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standard samples
相关语句
  标准样品
    Three columns of μ-Bondagel E-linear was connected in series and used for separation. Sodium dodecyl sulfate (2%) was used as eluent. The α, β and γ components were used as standard samples.
    使用了三根串联的μ-Bondagel E-linear柱,用2%的十二烷基硫酸钠作为淋洗剂,采用α、β和γ三种胶样作为标准样品
短句来源
    It hus a good quantity re producibility, The coefficient of variation was less than ±5% for standard samples and ±10% for environmental samples.
    定量重现性好,对标准样品的变异系数在±5%以内,对环境样品的变异系数为±10%。
短句来源
    The method has been successfully applied to determine yttrium in the rare earth mixtures,Long Nan rare earth oxides and GSD 4,GSD 6,GSD 7 standard samples.
    该法用于测定龙南稀土氧化物、GSD 4、GSD 6、GSD 7等一系列标准样品的钇含量 ,取得了与标准值一致的结果。
短句来源
    The food grade white oil was selected as a blank solvent for making a series of standard samples. Under the selected conditions the contents of benzene and toluene are linearly related to their peak areas in the range of (10~2 000)×10-9(w), respectively, and a detection limit of 5×10-9(w)(S/N=2) is obtained.
    选择以食品用白油为母液制备一系列标准样品 ,在选择的色谱条件下分析 ,苯和甲苯含量分别在10×10-9~2000×10-9(w)间与峰面积呈现良好的线性关系 ,检出限(S/N=2)为5×10-9(w)。
短句来源
    The RSD is less than 6% for the analytical range of 0 001%-0 02%,and is less than 3% for the analytical range of 0 02%-0 3%. The determined values of standard samples are in good agreement with certified values.
    经试验验证该法简便快速 ,精密度准确度高 ,含量在 0 0 0 1%~ 0 0 0 2 %之间RSD <6 % ,0 0 2 %~ 0 3%之间RSD <3% ,标准样品的测定值与准确值吻合较好 ,结果令人满意。
短句来源
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  标样
    X-RAY FLUORESCENCE ANALYSIS OF MULTICOMPONENT ALLOYS WITHOUT USING STANDARD SAMPLES
    多元合金的无标样能量色散X射线荧光分析
短句来源
    Determination of Pb and Cu and Sn in Ancient Bronze Coins Using X-ray Fluorescence Simulant Standard Samples Method
    X射线荧光光谱模拟标样法测定古代青铜钱币中的铅铜锡
短句来源
    Calculation of Quantitative Phase Analysis by X-Ray Diffraction Without Standard Samples
    无标样XRD定量相分析的计算
短句来源
    Method of Extended Quantitative Phase Analysis Without Standard Samples by Microcomputer
    扩展的无标样定量相分析的微机处理方法
短句来源
    The analytical method determining the content of PdO和La2O3 in Al2O3 with x-ray fluorescence spectrometry is developed,using artificial synthesis standard samples prepared by ultrasonic wave disperse,powder pressed method to prepare samples and empirical coefficient method combined with scatter line as internal to correct the matrix effect.
    用X荧光光谱法准确测定氧化铝中PdO和La2O3的含量,采用超声波分散人工合成标样,粉末压片法制样,经验系数法与散射线内标法校正基体效应.
短句来源
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  标准样
    In comparison with the inverse matrix method, its advantagelies is in the fact that no standard samples of pure U, Ra, Th and K are needed for obtaining reaponse coefficients.
    和逆矩阵相比,其优点是不需要用纯U、Ra、Th和K标准样来求解响应系数。
短句来源
    The IR spectrum of the newly synthesized Hgs and the result of the XRD test are consistent with the standard samples of IR and XDR spectrums.
    新合成的HgS的IR谱,XRD测试结果与标准样的完全一致。
短句来源
    Results from determination of copper in minerals were in agreement with the data of standard samples and those obtained by the oscillographic polarographic method.
    测定结果与标准样的数据吻合,与示波极谱的数据一致。
短句来源
    Results obtained with several standard samples are satisfactory.
    对几种标准样进行测定,结果满意。
短句来源
    Study is made of Ta lining in the graphite tube for analysis of GSD standard samples by atomic absorption. Results show that thismethod can be used to determinate trace rare earths with high sensitivity,accurate results and long service life of Ta sheet.
    研究了在石墨管中衬钽金属的方法并用于原子吸收分析GSD化探标准样,结果表明该法测量微量稀土灵敏度高、结果准确、钽片使用寿命长。
短句来源
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  “standard samples”译为未确定词的双语例句
    Comparing with the standard samples bought from of America Indofinechemical Company, and testing by standard addition method of HPLC, two monomers were approved as orientin (8-C-glucosyl-luteotin) and isoorientin (6-C-glucosyl-luteolin), individually.
    经与美国Indofinechemical公司的HPLC级标准品对照,证实分别是荭草苷(8-C-葡萄糖-木犀草素)和异荭草苷(6-C-葡萄糖-木犀草素)。
短句来源
    Analyses of rock reference standard samples of various uranium contents (0.95, 84.8, 669 and 7240 ppm) by the present method were given with relative standard deviation<5%.
    本法对不同含量铀(0.95,84.8,669和7240ppm)的岩石标准参考样品进行分析,其RSD均小于±5%。
短句来源
    The main components of these oils are 3-C15 and 3-C17 alkylcatechols, respectively, which were identified by their standard samples.
    其主要成分为3-C_(15)和C_(17)烃基取代的邻苯二酚化合物,其中三烯漆酚和单烯虫漆酚含量最高。
短句来源
    The molar absorptivity of the complex is 1.06×10~5 L·mol~(-1)·cm~(-1). Beer's law is obeyed for oxide of Se in the range of 0~40μg/25ml. The method is rapid, sensitive and has been used for the determination of standard samples with satisfactory results.
    其表观摩尔吸光系数为1.06×10~5L·mol~(-1)·cm~(-1),钪氧化物含量在0—40μg范围内符合比尔定律,是一种较有特色的测钪方法。
短句来源
    The relative errors are less than 4. 0% for standard samples in either way.
    微量标准样测定的相对误差均不大于4.0%。
短句来源
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  standard samples
A method is developed for the separate determination of aluminum and beryllium using cellulose as the support; the method was used for the analysis of real samples and tested with standard samples.
      
