盐渍海蜇加工过程中铝的变化规律研究

Aluminum change regularity in the salted jellyfish processing

中文关键词:  盐渍海蜇  明矾  铝形态  变化规律

英文关键词:salted jellyfish  alumen  aluminum form  change regularity

中文摘要:

      目的 以鲜海蜇为原料, 研究三矾工艺加工盐渍海蜇过程中铝的含量及其形态变化, 为盐渍海蜇中铝的控制与安全性评价提供依据。方法 以溶液浸取法提取海蜇样品中不同形态的铝, 采用电感耦合等离子体质谱仪(ICP-MS)测定各形态铝的含量。结果 在加工过程中海蜇的总铝含量逐渐增加, 鲜海蜇、初矾、二矾、三矾海蜇中总铝含量分别为12.10 mg/kg、99.80 mg/kg、440.04 mg/kg、701.49 mg/kg; 海蜇中铝的主要形态为无机态铝, 有机态铝的含量较低, 鲜海蜇、初矾、二矾、三矾海蜇中无机态铝占总铝的比例依次为70.83%、79.41%、86.16%、93.10%; 无机态铝中大部分为沉淀态的Al(OH)3, 在海蜇样品中均占总铝含量的50%以上。结论 采用传统三矾工艺加工盐渍海蜇, 海蜇中铝的含量显著增加, 其中铝的形态主要为无机态。因此, 盐渍海蜇铝毒性的大小可直接用总铝含量来评价。

英文摘要:

      Objective The form and quantity change regularity of aluminum were detected in the step-wise jellyfish salting process with fresh jellyfish as raw material, so as to provide reference for the aluminum control and safety evaluation. Methods Different forms of aluminum in jellyfish specimens were extracted by the leaching method, and then the content of aluminum in specific form was analyzed by inductively coupled plasma mass spectrometry (ICP-MS). Results The total aluminum content increased gradually during salting process, which was reflected in the result of total aluminum in fresh jellyfish, primary alum jellyfish, second alum jellyfish and third alum jellyfish were 12.10 mg/kg, 99.80 mg/kg, 440.04 mg/kg and 701.49 mg/kg, respectively. Inorganic aluminum was the main aluminum form in jellyfish, and organic aluminum content was at a much lower level. In fresh jellyfish, primary alum jellyfish, second alum jellyfish and third alum jellyfish, inorganic aluminum proportions to total aluminum were 70.83%, 79.41%, 86.16% and 93.10%, respectively. Most of the inorganic aluminum existed as Al(OH)3 precipitate, whose proportion to total aluminum content was more than 50%. Conclusion The total aluminum content in jellyfish increased notably after the traditional step-wise salting process, and the aluminum mainly existed as inorganic form. Therefore the aluminum toxicity of salted jellyfish could be assessed by the total aluminum content directly.