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water sample
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  水样
     When the concentration of aniline was 30 ~ 40mg/L in water and pH was 3. 0 ~ 4. 0, 0. 3mL FeSO4(1.0mol/L), 2. 0mLK2C2O4(1. 0mol/L) and 1. 4mL3% H2O2 aqueous solution were added into the 100mL water sample;
     当水中苯胺浓度为30~40mg/L,pH30-40时,在100mL水样中投加0.3mL1.0mol/LFeSO4,2.0mL1.0mol/LK2C2O4和1.4mL3%H2O2溶液,UV灯下反应10min,均收到满意效果,对苯胺的去除率可达99%以上。
短句来源
     [Results] The copper concentration of the unknown water sample was 0.478 μg/ml,the expanded uncertainty was [WTBX]U95[WTBZ]=0.021 μg/ml(v eff=25)。
     结果某未知水样中铜浓度为:0.478μg/ml,扩展不确定度U95=0.021μg/ml(veff=25)。
短句来源
     the percent inhibition by AMHE in the water sample of Ba~(2+) concentration 185.1 mg/L is of 97.8% at dosage 12 mg/L and of 100% at dosage 15 mg/L;
     在Ba2+浓度为185 1mg/L的水样中AMHE的阻垢率,加量12mg/L时为97 8%,加量15mg/L时为100%;
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     The principle of the experiment is to join excessive K2Cr2O7 standard solution in water sample, the mixture of which reflux for 10 minutes while heating and boiling in strong acid, making K2Cr2O7 fully react with organic compound and reductive material,the reaction of which is K2Cr2O7-+ 14H++6e(?)
     实验的原理是:在水样中加入过量的K2Cr2O7标准溶液,在强酸性和加热煮沸下,回流10分钟,使K2Cr2O7与有机化合物和还原性物质充分作用反应为Cr2O72-+14H++6e(?)
短句来源
     The regression coefficients(r) were in the range of 0.994 4~0.991 1 except for naphthalene,which was 0.910 3.It was found that acenaphthene,phenanthrene and benzo [a] anthracene existed in the pure water sample and their concentrations were(1.4±0.2),(3.8±2.7) and(5.9±3.5) μg/L,respectively.
     在水样中检测到了苊、菲和苯并[a]蒽,它们的浓度分别为(1.4±0.2)(、3.8±2.7)和(5.9±3.5)μg/L。
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  水样品
     DETERMINATION OF ~(131)l AND ~(125)I IN ENVIRONMENTAL WATER SAMPLE
     环境水样品中~(131)I、~(126)I 的测定
短句来源
     This paper describes a method for determining ~(131)I and ~(125)Iin environmental water sample.
     本文介绍环境水样品中~(131)I、~(125)I 的测定方法。
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     Study on the Method for the Determination of Some Trace Elements in Soil and Water Sample by ICP-MS
     ICP-MS对土壤和灌溉水样品中部分微量元素的测定
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     Analysis of Trace Uranium and Plutonium in Environmental Water Sample by ICP-MS
     环境水样品中痕量铀与钚的ICP-MS分析
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     ACCURATE MEASUREMENT OF TRACE Pb AND Cd IN IMEP-6 WATER SAMPLE BY ISOTOPE DILUTION MASS SPECTROMETRY
     同位素稀释质谱法测定IMEP-6水样品中的痕量镉和铅
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  水质样品
     Importance of Pretreatment and Pretreatment Method of Water Sample
     水质样品预处理的重要性和几种分析指标的预处理方法
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     Total nitrogen in water and wastewater was determined by using flow injection online alkaline persulfate/UV digestion. The disposal method for different water sample were put forward. Linear range was 200-2000 μg/L, the detection limit was 5.6 μg/L, and the recoveries were 95.4%-102%.
