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铅和铜
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  pb and cu
     Determination of trace Pb and Cu in food with microwave dispelling-atomic absorption spectrophotometry
     微波消化──原子吸收光谱法测定食品中铅和铜
短句来源
     SEPARATION AND DETERMINATION OF CyDTA CHELATES OF Bi Fe Pb and Cu BY REVERSED-PHASE IONPAIR CHROMATOGRAPHY
     铋铁铅和铜-CyDTA螯合物的反相离子对色谱分离和测定
短句来源
     Pot experiments were conducted to study the effect of amendment (functionalized monolayer material, MP-MCM-41) on cole growth and the forms of heavy metals in soil polluted by Cd, Pb and Cu.
     采用盆栽试验,研究了改良剂(无机功能材料,MP-MCM-41)对重金属镉、铅和铜污染土壤油菜生长及土壤重金属各形态分布特征。
     The effect of processing on the Pb and Cu pollution of tea was studied in this paper.
     研究了初制加工对茶叶铅和铜污染的影响。
短句来源
     Determination of Cd,Pb and Cu in biological by anodic Stripping Voltammetry
     阳极溶出伏安法测定生物体中镉、铅和铜
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  “铅和铜”译为未确定词的双语例句
     Capillary zone electrophoresis(CZE)was used to determine of lead,cadmium and copper in milk powder In the solution(pH=4.0) containing 10mmol/L of benzylamine and 10mmol/L of glycolic acid. Sample was separated in 12 min,detected at 214nm by indirect UV absorption,and quantified externally.
     用毛细管区带电泳(CZE)法测定了奶粉中的镉、铅和铜,在10mmol/L苄胺、10mmol/Lα-羟基乙酸、pH=4.0的电泳介质中,3种离子在12min内得到了分离,用间接紫外吸收法在214nm处进行检测,以外标法定量。
短句来源
     Capillaryzoneelectrophoresis(CZE)wasusedtodetermineLead,CadmiumandCopperinmilkpowder. Inthesolution(pH=4.0)containing10mmol/Lofbenzylamineand10mmol/Lofglycolicacid,3inonicsampleswereseparatedin12min,detectedat214nmbyindirectUVabsorption,andquantifiedexternally.
     用毛细管区带电泳(CZE)法测定了奶粉中的镉、铅和铜,在10mmol/L苄胺,10mmol/Lα-羟基乙酸,pH=4.0的电泳介质中,3种离子在12min内得到了分离,用间接紫外吸收法在214nm处进行检测,以外标法定量。
短句来源
     The method was used for the determination of contents of zinc, cadmium, lead and copper in blood samples from 3 types of cancerous patients with RSD of 2.9%~3.3%(n=6). The recoveries of spiked samples were 98%~110% for the method.
     用该法测定了3种癌症病人血液中的锌、镉、铅和铜 ,相对标准偏差为2.9 %~3.3 %(n=6) ,加标回收率为98 %~110 % ;
短句来源
     Elimination of Memory Effect in Determination of Lead and Copper by GFAAS
     石墨炉原子吸收光谱法测定铅和铜中记忆效应的消除
短句来源
     Simultaneous determination of trace zinc、cadmium、lead and copper in waste water by square wave stripping voltammeter
     方波溶出伏安法同时测定废水中微量的锌、镉、铅和铜
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  相似匹配句对
     LEAD
    
短句来源
     COPPER
    
短句来源
     Within the layer the copper?
     ?
短句来源
     Centrifugal Pouring for Copper-lead Alloy Bearing Shell
     轴瓦的离心浇注
短句来源
     Test Research on Copper-lead Separation
     分离试验研究
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  pb and cu
grayanus began to accumulate Pb and Cu after certain threshold concentrations of these metals (60 and 150 μg/g respectively) in fine fractions of sediments was reached.
      
Presl heavy metals species (Cd, Pb and Cu) were assayed by differential pulse anodic stripping voltammetry and diffusive gradient in thin films.
      
The results showed that the competition affected the behavior of heavy metal cations in such a way that the soils adsorbed less Cd and Hg, and more Pb and Cu with increasing total metal concentrations, regardless of the molar concentration applied.
      
As the applied concentrations increased, Pb and Cu adsorption increased, while Cd and Hg adsorption decreased.
      
The results suggest that Hg and Cd have higher mobility associated to the lower adsorption and that Pb and Cu present the opposite behavior.
      
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Simultaneous determination of trace Copper and Lead by crown ethers methyl iso-butyl ketone extraction system-atomic absorption spectrometry method is studied.The determination of Copper and Lead in human hair or Chemical agent is carried out by using this method. The method is rapid, simple and sensitive, determination limit may be ppb level, the ava rage percentage recovery is the renge from 90 to 105%, and the relative standara deviation is 2%.

