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interfering substance
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  干扰物质
     Interfering substance and it's elimination in color development were discussed.
     讨论了显色时干扰物质及其消除;
短句来源
     Analysis method of ammonia in coking wastewater by means of gas sensitive electrode was introduced in the paper and also were analysed the linear range,responvesponse time,reused ratio and interfering substance.
     研究了用气敏电极测定焦化厂废水中氨的分析方法,对测定的线性范围,响应时间、回收率、干扰物质等作了理论探讨和大量试验。
短句来源
     Analysis method of ammonia in coking wastewater by means of gas sensitive electrode was introduced in the paper and also were analysed the linear range,response time,reused ratio and interfering substance.
     研究了用气敏电极测定焦化厂废水中氨的分析方法,对测定的线性范围、响应时间、回收率、干扰物质等作了理论探讨和大量试验。
短句来源
     By this new method, photometric determination of the objective component can be done accurately in the presence of co existing interferences. In the WSRHPA method, several wavelength points which shows linear relationship are taken from the absorption spectrum of the interfering substance, and the H point standard addition method and also the K ratio H point standard addition method are taken as the criteria in the photometric analysis of multicomponent samples.
     全谱段 H点标准加入法 ,采用干扰物质吸收光谱图上多个成直线的波长点 ,以 H点标准加入法和 K比例 H点标准加入法为判据 ,测定多组分体系 ,并以水杨酸 -对硝基苯甲酸 -对氨基苯甲酸的不同混合物为例 ,对方法进行验证 ,结果满意。
短句来源
     Methods Suspension quantitative bactericidal test was adopted in which testing strain was diluted by distilled water and no interfering substance was added.
     方法采用以蒸馏水稀释试验菌、在试验中不引入干扰物质的悬液定量杀菌试验方法。
短句来源
  “interfering substance”译为未确定词的双语例句
     Compared with the group without organic interfering substance, both 50% calf serum and 1.5% albumin had slight influence on germicidal efficacy of sodium dichloroisocyanurate.
     与不含有机干扰物组比较,50%小牛血清和1.5%白蛋白对二氯异氰尿酸钠杀菌效果均有轻度影响。
短句来源
     Elimination of Interfering Substance in Determining Chlorion in Water
     水中氯离子测定时干扰物的消除
短句来源
     EXPERIMENTAL STUDY ON INFLUENCE OF ORGANIC INTERFERING SUBSTANCE ON GERMICIDAL EFFICACY OF CHLORINE-CONTAINING DISINFECTANTS
     有机干扰物对含氯消毒剂杀菌效果的影响研究
短句来源
     For resolving it, the proportion relation of masking agent and interfering substance (Fe, Al, Mg and Si) was analyzed, and the suitable content of masking agent was brought up also.
     根据硅、铁、铝等干扰组分与掩蔽剂反应的比例关系,分析计算出掩蔽剂的适宜加入量。
短句来源
     The organic interfering substance had certain influence on the efficacy of povidone iodine in inactivating virus.
     有机干扰物对聚维酮碘灭活病毒的效果有一定的影响。
短句来源
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  相似匹配句对
     On Substance
     论物质
短句来源
     Elimination of Interfering Substance in Determining Chlorion in Water
     水中氯离子测定时干扰物的消除
短句来源
     Interfering substance and it's elimination in color development were discussed.
     讨论了显色时干扰物质及其消除;
短句来源
     SUBSTANCE WOMEN
     “物质女人”辩
短句来源
     Theory of administrative interfering
     试论行政干预
短句来源
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  interfering substance
The choice of the wavelengths of spectral masks is substantiated, the accuracy and sensitivity to the presence of interfering substance are studied, and the influence of the mask instability is discussed.
      
Thus some strongly interfering substance in the water remains to be identified.
      
Detection of proteinous toxins using the Bio-Threat Alert system, part 3: effects of heat pretreatment and interfering substance
      
No significant interfering substance or ion suppression was identified for LSD, iso-LSD, and nor-LSD.
      
The casein has proved as an essential interfering substance and it was largely eliminated.
      
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In view of the necessity of a rapid and accurate process for the deter-mination of fluorine applicable in the analysis of sodium fluoride and otherfluorine compounds,the author has established a new volumetric processconsisting in the titration in aqueous-alcoholic medium with ferric nitrate asstandard solution and sodium salicylate as indicator.All of the methods,published by Guyot,Greeff,Fairchild andVisintin proposed for the determination of fluorine using ferric solutionas standard,are based on the reaction:6NaF+FeCl_3→Na_3FeF_6+3NaCl....