     提出了不同水质样品的处理方法,采用流动注射碱性过硫酸盐紫外氧化方法在线测定水中的总氮,线性范围为200~2000μg/L,检出限为5.6μg/L,加标回收率为95.4%~102%。
短句来源
     By experiments,the importance and necessity of pretreatment of water sample has been analyzed scientifically,and pretreatment methods for monitored elements including NH_3-N,PCN,Cr~(6+)and Aniline-Nitrobenzene are introduced.
     从实验上科学的分析了水质样品预处理的必要性,并从理论和实践上介绍了NH_3-N,总氰、苯胺—硝基苯和六价铬几种监测要素的预处理方法。
短句来源
     The alkali hydroxide co-precipitation for low content water sample is employed to simplify the sample enrichment process and the monitoring sensitivity is improved.
     对低含量水质样品采用了碱金属氢氧化物共沉淀 ,简化了样品富集程序 ,提高了测试灵敏度
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     The phototactic index (Ip) of Daphnia decreased with increase of pollution degree in different water quality samples. The pollution indexes obtained from calculation based on Ip could reflect relatively well the pollution degree of water sample.
     在不同水质样品中,水溞趋光指数随污染程度的提高而降低,根据趋光指数计算得到的污染指数能较好地反映水样的污染程度.
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  “water sample”译为未确定词的双语例句
     Recovery rates of detected waste water sample with background concentration of 123 μg/L 1,1,1 trichloroethane added with additional 100 μg/L strandard 1,1,1 trichloroethane was 91%.
     对含 1 ,1 ,1 -三氯乙烷浓度为1 2 3μg/ L的废水加标 1 0 0 μg/ L,回收率为 91 %
短句来源
     The mice were treated with organic extracts through intraperitoneal injection at the doses of 25 L/kg, 12.5 L/kg, 6.25 L/kg, 3.125 L/kg water sample respectively for 3 consecutive days.
     以养殖污水有机提取物原液、1/2原液、1/4原液、1/8原液对小鼠染毒,分别相当于25、12.5、6.25、3.125L/kg,以DMSO为阴性对照,环磷酰胺(40mg/kg)为阳性对照,连续染毒3天。
短句来源
     The relative uncertainty and the expand uncertainty of the detection of hardness in the water sample were 0.008, 3 mg/L respectively. The expression of the uncertainty in the determination of hardness was (137±3)mg/L.
     水中总硬度测定的相对不确定度为0.008,扩展不确定度为3mg/L,不确定度的表达为(137±3)mg/L。
短句来源
     The results show that when the wastewater with toxic phenols from a coking plant is absorbed twice by organobentonite and activated carbon at room temperature,with 4.0 pH value and waste water flow velocity under 10 mL/min~12 mL/min,the removing rate of phenols,COD,oil,SS and color is 99.7%,99.5%,100%,100% and 99.8%,respectively,and the treated water sample can reach national discharge standard.
     结果表明,在室温、pH值为4.0及废水流速10mL/min ̄12mL/min的条件下,焦化含酚废水经有机膨润土和活性炭两次吸附处理后,酚、COD、油、SS及色度的去除率分别可达到99.7%、99.5%、100%、100%、99.8%,且处理后的水质基本达到了国家排放标准。
短句来源
     The concentration of SO42- was 37.0 mg/L in original water sample, and 80.0 mg/L in arsenic-removed water sample respectively.
     SO42-浓度在原水中为37.0mg/L,除砷后水中为80.0mg/L。
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  water sample
The As(III)/As ratio was 52.1% in the water sample, exceeding the national standard of 0.05 mg/L.
      
