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铅和镉     
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  lead and cadmium
     In this method the determination limit of Lead and Cadmium in vegetables is 0.002 mg/kg and(0.001 mg/kg) respectively and RSD is 0.1%~4.3% as well as returns-ratio of adding the sign is 98.0%~104%.
     该方法测定蔬菜中铅和镉的检出限为0.002 mg/kg和0.001 mg/kg,RSD为0.1%~4.3%,加标回收率为98.0%~104%。
短句来源
     The detection limits of lead and cadmium are respectively 22×10~(-7)g/l and 5.6×10~(-7)g/l.
     铅和镉的检出限分别为2.2×16-7g/L和5.6×10-7g/L.
短句来源
     For lead and cadmium, the relative standard deviation were 2.7-11.4% and 1.5-4.0%, the recoveries were 93.7-103% and 88.4-92.8% respectively.
     对于铅和镉,其精密度实验的相对标准偏差分别为2.7%~11.4%和1.5%~4.0%; 回收率分别为93.7%~103.0%和88.4%~92.8%。
短句来源
     The recoveries are 93.5%—106.0% and 94.0% —105.5% for lead and cadmium,respectively.
     标准加入法测定铅和镉的回收率分别为 93.5 %— 10 6 .0 %和 94 .0 %— 10 5 .5 %。
短句来源
     The peak of lead Was produced at the potential of-0.36V in pH3—4.Analysis results of wastewater of dairy industry:reclamation ratio of lead and cadmium were 94%—106.5% and 97%—103.5% respectively.
     在pH值为3—4范围内,铅的出峰电位为-0·36V.在正确是的条件下,对乳品废水中铅和镉的回收率分别为94%—106·5%和97%—103·5%.
短句来源
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  cadmium and lead
     Polarography was used for simultaneous determination of the cadmium and lead content in Zn/MnO_2 battery. In a medium of 2.4 mol/L hydrochloric acid solution, the first derivative waves were well resolved with the peak potential ( vs .SCE) -0.47 V for lead(Ⅱ) and -0.67V ( vs. SCE) for cadmium(Ⅱ),respercitively.
     在 2 4mol/L盐酸底液中 ,采用极谱法连续测定锌锰电池中的铅和镉 ,铅和镉的导数波峰电位分别在 -0 47V和-0 67V附近处 (vs .SCE) ,一次导数波的波形良好。
短句来源
     This paper investigates into the adsorption of cadmium and lead by dead bacteria cell in Nanhu Lake, Changchun City.
     研究了长春南湖水中生物膜上优势茵种细胞体对铅和镉的吸附规律,通过Freundlich和 Langmuir等温吸附曲线描述了生物膜吸附铅、镉的热力学过程。
短句来源
     With XanthanGum and Carbopol 940 as dispersant and NH4H2PO4 as chemical modifier, trace cadmium and lead of solid samples were directly determined by graphite furnace atomic absorption spectrometry(GFAAS) and their pyrolysis temperature can be reached 1000@ and 1100@ respectively.
     以黄原胶和CBP—1树脂为悬浮稳定剂和磷酸二氢铵作为基体改进剂用于石墨炉原子吸收分析(GFAAS),可将铅和镉的允许灰化温度分别提高到1100℃和1000℃。
短句来源
     The Study of Cadmium and Lead Toxicity on the Chinese Mitten-handed Crab, Eriocheir Sinensis
     铅和镉两种重金属对中华绒螯蟹的毒性效应研究
短句来源
     The new method of slurry sampling for direct analysis of trace cadmium and lead of solid materials by GFAAS was established and it can successfully be applied to analyze them in environmental and herbal medicine and biological samples.
     建立了悬浮进样-GFAAS直接测定环境、中草药、动物和植物样品内痕量铅和镉的新方法。
短句来源
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  ph and cd
     In this paper, a method is described for the determination of Ph and Cd in sea water using Zeeman GFAAS with HNO3 as a Matrix modifier.
     本文叙述以硝酸作基体改进剂,塞曼效应石墨炉原子吸收光谱测定海水中铅和镉的实验方法。
短句来源
  pb and cd
     Recoveries in the ranges of 95.3%~104.8% and 96.2%~105.5% were obtained for Pb and Cd respectively. RSD′s for lead was found to be in the range of 4.8%~7.2%, and for cadmium to be 4.3%~7.6%.
     铅和镉的回收率分别为 95 .3% 10 4 .8%和 96 .2 % 10 5 .5 % ,RSD分别为 4 .8% 7.2 %和 4 .3% 7.6 %。
短句来源
     The results obtained indicate the relative standard deviations for Pb and Cd (n=11) are 4.2% and 3.5% respectively and the recovery are 94%-106% and 92%-105% respectively.
     铅和镉的相对标准偏差 (n=11)分别为 4 .2 %和 3.5 % ,加标回收率分别为 94 %— 10 6 %和 92 %—10 5 %。
短句来源
     By this simple method, the recovery rates of both Pb and Cd were higher than 96%, the relative standard deviation was below 3.6%, and the minimum detectable traces of Pb and Cd were 0.27 nmol/L and 0.45 nmol/L, respectively.
     本法简便,快速,铅和镐的回收率均大于96%,相对标准偏整≤3.6%,铅和镉的最低检出量分别为0.27nmol/L和0.45nmol/L.
短句来源
     The adorption action of Sonchus oleraceus L for Pb and Cd was explored and the content of Ca,Mg,K,Na,Fe,Mn,Cu,Zn,Pb and Cd in Sonchus oleraceus L was determined by flame atomic absorption spectrophotometry.
     探讨了苦菜对铅和镉的富集作用,用火焰原子吸收光谱法测定了苦菜中Ca、Mg、K、Na、Cu、Zn、Mn、Fe、Pb、Cd元素的含量。
短句来源
     〔Methods〕After the samples were directly processed with physical method using the improving reagents of (NH 4) 3PO 4 and Mg(NO 3) 2NH 4NO 3,the trace elements of Pb and Cd in the samples were detected by the method of graphite furnace atomization.
     〔方法〕应用 (NH4) 3 PO4,Mg(NO3 ) 2 NH4NO3 基体改进剂 ,利用物理方法直接处理样品 ,横向塞曼石墨炉原子吸收光谱法直接测定样品中痕量铅和镉[1] 。
短句来源
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      lead and cadmium
    Electrothermal Atomic Absorption Determination of Trace Lead and Cadmium in Urine after Preconcentration and Separation from the
          
