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星虫微量元素含量的测定 总被引：10，自引：0，他引：10
用原子吸收光谱法全面系统地对星虫肉中微量元素含量进行分析测定、评价星虫肉中的微量元素的含量。结果表明,样品中营养元素Mg、Ca、Fe、Zn、Se等含量丰富,而有害微量元素,如As、Pb、Cd等含量低。为星虫的经济价值、营养价值以及药用功能的进一研究和开发利用提供了重要依据。 相似文献
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采用火焰原子吸收光谱法对大嶝海域牡蛎鳃和肚腹中微量元素的含量进行测定,同时用加标回收法检验方法的可靠性。研究结果表明,牡蛎含有丰富的微量元素,鳃中Cu、Zn、Mn、Fe的含量分别为15.35±0.36μg/g、72.86±1.12μg/g、11.39±0.76μg/g、40.07±0.40μg/g;肚腹中Cu、Zn、Mn、Fe的含量分别为5.37±0.40μg/g、41.93±0.81μg/g、6.74±0.34μg/mg、24.89±0.53μg/mg。牡蛎鳃中Cu、Zn、Mn、Fe的含量均高于肚腹。用原子吸收方法测定牡蛎中微量元素的效果较好,回收率为89.0%～102.5之间,相对标准偏差在1.4%以下。 相似文献
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本文建立了微波消解-电感耦合等离子体质谱(ICP-MS)同时测定贝类产品中Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Se、Mo、Ag、Cd、Ba、Hg、Tl和Pb等16种金属元素含量的方法.采用微波消解法对样品进行消解,通过在线加入内标校正基体效应,利用ICP-MS测定贝类产品中16种金属元素的含量.测定元素校正曲线的相关系数均在0.9992以上,检出限为6.64× 10-4 ～0.0851 μg· L-1.对牡蛎样品平行测定6次,各元素相对标准偏差(RSD)均小于5％.利用该方法分析了标准参考物质扇贝(GBW10024)中的16种金属元素,其测定值与参考值吻合.该方法具有快速、简单、精密度和准确性良好等优点,适用于贝类产品多种金属元素的同时测定. 相似文献
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在水温(18±0.5)℃下,利用生物化学方法测定施氏鲟Acipenserinae schrenkii胚胎发育过程中微量元素的含量,分析胚胎发育进程与微量元素含量的关系,为稚、幼鱼及亲鱼培育的营养需求量和饲料配制提供参考。结果显示:胚胎发育过程中,Fe、Mn、Cu、Zn含量的变化规律与代谢高峰期各不同。Fe含量呈先降低-升高的变化趋势,孵出期最高(18.12mg/kg);Mn含量先降低后升高,受精卵期含量最高(1.04mg/kg);Cu含量的高峰期分别为卵黄栓期、心搏期、孵化早期和孵出期,含量分别为1.66mg/kg、1.95mg/kg、1.83mg/kg和1.93mg/kg;卵裂期Zn含量最高(10.86mg/kg);视泡期微量元素的含量最低。 相似文献
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三峡水库小江流域消落区土壤重金属时空分布与来源分析 总被引：4，自引：0，他引：4
2010年3-9月对小江流域消落区5个断面的土壤重金属含量进行监测.结果表明,2010年小江流域消落区土壤Cu、Zn、Pb、Cr、Fe和Mn均值分别为28.90、72.73、23.58、20.70、35.58×103和517.14 mg/kg.土壤综合污染指数为0.99,污染等级处于警戒级.小江消落区土壤重金属含量沿程分布以高阳站点较低,黄石站点较高,且大部分重金属含量随高程升高总体呈现升高的趋势.时间分布上以3月和7月各重金属均值含量较高.与2009年相比,2010年消落区土壤重金属Fe、Mn和Zn含量有所降低,Cu和Pb含量有所增高.利用相关性分析和因子分析对5种重金属的相关性和来源进行解析,结果表明Fe、Mn与其他重金属相关性显著(P＜0.05或P＜0.01),而Cu和Pb也显著相关(P＜0.01),Cr与Fe、Mn之外的重金属的相关性都较弱,初步推断Fe、Mn和Zn属于“自然因子”类别元素,Cu和Pb属于“污染因子”类别元素. 相似文献
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首次对革丽靬金鳟肌肉中的微量元素进行了测定分析,结果表明,革丽靬金鳟肌肉中Cu、Mn、Fe、Zn和Se五种微量元素的含量分别为2.381±0.605mg/L、1.067±0.461mg/L、15.465±4.822mg/L,11.127±1.289mg/L和0.095±0.017mg/L,并通过与大麻哈鱼以及草鱼、鲤鱼、鲫鱼等常规养殖品种的相应成分比较,说明革丽靬金鳟是一种微量元素含量丰富、营养价值更高的鱼类。 相似文献
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2010年3-9月对小江流域消落区的5个断面的土壤重金属含量进行监测。结果表明,2010年小江流域消落区土壤Cu、Zn、Pb、Cr、Fe、Mn均值分别为28.90、72.73、23.58、20.70、35.58*103、517.14 mg/kg。土壤综合污染指数为0.73,污染等级处于警戒级。小江消落区土壤重金属含量沿程分布以高阳站点较低,黄石站点较高,且大部分重金属含量随高程升高总体呈现升高的趋势。时间分布上以3、7月各重金属均值含量较高。与2009年相比,2010年消落区土壤重金属Fe、Mn 、Zn含量有所降低,Cu、Pb含量有所增高。利用相关性分析和因子分析对5种重金属的相关性和来源进行解析的结果表明,Fe、Mn与其他重金属相关性显著（P<0.05或P<0.01）,而Cu、Pb之间也显著相关（P<0.01）,Cr与Fe、Mn之外的重金属的相关性都较弱,初步推断Fe, Mn, Zn属于“自然因子”类别元素,Cu、Pb属于“污染因子”类别元素。 相似文献
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为了探究鱼类不同组织中矿物元素的含量，实验以养殖黄颡鱼为对象，采用电感耦合等离子体质谱法测定了黄颡鱼18个组织(心脏、肝脏、脑、脾脏、肾脏、肌肉、脂肪、前肠、中后肠、眼睛、鳃、尾鳍、鱼鳔、骨骼、胃、皮肤、血液、全鱼)中7种矿物元素(Ca、Mg、Zn、Fe、Cu、Mn和Se)的含量与分布。结果显示，Ca在骨骼、鳃、尾鳍和肌肉中占比较高，在尾鳍和骨骼中含量最高，在脂肪组织中含量最低；Mg在骨骼和肌肉中占比较高，在骨骼和尾鳍中含量最高，在眼睛中含量最低；Zn在骨骼、肌肉、皮肤和眼睛中占比较高，在眼睛中含量最高，在脂肪组织中含量最低；Fe在骨骼、血液和肌肉中占比较高，在血液中含量最高，在脂肪组织中含量最低；Cu在骨骼、肌肉和肝脏中占比较高，在肾脏和肝脏中含量较高，而在脂肪和眼睛中含量最低；Mn在骨骼和肌肉中占比较高，在骨骼和尾鳍中含量较高，在眼睛和脂肪中含量较低；Se在肌肉、骨骼、皮肤和肝脏中占比较高，在脾脏、肝脏、肾脏和前肠中含量较高，在肌肉和脂肪中含量较低。研究表明，黄颡鱼体内含有丰富的矿物元素(Ca、Mg、Zn、Fe、Cu、Mn、Se)，而且在不同组织中具有不同的分布特征。研究采用ICP... 相似文献
