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微量碘     
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  trace iodine
     Among weak acid mediums,trace iodline has a remarkable catalytic effect on oxidative methyl violet decoloration reation of sodium periodate,by which dynamics photometry has been established for determining trace iodine in water,with lower detection limit 0.25μg/ml,and linear range 0.30μg/ml ̄0.80μg/ml.
     在弱酸性介质中,微量碘离子对高碘酸钠氧化甲基紫褪色反应具有显著的催化作用,以此建立了测定微量碘的动力学光度法。 方法检测限0.25μg/ml,线性范围0.30μg/ml~0.80μg/ml;
短句来源
     Determination of trace iodine in grain by sensitizing spectrophotometry
     增敏光度法测定粮食中微量碘
短句来源
     A spectrophotometry method for determining trace iodine in kelp has been developed.
     讨论了用碘 -淀粉体系分光光度法测定海带中微量碘含量的方法。
短句来源
     Determination of Trace Iodine in Human's Hair by ICP-AES
     ICP-AES法测定人发中微量碘
短句来源
     METHOD FOR RAPID DETERMINATION OF TRACE IODINE IN SEAWATER AND NATURAL WATER
     海水及天然水中微量碘离子快速测定法的研究
短句来源
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  micro-iodine
     Determining micro-iodine (Fe~(3+)CNS~-NO_2~-) in agricultural reconnaissance survey samples by using ion-exchange colorimetry
     离子交换—比色法测定农业地质普查样品中的微量碘(Fe~(3+)CNS-NO_2~-)
短句来源
     Based on the catalytic effect of micro -iodine on oxidizing decolorizati on of mocachite green by KIO4in NaH2PO4~Na 2HPO4solution,a method has been developed for the determination of micro -iodine by catalytic spectr ophometry. The maximum absorptitio n is at 610nm,the linear rang of determination is 0.21~1.50μg /mL. The detection limit is 6.1×10-8g /mL.
     在NaH2PO4~Na2HPO4介质中,微量碘对高碘酸钾氧化孔雀绿褪色有显著的催化作用,因此可用动力学分析法测定微量碘,该方法检出限为6.1×10-8g/mL,线性范围为0.21~1.50μg/mL.
短句来源
     Determination of Micro-iodine in Plant by HPLC
     离子对高效液相色谱法测定植物样品中的微量碘
短句来源
     An ion-exchange colorinmetry for determining micro-iodine in agricultural reconnaissance survey samples was studied. The detection limit of this method is 0.5×10~(-6), the precision comes to 2.4%.
     本文采用离子交换—比色法测定农业地质样品中的微量碘,本方法检出限为0.5×1-0 6,精密度达到2.4%。
短句来源
     The micro-iodine in plant was analyzed by HPLC with 150×4.6mm C18 column. The moblie phase was an ion-pairing agent(hexadecyltrimethyl ammonium bromide),buffer(0.1mol/L Na 2HPO 4∶0.1mol/L KH 2PO 4=1:1)and methanol(30/30/40,v/v/v). Delection wavelength was at 220nm.
     采用离子对高效液相色谱法测定植物中微量碘含量,150×4.6mmC18 柱,检测波长220nm ,以十六烷基溴化铵离子对试剂:磷酸盐缓冲溶液:甲醇(30:30 :40)为流动相,方法检测限达到5ng/μl,变异系数<2 .5% ,回收率在87% ~107% 之间。
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  micro iodine
     Rapid determination of micro iodine of iodized salt by FIA spectrophotometry
     FIA光度法快速测定加碘盐中的微量碘
短句来源
     Spectrophotometric determination of micro iodine in salt with naphthol green B
     萘酚绿B显色光度法测定盐中微量碘
短句来源
     Spectrophotometric determination of micro iodine in salt with methyl violet
     甲基紫显色光度法测定食盐中微量碘
短句来源
     Kinetic-Spectrophotometric Determination of Micro Iodine in Food With Metanil Yellow Oxidation by Potassium Bromate
     溴酸钾氧化酸性间胺黄动力学光度法测定食品中微量碘
短句来源
     Kinetic-Spectrophotometric Determination of Micro Iodine in Food
     动力学分光光度法测定食品中微量碘
短句来源
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  micro amount iodine
     Determination of Micro Amount Iodine in Water by Axially Viewed ICP AES
     端视ICP-AES法测定水中微量碘
短句来源
     Determination of Micro Amount Iodine in Salt by Inhibitory Catalytic Kinetic Spectrophotometry
     阻抑-催化褪色动力学光度法测定食盐中的微量碘
短句来源
     A new method for determining of micro amount iodine in water by axially viewed ICP AES was investigated.
     本 文利用端 视 I C P A E S法 测定水中 微量碘
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      trace iodine
    In the general case of trace iodine determination in quite different matrices the organic material is ashed prior to the precipitation and measuring step.
          
    The trace iodine content of several reference materials from NBS, BCR and IAEA obtained by this method is given.
          