    It was found that, for a two-step atomizer, the maximum allowable mass of sodium chloride for which the background at lead and cadmium lines can be adequately compensated is 17-30 times higher than that for the commercial atomizer.
          
    Determination of lead and cadmium by atomic absorption spectrometry coupled with slurry sampling of carbonized samples: Use of p
          
    The RSD values were no higher than 8% for lead and cadmium in the ranges 0.3-3.3 and 0.110-1.34 mg/kg, respectively.
          
    Employment of Rhizobacteria for the Inoculation of Barley Plants Cultivated in Soil Contaminated with Lead and Cadmium
          
    更多          
      cadmium and lead
    Effects of cadmium and lead on phytochelatin accumulation in maize shoots and different root parts
          
    The space-time dynamics of absorbing atomic layers of cadmium and lead and molecular layers of zinc chloride in a commercially produced transverse-heated graphite atomizer and a newly developed two-step atomizer was studied.
          
    Effect of cadmium and lead adatoms on the reduction kinetics of peroxodisulfate anions at platinized platinum in acid solutions
          
    The reduction of peroxodisulfate anions on a rotating Pt/Pt disk electrode in solutions of sulfuric and perchloric acids with or without cadmium and lead salts is studied.
          
    Nonstoichiometry of sulfides of cadmium and lead is studied by the method of coulometric titration in electrochemical cells with sulfide-conductive solid electrolytes on the basis of MLn2S4.
          
    更多          
      ph and cd
    We tested their growth capacity related to pH and Cd concentration on synthetic and soil extract media.
          
    Cadmium extracted by ammonium nitrate after harvest of the crops was closely related with soil pH and Cd concentration in the plants.
          
    Sorption of trace cadmium on clay minerals and river sediments: effects of pH and Cd(II) concentrations in a synthetic river wat
          
    A differing sensitivity between the clones to both pH and Cd was found.
          
    The gas exchange of the clones was found to be affected by pH and Cd supply.
          
    更多          
      pb and cd
    The determination of Pb and Cd by electrothermal atomic absorption spectroscopy with the slurry sampling of carbonized samples into a graphite furnace was considered.
          
    In both pot and field experiments, seed bacterization improved the growth of barley plants and the uptake of nutrient elements from soil contaminated with Pb and Cd.
          
    The bacterization also prevented the accumulation of Pb and Cd in barley plants, thereby mitigating the toxic effect of these heavy metals on the plants.
          
    The arsine CE considerably increases at 2500-3000 A m-2and reaches 75-78% and 50-53% on Pb and Cd, respectively.
          
    Specific features of anion transfer in superionic conductors based on MF2 (M=Pb and Cd)
          
    更多          


    The differential capacity curves of Hg, Pb and Od electrodes in KCl, KBr and KI olutions were traced with the signal-carrying sweep method and the adsorption behaviors of myl lcohol and 9 surface active substances on these electrodes were investigated in 1 N KCl. It as ound that the sequence of surface activities of halide ions is the same on all three lectrodes Cl~-Pb>Cd. However,...