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人工养殖史氏鲟畸形原因探讨 总被引：2，自引：2，他引：0
采用原子吸收分光光度法,对骨骼畸形和体型正常的人工养殖史氏鲟脊椎、骨板、鳍条、鳃、肝脏、肾脏、肌肉中锰、铜、铁、镉、铅、锌等的含量进行了检测,并对其分布和积累规律进行了研究。结果表明,畸形和正常史氏鲟身体各部位中重金属的含量无显著性差异(P>0.05),重金属积累不是造成人工养殖史氏鲟畸形的主要原因。畸形和正常人工养殖史氏鲟体内重金属的分布和积累规律基本一致,锰和铅主要分布在脊椎、骨板、鳍条和鳃等骨化组织中;铁和铜在体内主要蓄积在肝脏中;锌和镉在体内的分布较均匀。 相似文献
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Artemia salina cysts (San Francisco Bay Brand) were exposed in seawater containing multiple concentrations of either a single heavy metal (Hg, Cu, Zn, Pb, Cd, Co, Ni, Cr, Mn and Fe) or combination of heavy metals. The heavy metal accumulation in Artemia nauplii increased linearly with an increase in the heavy metal concentration in water. The metals could be detected in nauplii exposed to a single heavy metal at dosages of 5 μg/L for Hg, Zn, Mn, Fe and Cu; 25 μg/L for Cd and Cr; 50 μg/L for Co; 100 mUg/L for Ni; and 250 μg/L for Pb. Cysts exposed to several heavy metal combinations had minimum effective dosages equal to or lower than the single heavy metals- 5 μg/L for Cu, Cr, Zn, Mn and Fe; 25 μg/L for Cd and Ni; 50 μg/L for Co; and 250 μg/L for Pb. The accumulation of Cu, Ni and Co by Artemiu nauplii did not differ for animals exposed to single or combined heavy metal solutions. Cr, Zn and Pb had a synergistic effect of heavy metal uptake in combined heavy metal element solutions, however, Fe, Cd and Mn had an antagonistic effect. 相似文献
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A survey was made on the content of nine trace metals in waters of 12 predetermined coastal stations in the Island of Penang, Malaysia, with the object of establishing mussel culture farms in the near future. The results indicated low concentrations of these trace elements except for Cr and Ni, which ranged from trace level to 35 ppm and BDL (below detectable level) to 2.07 ppm, respectively. These values are slightly above the upper limits (Cr, 0.05 and Ni, 1.0 ppm) set by the national Division of Environment, Ministry of Science, Technology and Environment, under the Environmental Quality (Sewage and Industrial Effluents) Regulations 1978.Investigations on tissue level bioaccumulated trace metal contents in mussel from an experimental culture farm indicated BDL values for As in all tissues, Cd highest in the intestines and stomach (6.24 ppm), Co in the mantle (59.85 ppm), Cr in the siphon (1869.85 ppm), Cu in the mantle (23.94 ppm), Fe in the intestines and stomach (218.82 ppm), Mn in the style (365.28 ppm), Ni in the mantle (23.94 ppm), Pb in the mantle (279.3 ppm) and Zn in the style (152.2 ppm). However, culture experiments at 10 ppm concentration stresses of the different trace elements over a 48-h period did not result in a similar tendency in tissue bioconcentration, except for Cd (378.35 ppm) and Fe (419.66 ppm) in the intestine and stomach, and Mn (748.5 ppm) in the style. Co was highest in the style (187.35 ppm), Cr in the gill (2924.91 ppm), Cu in the gill (457.22 ppm), Ni in the intestines and stomach (222.44 ppm), Pb in the gill (1897.2 ppm), and Zn in the mantle (1077.73 ppm).Short-term stress