    The temperature dependence of volatility loss of trace iodine was characteristic, and the feature was divided into three temperature regions.
          
    Determination of trace iodine in rock samples by epiterhmal neutron activation analysis involving rapid radiochemical separation
          
      micro iodine
    The BA-1 antibody of the IgM subclass was labeled with 131I by the micro iodine monochloride method at a 12:1 molar ratio and with 111In by the cyclic DTPA anhydride method at a 10:1 molar ratio.
          


    The semimicro method of Sill and Peterson for the iodometric determination of thallium, has been extended to macro scale by either one of the following means. Satisfactory results can be obtained.(1) Addition of 15-49 ml. of 1% gum arabic solution and 5-20 ml. of 95% alcohol to the solution to be titrated improves the accuracy of the method when the concentration of both Tl+ and Na2SaO8 are in the range 0.005-0.05 N.(2) addition of potassium bromide is more effective. The optimum conditions when the concentration...

    The semimicro method of Sill and Peterson for the iodometric determination of thallium, has been extended to macro scale by either one of the following means. Satisfactory results can be obtained.(1) Addition of 15-49 ml. of 1% gum arabic solution and 5-20 ml. of 95% alcohol to the solution to be titrated improves the accuracy of the method when the concentration of both Tl+ and Na2SaO8 are in the range 0.005-0.05 N.(2) addition of potassium bromide is more effective. The optimum conditions when the concentration of both T1+ and Na2S3O3 are in the range of 0.05--0.1 N are:(a) acid concentration-0.2-1.0 N in H2SO4 (final acid concentration)(b) potassium bromide-1.0-1.5 M (abt. 8-12 g KBr)(c) potassium iodide-0.0036-0.0055 M (abt. 0.04-0.06 g KI)(d) final volume-abt. 70 ml.

    采用下列两种指施之一可以扩大Sill利Peterson的半微量碘定量法测定铊的范围,适用于半微量及常量铊的测定,结果的准确度较原法有所提高。 (1)在被滴定溶液里加入阿拉伯胶和乙醇,在Tl~+和硫代硫酸钠溶液浓度为0.005—0.05N时,相应加入15—40毫升1%阿拉伯胶溶液和5—20毫升95%的乙醇。 (2)在被滴定溶液内加入溴化钾,在Tl~+和硫代硫酸钠溶液浓度为0.05—0.1N时,最宜条件是:酸度0.2—1.0N,H_2SO_4;溴化钾1.0—1.5M;碘化钾0.0036—0.0055M:滴定后体积约70毫升。

    Electron Spin Eesonance (ESR) of polyacetylene (PA) prepared with rare-earth coodination catalysts have been studied. The ESB spectra of PA are found to be singlet and Lorentz. No significant changes of PA ESB by catalyst systems composed of naphthenates of all fifteen rare earth elements are observed. It was found that the ESB linewidth, Ig N (N is the unpaired electrons concentration) exhibits a straight line with the cis content, with g=2.0028±0.0001. The formation of the unpiared electrons obeys the zero-order...

    Electron Spin Eesonance (ESR) of polyacetylene (PA) prepared with rare-earth coodination catalysts have been studied. The ESB spectra of PA are found to be singlet and Lorentz. No significant changes of PA ESB by catalyst systems composed of naphthenates of all fifteen rare earth elements are observed. It was found that the ESB linewidth, Ig N (N is the unpaired electrons concentration) exhibits a straight line with the cis content, with g=2.0028±0.0001. The formation of the unpiared electrons obeys the zero-order kinetics with the activation energy 11.3 kcal/mol. The lightly I2 doped rare-earth PA ESB retains singlet, Lorentz lineshape and g factor constant until I2 dopant concentration >2mol %, at which doped level the ESB signal disappeared.

    本文系统地研究了稀土聚乙炔的电子自旋共振(ESR)行为。发现稀土聚乙炔的ESR谱都为单线谱,符合Lorentz线型;十五种稀土环烷酸盐体系聚乙炔的ESR无明显区别,g因子为2.0028±0.0001;线宽(△H)和logN(N为未成对电子浓度)与聚乙炔的顺式含量成直线关系;未成对电子的形成服从零级动力学,其活化能为11.3kcal/mol;微量碘掺杂聚乙炔的ESR仍为单线谱、Lorentz型及g因子不变,碘掺杂浓度大于~2mol%时,没有ESR信号。

    A comparison is made between the alkali-ash method and acid-digestion methodfor iodine determination in urine.The results show that the acid-digestion methodis simple,quick and cheap.It also has high sensitivity and nice reproduction.The average recovery is above 90% and the coefficient of variation is 2.4%.Thesamples and standards are digested under the same test conditions and the resultis satisfactory.It can be widely used in county level laboratories.

    尿中微量碘的消解,通过碱灰化法和酸消化法比较,酸消化法操作简便,实验时间短,节约试剂器材,灵敏度高、重现性好,其平均回收率在90%以上,变异系数2.4%。而且实验样品与标准样品在相同条件下处理,结果满意,适合基层实验室应用。

     
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