In view of the necessity of a rapid and accurate process for the deter-mination of fluorine applicable in the analysis of sodium fluoride and otherfluorine compounds,the author has established a new volumetric processconsisting in the titration in aqueous-alcoholic medium with ferric nitrate asstandard solution and sodium salicylate as indicator.All of the methods,published by Guyot,Greeff,Fairchild andVisintin proposed for the determination of fluorine using ferric solutionas standard,are based on the reaction:6NaF+FeCl_3→Na_3FeF_6+3NaCl. But the sodium ferric fluoride thus formed is fairly soluble in water and makesthe end-point unclear,therefore the titration can not be performed accurately.This seems to be due to the fact that the following two reactions advancesimultaneously,and accordingly the formation of sodium ferric fluoride is in-complete in aque(?)us medium:3NaF+Fe(NO_3)_3→FeF_3+3N_aNO_33NaF+FeF_3→Na_3FeF_6Nevertheless,these reactions,according to the author's experiments;proceedalmost quantitatively in meda.containing at least 50% by volume of alcohol.This paper reports the xperimental results obtained in the fundamentalstudies on the various factors influencing the accuracy of the volumetry,namely,the sensitivity and the necessary amount of sodium salicylate used asindicator,the pH value,the alcoholic concentration of the titration medium,the concentration of the fluoride taken for the determination and the timewhen alcohol should be added in the course of titration.Furthermore,a rapidvolumetric process with high accuracy is proposed together with its applicationsin ordinary analyses of sodium fluoride and other fluorine compounds.The proposed method is characteristic in using sodium salicylate asindicator,which shows sharp violet color with minute amount of ferric ion inmedium of pH 3 controlled with buffer solution,then titrating with standardferric nitrate,and adding proper amount of alcohol(the alcoholic concentra-tion at the end-point should be above 50%)during the titration,when themedium becomes orange yellow in color.The method may be summarized as follows:Take 5 ml of neutral sodiumfluoride solution of about 0.3 N in a small Erlenmeyer flask,add 2.5 mlof Walpole's buffer solution of pH 3(formed by dissolving 34.0 g ofcrystalline sodium acetate and 20 ml of 38% HCl in water,and making upto 250 ml)and 1 ml of 0.1 M sodium salicylate dissolved in 50% alcohol.After sufficient stirring,titrate with standard 0.3 N(0.05 M)ferric nitratesolution,using micro-burette until the medium becomes orange yellow,thisstep being reached after addition of about 4 ml of titrant.Then decolorizethe solution by adding 12.5 ml of absolute alcohol(or 13 ml of 95% alcohol),previously purified by redistillation with lime;stirring is necessary during theaddition.Further continue the titration until the light pink color formeddoes not fade after stirring for 30 seconds when observed over a white surface. In the analyses of sodium fluoride and other fluorine compounds con-taining interfering substances,such as divalent and polyvalent metallic ions,phosphate,silicate,borate,carbonate,sulfide ions and reductants acting on ferricion,it is necessary to separate fluorine from these interfering substances bythe distillation with sulfuric acid according to the method of Willard andWinter(20).Then the distillate is neutralized with dilute sodium hydroxideand adjusted to the proper pH with hydrochloric acid using p-nitrophenol asindicator.The solution is ready for titration as described.But in the caseof absence of these interfering substances except carbonate,for example,inthe determination of the concentration of sodium fluorde solution obtained bythe extraction of the crude product,produced industrially by fusing fluorsparwith sodium carbonate and silica,the above separation of fluorine by dis-tillation is dispensable.The anaIytical results obtained by the proposed method are in goodagreement with those obtained by the lead chlorofluoride process(8),whichis recognized as official method for the determination of fluorine in agriculturalproducts.

本文介绍一容量分析氟的新方法和在工业制品上的应用,并分析了一种工业制备的氟化钠液,所得的结果和氟氯化铅法所得的极为一致。对于影响该分析法准确度的各种因素:指示剂的灵敏度和滴定时适宜的用量、溶液的 pH 值、应加的乙醇量、操作中加乙醇的次序、以及氟离子的适宜浓度,均加以研究并找出适宜的情况。本法用硝酸铁为标准液,水杨酸钠作指示剂,在 pH=3左右作滴定;当溶液呈橙黄色时,加入适量的乙醇,使其浓度在终点时仍不低于50%。如有干扰物质如二价及多价金属离子、磷酸根、矽酸根、硼酸根、碳酸根、硫化物和还原物质可能与三价铁起作用者,均应分离之。

The colorimetric aniline method for the determination of pentoses of Traceyt was applied to the hydrolyzates of soil. Experimental tests showed no interfering substances in the color development after the treatment of hydrolyzates with CaCO_3 and cation exchange resin. Equimolar quantities of various pentoses do not give exact equal effects on color development. Since the pattern of pentoses probably is similar in different soils, the aniline method may give an approximate value of the total pentoses content...

The colorimetric aniline method for the determination of pentoses of Traceyt was applied to the hydrolyzates of soil. Experimental tests showed no interfering substances in the color development after the treatment of hydrolyzates with CaCO_3 and cation exchange resin. Equimolar quantities of various pentoses do not give exact equal effects on color development. Since the pattern of pentoses probably is similar in different soils, the aniline method may give an approximate value of the total pentoses content of soils.