The removal efficiency and the variation of H2O2, Cl- formic acid, and oxalic acid were studied during the semi-batch ozonation experiments (continuous for ozone gas supply, fixed volume of water sample).
      
The accuracy of the procedure was verified by the added-found method with a water sample.
      
This method was applied to the determination of the μg/L level of lead, cadmium, and mercury ions in a water sample with good results.
      
The PCA/Au SAM gold electrode was used for the determination of Cu(II) in a tap water sample and the results showed a good agreement with the data obtained by atomic emission spectrometry.
      
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This communication reports the result of a study of Nelson method with thepurpose of being applied to the determination of nitrates in fresh waters. Accordingto our findings, firstly, a trace of copper sulfate should be added to the acetic acidin order to enhenco the sensitivity and roproducibility; secondly, nitrites should beremoved by using of sodium azide if it is present together with nitrate in the sample. The method may be summerized as follows: To 8 ml of water sample in a 15-ml centrifuge tube...

This communication reports the result of a study of Nelson method with thepurpose of being applied to the determination of nitrates in fresh waters. Accordingto our findings, firstly, a trace of copper sulfate should be added to the acetic acidin order to enhenco the sensitivity and roproducibility; secondly, nitrites should beremoved by using of sodium azide if it is present together with nitrate in the sample. The method may be summerized as follows: To 8 ml of water sample in a 15-ml centrifuge tube add 2 ml of acetic acid reagent A which contains 16.3 μg Cu~(++)in the form of copper sulfate. Then add 0.6 g of powder reagent, stopper, shake for1 1/2 min., and then centrifuge for 10 rain (4, 000 RPM). Pour the clear solutioninto an absorption cell and take reading colorimetrically with 515 mμ filter. The proposed method may be applied to samples containing nitrates as low as0.02 ppm and is more rapid and accurate than phenol-disulfonic acid process whichis recognized officially.

本文叙述水中微量硝酸盐的快速测定法。主要采用Bray之粉剂,加入硫酸铜作催化剂(Cu~(++)16.3微克/10毫升)和加长振荡时间控制硝酸盐的还原程度,致使灵敏度增加。用光电比色计可测至0.02 ppm硝酸根中之氮,用纳氏管可到0.005 ppm。再现性及稳定性均好。误差不超过5%。

1. The deuterium contents of two,bittern samples obtained from Chiaochou Bay in Tsingtao Locality and Kwangchou Bay in Chenkiang Locality were determined by float method. Sp. gr. of Shantung sample is 1.240 (28.0?Be') and that of Kwangtung sample is 1.260 (29.7° Be′). A sample:from Yellow Sea was chosen .as a standard for comparison.All determinations were carried out after normalization of O18 in the sample, by means of CO2-NaHCO3 equilibrium method. In. experiments employing a stream-lined spindle-shaped float...

1. The deuterium contents of two,bittern samples obtained from Chiaochou Bay in Tsingtao Locality and Kwangchou Bay in Chenkiang Locality were determined by float method. Sp. gr. of Shantung sample is 1.240 (28.0?Be') and that of Kwangtung sample is 1.260 (29.7° Be′). A sample:from Yellow Sea was chosen .as a standard for comparison.All determinations were carried out after normalization of O18 in the sample, by means of CO2-NaHCO3 equilibrium method. In. experiments employing a stream-lined spindle-shaped float and setting the observation region of floating in the middle portion of liquid. column, therefore, a larger range of linear relation between temperature and velocity (rising or falling) of float is obtained, that is, temperature range is±0.33℃ and the velocity range is ±0.26 mm/sec.2.Determined results show that the density of Shantung bittern sample (28°Be′) is 4.208 r higher than that of standard sea water sample, that is, the D content of Shantung bittern is 0.0037 mole % D2O higher than that of the standard (Corresponding to 24.03% of D content of standard sea water sample), the density of K,wangtung bittern sample (29.7°Be′) is 6.250 r higher than that of the standard, that is, the D content of Kwangtung bittern is 0.0058 mole % D2O higher than that of the standard (Corresponding to 37.66% of D content of standard sea water sample). The max. experimental error is ±0.6 7.3.Comparing the determined results of these two samples from Shantung and Kwangtung we can see that the Kwangtung sample is more abundant in heavy water content (through °Be′ of two samples are not entirely the same, the density difference is still apparent). This agrees with the expected results caused by the evaporation difference which is due to the latitudinal difference between the two localities (Chenkiang situated at 21° north latitude and Tsingtao at 36° north latitude).4.The density difference between sample water and standard water shows that after solar evaporation of sea water and salting out of sodium chloride the D content in bittern is concentrated as expected. Thus, highly concentrated bittern may be used as raw material for production of heavy water--a valuable information for the comprehensive utilization of sea water and bittern.