    The differential capacity curves of Hg, Pb and Od electrodes in KCl, KBr and KI olutions were traced with the signal-carrying sweep method and the adsorption behaviors of myl lcohol and 9 surface active substances on these electrodes were investigated in 1 N KCl. It as ound that the sequence of surface activities of halide ions is the same on all three lectrodes Cl~-Pb>Cd. However, the differences of otentials of desorption peaks (△φ_d. i. e. φ_脱 in Chinese Text) do not equal to the ifferences f potentials of zero charge (△φ_0). In fact, △φ_d. is not a constant, it decreases as the potential of esorption peak becomes more negative. The adsorption behaviors of surface active substances on different lectrodes could be explained by the difference of adsorption energies of water molecules.

    利用载波扫描法测量了汞、铅和镉在KCI,KBr,KI溶液界面上的微分电容曲线,以及1NKCI溶液中戊醇等十种典型有机表面活性物质在三种电极上的吸附行为.卤素离子在三种电极上的吸附活性,有着相同的顺序:Cl~-铅>镉. 我们发现,各种有机表面活性物质在三种电极上的脱峰电位之差既不等于零电荷电位之差,也不等于一个常数,而是当脱峰电位的值愈负时,脱峰电位之差就愈小.同一表面活性物质在三种电极上的吸附行为的差別,可能是由于被表面活性分子所排除的水分子在不同电极上的吸附功不同所引起的.

    This paper describes a series of glasses colored by lead compounds of S, Se, Te.Theseglasse can absorb the entire visible spectrum and show steep rise in transmission atwave lengths of 0.7~2.5μm in the near infrared region. It is observed that the forbidden band gaps of some semiconductors in glass are closeto those of corresponding crystals, and the location of frontage absorption of glass isdetermined by the energy required for the transition of electrons from valence band toconduction band. Glasses with steep...

    This paper describes a series of glasses colored by lead compounds of S, Se, Te.Theseglasse can absorb the entire visible spectrum and show steep rise in transmission atwave lengths of 0.7~2.5μm in the near infrared region. It is observed that the forbidden band gaps of some semiconductors in glass are closeto those of corresponding crystals, and the location of frontage absorption of glass isdetermined by the energy required for the transition of electrons from valence band toconduction band. Glasses with steep frontage at various wave lengthes in the near infraredregion are obtained by introducing PbX semiconductors into the glasses. During the process of heat treatment,the lead and cadmium chalcogenides in the glassform continuous solid solutions of which the forbidden band gaps are determined by com-positions of the aggregations just as in mixed crystals.

    本文叙述了用铅的硫、硒、碲化合物着色的玻璃系列。该类玻璃能吸收全部可见光,对于在0.7~2.5μm的近红外区域的各种波长具有陡峭上升的透过性能。 我们观察到若干半导体在玻璃中的禁带宽度很接近于晶体的禁带宽度,玻璃的前截止吸收位置决定于电子从价带跃迁到导带所需的能量。我们通过把PbX半导体引入玻璃作出了在近红外区不同波长处具有陡峭前截止边缘的玻璃。 在热处理过程中,玻璃中铅和镉的硫、硒、碲化合物将形成连续固溶体,其禁带宽度决定于聚集物的各种组成,正象在混合晶体中一样。

    This paper deals with the twin cell derivative polarography(TCDP)and the second derivative polarography(SDP).The TCDP can measure0.06μg/ml and the SDP can measure 0.1μtg/ml of lead and cadmium.Because of the excellent resolution,both methods can be used whenthe pattern is tilted by interference or when the shapes of the peaksare not desirable in the trace amount measerement.Both can give us a clearindication for the measurement.This largely widens the range in whichthe polarography measurement is used.Both methods...

    This paper deals with the twin cell derivative polarography(TCDP)and the second derivative polarography(SDP).The TCDP can measure0.06μg/ml and the SDP can measure 0.1μtg/ml of lead and cadmium.Because of the excellent resolution,both methods can be used whenthe pattern is tilted by interference or when the shapes of the peaksare not desirable in the trace amount measerement.Both can give us a clearindication for the measurement.This largely widens the range in whichthe polarography measurement is used.Both methods are convenient andswift to be used in the trace amount measurement of lead and cadmiumin NiO.

    本文研究了双池导数及二次导数示波极谱的测定方法。双池导数可测量0.09微克/毫升、二次导数可测量0.1微克/毫升的铅和镉.由于分辩率好,可用于图形受到干扰发生歪曲或微量测量时峰形较差的情况,此时均能给出明显的测量标志.用于氧化镍中少量铅与镉的测定.方法简便、快速。

     
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