叙述了測定土壤中五碳醣的方法。土壤水解液中的有机有色物貭、SO_4~=、Fe~(++)(Fe~(+++))、Ca~(++)等将对五碳醣的測定产生干扰。但用碳酸鈣和阳离子交换树脂处理水解液能够很方便地将所有干扰物貭除去。比較研究各种土壤的五碳醣含量时,以采用1N H_2SO_4—100℃—8小时的水解条件较为适宜。虽然不同五碳醣与苯胺試剂所生成的顏色产物的光密度有所不同,但考虑到各种土壤中五碳醣的組成可能差异不大,所以本法可以得出土壤中五碳醣总量的近似值。

The diphenylamine reaction, first explored by Dische in 1930, is still most frequently used for the estimation of DNA, based on the latter's sugar component. Various interfering substances have since been reported, most of which are naturally occurring contaminants, such as sugars, polysaccharides and certain proteins. During the course of our work, serious interference has been noted with various salts, frequently present in DNA solutions. According to the shape of the curves relating concentration to...

The diphenylamine reaction, first explored by Dische in 1930, is still most frequently used for the estimation of DNA, based on the latter's sugar component. Various interfering substances have since been reported, most of which are naturally occurring contaminants, such as sugars, polysaccharides and certain proteins. During the course of our work, serious interference has been noted with various salts, frequently present in DNA solutions. According to the shape of the curves relating concentration to interference and the changes in the absorption spectra, the substances investigated may be divided into three groups.

(1)DNA二苯胺反应受碱、盐类和高浓度的某些強酸的干扰,干扰作用都随浓度之增大而加強,但不同物貭的浓度-干扰曲綫不同,对显色产物的吸收光譜影响也不同。(2)卤化物中氯化物如NaCl、KCl、NH_4Cl、MgCl_2、MnCl_2以及HCl在最終浓度为0.1N时即可使显色值(600mμ)下降15%左右。NaF在0.25N以下对显色并无干扰。NaBr在0.05N,NaI在0.002N即可使显色值下降50%左右。卤化物对显色产物吸收光譜的影响除600mμ高峯下降之外还有520mμ新吸收高峯的出現。(3)一般鈉盐如Na_2SO_4、NaAc、NaOH、NaH_2PO_4、Na_2HPO_4、Na_3PO_4、柠檬酸鈉、三氯乙酸鈉皆对显色有显著干扰。但磷酸、柠檬酸、三氯乙酸则皆无干扰作用。这些鈉盐对显色产物吸收光譜的影响除600mμ高峯的下降外,还有480mμ新高峯的出現。(4)其它金属盐类如NH_4Ac、Mg(Ac)_2、(NH_4)_2SO_4、MgSO_4、ZnSO_4、MnSO_4也有不同程度的干扰作用。銨盐、鎂盐的作用都稍強于相应的鈉盐,对吸收光譜的影响則与一般鈉盐相类似。(5)強酸如H_2SO_4和HC...

(1)DNA二苯胺反应受碱、盐类和高浓度的某些強酸的干扰,干扰作用都随浓度之增大而加強,但不同物貭的浓度-干扰曲綫不同,对显色产物的吸收光譜影响也不同。(2)卤化物中氯化物如NaCl、KCl、NH_4Cl、MgCl_2、MnCl_2以及HCl在最終浓度为0.1N时即可使显色值(600mμ)下降15%左右。NaF在0.25N以下对显色并无干扰。NaBr在0.05N,NaI在0.002N即可使显色值下降50%左右。卤化物对显色产物吸收光譜的影响除600mμ高峯下降之外还有520mμ新吸收高峯的出現。(3)一般鈉盐如Na_2SO_4、NaAc、NaOH、NaH_2PO_4、Na_2HPO_4、Na_3PO_4、柠檬酸鈉、三氯乙酸鈉皆对显色有显著干扰。但磷酸、柠檬酸、三氯乙酸则皆无干扰作用。这些鈉盐对显色产物吸收光譜的影响除600mμ高峯的下降外,还有480mμ新高峯的出現。(4)其它金属盐类如NH_4Ac、Mg(Ac)_2、(NH_4)_2SO_4、MgSO_4、ZnSO_4、MnSO_4也有不同程度的干扰作用。銨盐、鎂盐的作用都稍強于相应的鈉盐,对吸收光譜的影响則与一般鈉盐相类似。(5)強酸如H_2SO_4和HClO_4在高浓度时也有干扰作用,而NaHSO_4、NaClO_4反无干扰作用,它們对吸收光譜的影响都是只有600mμ吸收高峯的下降,并无新的高峯出現。(6)除卤化物以外的一般盐类和碱的干扰作用,在浓度不超过1N的情况下,都可以用适当提高二苯胺試剂中硫酸含量的方法定量的予以消除。反应产物吸收光譜的形状也可完全恢复。用这种改进的試剂对DNA显色值的大小,对显色后的稳定性以及反应的特异性都影响不大,实际可用。上述高浓度強酸的干扰作用則可用先加碱中和的方法予以消除。(7)HClO_4可完全代替二苯胺試剂中的H2SO_4,DNA的显色值不变,HClO_4也同样有消除卤化物以外一般盐类以及碱对显色的干扰作用。(8)上述盐类、碱以及高浓度的强酸的干扰作用是应用二苯胺反应进行有关DNA定量中必須考虑的因素。

 
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