海蜇产品中铝含量3种测定方法的比较  

Comparison of three methods of aluminum determination in jellyfish product

作　　者：吴则业 杨贤庆[1] 岑剑伟[1] 魏涯[1] 赵永强[1] 黄卉[1] 周婉君[1] 

机构地区：[1]中国水产科学研究院南海水产研究所国家水产品加工技术研发中心农业部水产品加工重点实验室,广东广州510300 [2]上海海洋大学食品学院,上海201306

出　　处：《食品与发酵工业》2015年第3期204-208,共5页Food and Fermentation Industries

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(2013YD01);农业部水产品加工重点实验室开放基金(NYJG201309);广东省农业标准化研究项目(2130109-10-1)

摘　　要：海蜇中因加工过程添加大量的明矾而含有较高的铝含量,文中通过比较EDTA滴定法、火焰原子吸收法和电感耦合等离子体发射光谱法(ICP-AES)对海蜇中铝含量的测定结果,找出准确测定海蜇中铝含量的方法,同时做精密度和回收率实验。取即食海蜇和盐渍海蜇样品各15个,采用湿法消解完毕后,以3种检测方法进行测定。结果表明:3种检测方法的测定结果没有显著性差异(P>0.05),用3种检测方法测定即食海蜇和盐渍海蜇的相对标准偏差均小于5%;除了在即食海蜇铝含量的检测中,EDTA滴定法和火焰原子吸收法测定的回收率分别为86.10%、88.50%较低外,其他测定的结果都达到了较高的回收率。EDTA滴定法和火焰原子吸收法测定的检出限分别为7.4、3.5 mg/L。因此,EDTA滴定法及火焰原子吸收法适用于企业及检测机构对海蜇中铝的测定。Aluminum content in jellyfish is high due to adding of aluminum in the processing to improve the products quality. An accurate method to detect aluminum content in jellyfish was studied by comparing of several existing methods such as : EDTA titration method,flame atomic absorption and inductively coupled plasma emission spectrometry( ICP-AES). The precision and recovery rates were carried on. Fifteen desalted jellyfish and fifteen salted jellyfish were tested respectively. After wet digestion,three different detection methods were applied. The results showed that there was no significant difference in the final results( P > 0. 05). ALL three methods’ relative standard deviations were less than 5%. The recovery of desalted jellyfish was 86. 10% and 88. 50% respectively determined by EDTA titration method and flame atomic absorption. The recoveries of others were all higher. The detection limit was 7. 4mg / L and 3. 5 mg / L of EDTA titration method and flame atomic absorption spectrometry. EDTA titration method and flame atomic absorption method can be used for determination of aluminum content in jellyfish by enterprises and inspection agencies.

关 键 词：海蜇 铝 EDTA滴定法 火焰吸收法 ICP-AES法 

分 类 号：TS254.7[轻工技术与工程—水产品加工及贮藏工程]