studies over a 48-h period with trace metal concentrations ranging between 10 and 300 ppm indicated the patterns of biodeposition for Cd, Cr, Co, Pb, Mn and Zn to be closely related even though their toxicity levels varied. Cu indicated a bioaccumulation maximum after 12 h of incubation followed by a regulatory mechanism, while Fe and Ni demonstrated a drastic spiked absorption after 6 h exposure followed by the normal trend of biodeposition as observable for the other trace metals. The biodeposition factors at most instances, were highest for the 10 ppm concentration cultures of 48 h. 相似文献
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赤水河主要经济鱼类重金属含量及风险评价 总被引：2，自引：0，他引：2
为了解赤水河鱼体重金属富集现状及其潜在的生态风险和食品安全,测定了赤水河茅台江段和赤水江段的黄颡鱼(Pelteobagrus fulvidraco)、蛇鮈(Saurogobio dabryi)和大口鲇(Silurus meriordinalis)肌肉和肝脏中的重金属含量。分别使用电感耦合等离子体原子发射光谱法测定Cu、Zn、Pb、Cd、Fe、Cr和Mn的含量,原子荧光光度法测定As和Hg的含量。结果表明:大口鲇肌肉中Cu、Zn、Pb、Cd、Fe、Cr和Hg的含量高于黄颡鱼和蛇鮈,3种鱼类肝脏中的重金属含量均高于肌肉。所有鱼体肌肉中的重金属含量均低于国家标准,但大口鲇肌肉中Pb和Cd的含量高于欧盟委员会标准。危害指数分析表明:赤水河野生鱼类食用的人体健康风险较小。重金属单因子污染指数的结果表明赤水河鱼体Pb和Cd的污染程度较高,赤水河存在潜在的重金属污染风险。 相似文献
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The concentrations of 14 mineral elements (Na, K, Ca, P, Mg, Fe, Zn, Cu, Mn, Co, Cr, Ni, Cd and Pb), together with pH, moisture, ash and NaCl content, were determined in 38 feeds commonly available in Europe for trout (starter, fingerling, grower, brood), salmon (starter, fingerling, grower), eel (grower), and larval fishes.Large differences in the mineral composition, particularly the trace elements Fe, Zn, Cu, Mn, Co and Pb, exist within and between the different feed categories tested. The results obtained are discussed in the context of available information on the dietary mineral requirements of these fish species. 相似文献
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Mineral contents of the muscle tissue and the digestive gland of Octopus vulgaris during short‐term starvation 
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下载免费PDF全文 We used spectrometry to study variation in the contents of minor (B, Cu, Fe, Mn and Zn) and major essential elements (Ca, K, Mg, Na and P) in the muscle tissue and digestive glands of Octopus vulgaris after 1, 2, 4 or 8 days of starvation and in fed controls. The contents of the major essential elements remained constant during 8 days of starvation. Na was the principal element found in both tissues, followed by K, P and Mg. The contents of the minor essential elements were higher in the digestive gland than in the muscle tissue, with increased contents of Fe, Mn and Zn (p < .05) during starvation, confirming the high capacity of this organ to accumulate trace minerals. In muscle tissues, B, Fe and Mn contents were lower and Cu and Zn contents higher, in starved animals than in fed animals (p < .05). Significant negative correlations between the digestive gland index and the contents of Cu, Fe and Zn suggested that the loss of weight of the digestive gland during starvation is responsible for this increase in mineral concentration. This and further information on variation in mineral content will help to optimize performance of diets formulated for the octopus. 相似文献