本文研究了冠醚—MIBK萃取体系—原子吸收法连续测定微量元素铜和铅。本方法用于人发和试剂中铅和铜的测定,简单快速,效果良好,灵敏度高,铜为几个ppb,铅为几十个ppb,回收率在90~105%之间,变动系数为2%,完全可满足日常分析要求。同时也扩大了冠醚的应用范围。

229 soil samples and 327 vegetable samples were coll cted in vegetable-growing region of Shanghai in 1981-1982.The average Cd content in soil increased 2.7 times (maximum value was 13.5mg/kg)and 67.3% for Zn,56.6% for Cu,44.6% for Pb, 20.4% for Cr and 22.7% for Hg as compared with control region except for As. Simultaneously increased various heavy metals were found in contaminated soils. 95.4% of pair of element were significant correlation at 0.01 level in matrix of soil elements.Both control and vegetable-growing...

229 soil samples and 327 vegetable samples were coll cted in vegetable-growing region of Shanghai in 1981-1982.The average Cd content in soil increased 2.7 times (maximum value was 13.5mg/kg)and 67.3% for Zn,56.6% for Cu,44.6% for Pb, 20.4% for Cr and 22.7% for Hg as compared with control region except for As. Simultaneously increased various heavy metals were found in contaminated soils. 95.4% of pair of element were significant correlation at 0.01 level in matrix of soil elements.Both control and vegetable-growing region,in most cases,the content of heavy metal in spinach,potato,lettuce were higher where as cucumber,cabbage, watershoot were lower.The content of-Zn,As,Cr,Pb and Cu in vegetable normally were much less than tantatively allowed content. There were significant correlations in content of heavy metal between soil and greenvegetable except for As.In elements tested,the extratable percentage of Cd in soils was the highest and good correlation coefficient was obtained as far as soil and green- vegetable were concerned.The increase of heavy metals in soils was mainly caused by application of contaminated water and seawage sludge high in heavy metals.

1981~1982年在上海菜区采集了229个土壤和327个蔬菜样品。土壤中镉平均含量比对照医增加2.7倍(最高值为13.5毫克/公斤)、锌增加67.3%、铜56.6%、铅44.6%、铬20.4%和汞22.7%,砷与对照相近。污染土壤中多种重金属元素同时增高。在土壤元素相关矩阵中具有极显著意义(P<0.01)的元素对达95.4%.不论对照区或菜区,多数情况下,菠菜、马铃薯、莴苣各种重金属含量较高;黄瓜,甘蓝和茭白较低。蔬菜中锌、砷、铬、铅和铜的含量一般大大低于暂定容许含量。除砷外,青菜和土壤的重金属含量显著相关。在研究的七种元素中,土壤中镉的提取百分率最高,富集系数最大,青菜和土壤的相关系数最好。土壤中重金属含量的增加主要是应用受重金属污染的水及污泥。

Speciation of cadmium, lead and copper in polluted river water from-Xiawan section of Xiangjiang River was investigated using a modified REDEQL2 chemical equilibrium program. 12 metals and 12 ligands that form 134 complexes, 42 precipitates, 2 mixed solid precipitates, 5 oxidation-reduction reactions and adsorption of the metals on suspended solids -were considered according to water quality data collected during a period of 1982 to 1985. The precipitation diagrams were simulated and the comple-xation capacities,...

Speciation of cadmium, lead and copper in polluted river water from-Xiawan section of Xiangjiang River was investigated using a modified REDEQL2 chemical equilibrium program. 12 metals and 12 ligands that form 134 complexes, 42 precipitates, 2 mixed solid precipitates, 5 oxidation-reduction reactions and adsorption of the metals on suspended solids -were considered according to water quality data collected during a period of 1982 to 1985. The precipitation diagrams were simulated and the comple-xation capacities, conditional stability constants and adsorption constants were measured so as to derive the model input parameters. The calculated results, which were quite consistent with measured data, indicated that at pH 7.5-8. 0 the dominant species are precipitates and adsorbed forms and the dissolved species, including free ions and inorganic complexes, account, for less than 10% of metals in the system. As pH decreases, the fractions, of dissolved metals increase sharply.

研究了湘江霞湾江段重金属污染区内镉、铅和铜的形态分布化学平衡模式,该模式体系包括12种金属和12种配体,涉及134个络合反应、42个沉淀反应和2个混合固体沉淀、5个氧化-还原反应、3种金属在颗粒物上的吸附反应。模拟研究了重金属沉淀的边界和区域,实验测定了该江段河水与重金属的络合容量和络合物的条件稳定常数作为有机配体的计算参数,考察了该江段悬浮沉积物对重金属吸附的表面络合常数作为吸附反应的输入参数。计算得到了该江段不同站位镉、铅和铜的形态分布,其结果与形态分析实测和水质分析结果基本一致。

 
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