IUPAC Recommendations for Reference Standard Samples in pH Measurements
      
Designing of Standard Samples for Determining the Sensitivity of Eddy-Current Devices to the Metal Inclusion Content in a Parama
      
The reasons of the wide propagation and the high effectiveness of using standard samples of magnetically soft materials are explained.
      
A numerical analysis of these errors is performed using standard samples as examples.
      
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A rapid method for the determination of CaO and MgO in Hematite is proposed. The sample sintered with a mixture of Na2CO3 and K.2CO3 and boiled in 2N HNO3 to dissolve the Lime and Magnesia. The extract is treated with urea to precipitate the small amount of Iron dissolved. The sum of CaO and MgO is determined by titration with ethylenediamine tetracetic acid (disodium salt). Lime is determined after precipitation as the oxalate and MgO is found by difference. Or alternatively, Magnesia is determined colorimetrically...

A rapid method for the determination of CaO and MgO in Hematite is proposed. The sample sintered with a mixture of Na2CO3 and K.2CO3 and boiled in 2N HNO3 to dissolve the Lime and Magnesia. The extract is treated with urea to precipitate the small amount of Iron dissolved. The sum of CaO and MgO is determined by titration with ethylenediamine tetracetic acid (disodium salt). Lime is determined after precipitation as the oxalate and MgO is found by difference. Or alternatively, Magnesia is determined colorimetrically with titan yellow and Lime by difference. The results of both methods agree each other. The colorimetric method is more rapid, and requires about 3-4 hours. Analysis of standard sample of hematite give very good results.

提供一个快速测定赤铁矿中CaO和MgO的新方法,在用碳酸钠和碳酸钾混合熔剂半融熔后,在2N硝酸中煮沸1.5小时以抽取钙、镁,分出不溶的Fe_2O_3和溶解的少量铁、铝等以后用0.01M EDTA标准溶液滴定CaO、MgO总量。用草酸盐分离钙,用EDTA溶液滴定CaO含量,另用地旦黄比色法测定MgO分量。两个方法测定结果相符合,比色法较快,完成一个试样分析只需3—4小时。用本法(容量法测定CaO)分析苏联标准铁矿试样,结果完全符合。

The cathodic voltammetric characteristics of copper with linearly changing tension at the glassy carbon electrode in NH_3-NH_4Cl were studied in detail. The electrode reaction, peak tension, reversibility, peak current and temperature coefficient were investigated. Experimental results showed that the reduction of cuprammine complex cation was proceeded stepwisely at the glassy carbon electrode. Cu(NH_3)_4~(2+) was first reduced reversibly to Cu (NH_3)_2~+, then to Cu irreversibly.In 2.5M NH_3-0.75M NH_4Cl,...