1.我们用浮沉子法测定了胶州湾青岛地区及广州湾湛江地区盐田析盐后苦卤中重水的含量,山东苦卤此重为1.240相当于28.0°Bé,广东苦卤比重为1.260相当于29.7°Bé,并用黄海某区海水作为标准进行此较。所有测定都在用CO_2-NaHCO_3平衡法使氧同位素正常化以后进行的。实验中采用了流 线型梭把式浮沉子,并使浮沉子升降区观察范围设在液柱中部,获得了较大的浮沉子升降速度与温度间直线性关系的范围。温度范围±0.33°C。速度范围±0.26毫米/秒。 2.测定结果表明:山东苦卤(28°Bé)密度较标准海水高出4.208γ相当于0.0037克分子%D_2O,重水含量较标准海水高24.03%。广东苦卤(29.7°Bé)密度较标准海水高出6.250γ,相当于0.0058克分子%D_2O,重水含量较标准海水高37.66%。 3.比较广东与山东二份样品测定结果,可以看出广东苦卤中重水含量有更多富集(虽然二者°Bé不尽相同,但密度差仍旧是显著的)。这与湛江、青岛两地的纬度差异(湛江——北纬21°,青岛——北纬36°)而引起的蒸发差异所应导致的预期结果是一致的。 4.样品水与标准水的密度差证明海水经自然蒸发析出氯化钠以后...

1.我们用浮沉子法测定了胶州湾青岛地区及广州湾湛江地区盐田析盐后苦卤中重水的含量,山东苦卤此重为1.240相当于28.0°Bé,广东苦卤比重为1.260相当于29.7°Bé,并用黄海某区海水作为标准进行此较。所有测定都在用CO_2-NaHCO_3平衡法使氧同位素正常化以后进行的。实验中采用了流 线型梭把式浮沉子,并使浮沉子升降区观察范围设在液柱中部,获得了较大的浮沉子升降速度与温度间直线性关系的范围。温度范围±0.33°C。速度范围±0.26毫米/秒。 2.测定结果表明:山东苦卤(28°Bé)密度较标准海水高出4.208γ相当于0.0037克分子%D_2O,重水含量较标准海水高24.03%。广东苦卤(29.7°Bé)密度较标准海水高出6.250γ,相当于0.0058克分子%D_2O,重水含量较标准海水高37.66%。 3.比较广东与山东二份样品测定结果,可以看出广东苦卤中重水含量有更多富集(虽然二者°Bé不尽相同,但密度差仍旧是显著的)。这与湛江、青岛两地的纬度差异(湛江——北纬21°,青岛——北纬36°)而引起的蒸发差异所应导致的预期结果是一致的。 4.样品水与标准水的密度差证明海水经自然蒸发析出氯化钠以后,重水含量获得了预期的富集效果。高浓度的苦卤可以作为提取浓重水的原料,为海水卤水综合利用提供了有价值的资料。 本文在实验过程中曾?

Qualitative identification of lower acids in water by gas chromatography with a flame ionization detector is reported.A known acid mixture used as standard and acid water samples were directly injected and separated without pre-esterified.Chromatographic separation was carried out on column using 83% dioctyl sebacate(DOS)and 15% sebacic acid(SA)as liquid phase at 150℃,and on column with liquid phase benzylamine adipate(BAA)at 125℃.Three methods of identification were used,namely,identified by the...

Qualitative identification of lower acids in water by gas chromatography with a flame ionization detector is reported.A known acid mixture used as standard and acid water samples were directly injected and separated without pre-esterified.Chromatographic separation was carried out on column using 83% dioctyl sebacate(DOS)and 15% sebacic acid(SA)as liquid phase at 150℃,and on column with liquid phase benzylamine adipate(BAA)at 125℃.Three methods of identification were used,namely,identified by the carbon number rule on DOS+SA column at 150℃,by two-column plot on both DOS+SA and BAA columns at 125℃,and by change of column temperature on DOS+SA column at 150℃ and 125℃.It was found that normal aliphatic acids from acetic to caproic were present in the acid water,and no isomeric acid was detected.

本文报道了石蜡氧化副产物——酸水的直接气相色谱法的定性结果,用作标准的已知试样和酸水试样均未经预处理而直接进样,在癸二酸二辛酯(DOS)+15%癸二酸(SA)柱上(150℃)和已二酸苄胺(BAA)柱上(125℃)进行了色谱分离.采用在DOS+15%SA柱(150℃)上以碳数规律定性,在DOS+15%SA柱(125℃)和BAA柱(125℃)上的双柱定性以及在DOS+15%SA柱(150℃,125℃)上变化柱温定性等三种方法所得结果表明:在稀酸水-[3]试样中,除了正构脂肪酸外,未发现有异构酸存在,还讨论了实测数据与计算值的偏差,酸水中有否其他异构酸的存在和对未知组分的推测等问题。

 
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