of cellular metabolism, widely exist in natural foods, meat, poultry, fish and fruits contain trace amounts of formaldehyde. Not many domestic aquatic products, especially the edible fish formaldehyde content of the background and Mechanism System reported. Therefore, accelerating the content of formaldehyde in the background in the aquatic products, distribution law and its Mechanism determine self formaldehyde aquatic species and amount, the use of risk assessment techniques, suited to China's aquatic products of formaldehyde limited indicators, meet market Supervision, Inspection and regulate aquatic production, sales practices is extremely urgent. After more than two years of research, the topic is basically clear the different origin of fresh (near the ocean), frozen squid (the Sea of ??Japan, the North Pacific, Peru sea) background contain formaldehyde, formaldehyde content of different parts of the body in squid changes formaldehyde content in the production process of silk products, dried squid products contain a certain amount of formaldehyde, and change with the storage time. HPLC and acetylacetone assay comparison and validation of the methodology, the two kinds of methods can be used for the determination of formaldehyde content in the aquatic, but for formaldehyde content <1mg/kg samples by high performance liquid chromatography with high accuracy. Second, the 25 kinds of aquatic products Determination of formaldehyde background where marine fish formaldehyde measured values ??of the background between 32.18-50.99mg/kg, formaldehyde background measured values ??in marine crustaceans 12.25-36.25mg / kg between the measured values ??of the background of the Shellfish formaldehyde 0.23-2.88mg/kg between mollusks formaldehyde determination of background values ??between 0.44-10.31mg/kg; 33 kinds of dried squid products were formaldehyde content The measured formaldehyde content in the 0.01-148mg/kg between. Third, the survey of sea (Zhoushan offshore, sea of ??Japan, the North Pacific Ocean, Peru sea) squid formaldehyde content and storage conditions of squid formaldehyde content, the different origin of squid, its formaldehyde content is basically the same; different specifications of squid little change in the content of formaldehyde; saved far squid fishing in -20 ° C cold storage freezing conditions the formaldehyde content remained the same; near ocean fresh squid formaldehyde content in a -20 ° C cold storage freezer storage conditions, as to save time , fresh squid formaldehyde content will be significantly increased, a basically stable; squid formaldehyde content of the different parts of the very different visceral> carcass> head, with a significant difference. , The survey of the formaldehyde content in various technological process of the squid silk production process changes, made a preliminary study of the mechanism of change in which the formaldehyde content; survey shredded squid the refined storage conditions under formaldehyde content, content significantly after one month increase after gradually increased with storage time.

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CLC: > Medicine, health > Preventive Medicine,Health > Nutrition, hygiene,food hygiene > Food hygiene and food inspection > Food hygiene and inspection
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