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微波消解ICP-MS同时测定海产品中的15种元素含量 总被引:3,自引:0,他引:3
采用微波消解一电感耦合等离子体质谱(ICP-MS)法测定海产品中V,Cr,Mn,Fe,Co,Ni,Cu,Zn,As,Se,cd,Sn,Hg,Tl,Pb等15种元素的含量,以Re元素为内标,利用其回收率对以上15种元素的测定结果进行校正.对各元素的线性关系良好(r=0.999 1~1.000 0),检出限为0.28~1105μg/L,利用该方法分析了标准参考物质TORT-2和DORM-2,测定值与参考值吻合较好.对虾样品平行测定5次,各元素的RSD均小于5%,该方法的精密度和准确性良好.并以该方法分析测定了8种海产品中15种元素的含量.该方法可以用来进行海产品的质量控制和安全评价. 相似文献
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随着经济社会的发展,近几年沿海地区消费者对于海产品的需求不论从数量上还是质量上都有显著变化,这将直接影响到我国的海产品资源利用以及海产品消费市场。为了研究浙江省杭州市居民的海产品消费特征,通过对578位杭州居民的访谈与调查,研究他们的海产品消费行为与消费特征。研究结果表明:在杭州市场上,海产品已逐渐成为大众化的消费品;品质是消费者购买海产品时最为关心的因素;海产品消费渠道日益丰富;消费者需求呈现多样化;海产品营销体系还有待完善。根据调研结果,文章为进一步促进杭州市海产品消费提出建议:一是加强消费者引导;二是加强市场监管;三是优化销售渠道;四是促进加工业发展。 相似文献
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电白县位于广东省西南部,濒临南海,有着宽广的海域,在2227平方公里的总面积中,近海面积就占了1047平方公里,浅海面积42.4万亩,分别相当于陆地总面积和耕地总面积的一半。 海洋水产是电白的优势产业,1987年以来,全县海捕产量和外海生产能力连续10年居全省第一。进入90年代,特别是党的十四大以来,在邓小平理论的指引下,我们借鉴国内外沿 相似文献
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Acidic oligosaccharide sugar chain (AOSC), a D-mannuronic acid oligosaccharide, derived from brownalgaepolysaccharide, has been completed Phase I clinical trial in China as an anti-Alzheimer's Disease (AD) drug candidate. The identification of AOSC-binding protein(s) in neurons is very important for understanding its action mechanism. To determine the binding protein(s) of AOSC in neurons mediating its anti-AD activities, confocal microscopy, affinity chromatography, and liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis were used. Confocal microscopy analysis shows that AOSC binds to SH-SY5Y cells in concentration-, time-, and temperature-dependent fashions. The AOSC binding proteins were purified by affinity chromatography and identified by LC-MS/MS analysis. The results showed that there are 349 proteins binding AOSC, including clathrin, adaptor protein-2 (AP-2) and amyloid precursor protein (APP). These results suggest that the binding/entrance of AOSC to neurons is probably responsible for anti-AD activities. 相似文献
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A total of 328 yeast strains from seawater, sediments, mud of saltems, the guts of marine fish and marine algae were obtained. The results of routine identification and molecular methods show that five yeast strains obtained in this study belonged to Pichia spp., including Pichia guilliermondii luv-small, Pichia ohmeri YF04d, Pichiafermentans YF12b, Pichia burtonii YF11A and Pichia anomala YF07b. Further studies revealed that Pichia anomala YF07b could produce killer toxin against pathogenic yeasts in crabs while Pichia guilliermondii luv-small could produce high activity of extracellular inulinase. It is advisable to test if Pichia ohmeri YF04d obtained in this study is related to central-venous-catheter-associated infection. 相似文献
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在分析智能航运对下一代航海产品需求的基础上,介绍了基于S-100新一代数字航海产品体系的整体框架和主要内容,从产品规范、数据生产、软件开发、体系融入等4个维度分析了其发展趋势,指出了其在产品规范成熟度、双重模式、产品互操作等3个方面面临的问题,提出了基于S-100发展我国新一代海洋测绘产品体系的相关建议。在对标国际和结合国内实际的基础上,从参与产品规范开发、官方S-100产品生产、标准体系升级换代、海道测量产业链建设等4个方面提出了具体措施。本文可为建设我国新一代数字海洋测绘产品体系提供重要参考。 相似文献