The cathodic voltammetric characteristics of copper with linearly changing tension at the glassy carbon electrode in NH_3-NH_4Cl were studied in detail. The electrode reaction, peak tension, reversibility, peak current and temperature coefficient were investigated. Experimental results showed that the reduction of cuprammine complex cation was proceeded stepwisely at the glassy carbon electrode. Cu(NH_3)_4~(2+) was first reduced reversibly to Cu (NH_3)_2~+, then to Cu irreversibly.In 2.5M NH_3-0.75M NH_4Cl, the experimental peak tension of the first wave was-0.28V (vs. S. C. E.) in close agreement with the value calculated from the theoretical equation. Experimental peak currents showed linear relationships with both the concentration of copper and the square root of the rate of tension change, obeying the Randles-(?)evěik equation. The temperature coefficient of the peak current was about + 1.3%/℃.The roduction of Cu(NH_3)_2~+ had a higher ovortension. The experimental peak tension of the second wave varied from -0.69~-0.84V (vs. S. C. E.) as the rate of tension change increased from 1.04~100 mV/s. Experimental peak currents were proportional to the concentration of copper in a narrower range.When the first wave of the reduction of copper at the glassy carbon electrode was applied to copper determination, the interference of some ions could be avoided, such as Tl~+, which interfered with copper in polarographic analysis using a dropping mercury electrode. Results from determination of copper in minerals were in agreement with the data of standard samples and those obtained by the oscillographic polarographic method. The relative standard error of this method is less than±3.2%.

本文研究了NH_3-NH_4Cl溶液中铜在稳定玻璃碳电极上的线性变势阴极伏安特性。确定铜氨络离子在玻璃碳电极上的还原分两步进行。在2.5MNH_3-0.75MNH_4Cl中,第一个波是Cu(NH_3)_4~(2+)可逆地还原到Cu(NH_3)_2~+,其峰电势为-0.28伏,与理论值一致。峰电流与电势变化速度及浓度的关系符合Randles-evcik方程。第二个波是Cu(NH_3)_2~+不可逆地还原为铜,当电势变化速度改变时,其峰电势在-0.69~-0.84伏之间。第一个波峰电流的相对标准误差不大于±2.4%,温度系数约为+1.3%/度。本文在氨性底液中用铜在玻璃碳电极上还原的第一个波以测定铜矿中的铜。在极谱法中用的第二个波有[Co(NH_3)_6]~(3+)前波及Tl~+重波,它们在第一个波中均变为后波,从而克服了它们对铜测定的干扰。测定结果与标准样的数据吻合,与示波极谱的数据一致。测定矿样的相对标准误差在±0.37~3.2%之间,符合矿石分析的要求。

This paper reports that the micro amount of guanine and adenine in DNA can be determined simultaneously by anodic differential pulse voltam-metric method and so a rapid determination of G + C/A + T value of DNA is established. The sensitivity of this method is about 100 times higher than the ultra-violet adsorption method, in which the purines are seperated by paper chromotography. The time required for once determination is only11/2hr.We use the DNA of calfthmos as the standard sample in the experiment...

This paper reports that the micro amount of guanine and adenine in DNA can be determined simultaneously by anodic differential pulse voltam-metric method and so a rapid determination of G + C/A + T value of DNA is established. The sensitivity of this method is about 100 times higher than the ultra-violet adsorption method, in which the purines are seperated by paper chromotography. The time required for once determination is only11/2hr.We use the DNA of calfthmos as the standard sample in the experiment and the result shows that this method is accurate. The G + C/A + T values of six sorts of DNA of E. coli, heliothis armigera and so on are determined.

本文采用阳极差分脉冲伏安法同时测定微量DNA水解碱基鸟嘌呤和腺嘌呤的含量,从而建立了一种能对微量DNA进行快速测定G+C/A+T值的方法。本方法比层析分离后紫外吸收法灵敏度约高二个数量级,测定时间缩短到一小时半左右。经用德国小牛胸腺标准DNA进行实验,证明本方法准确可靠;并测定了大肠杆菌、棉铃虫等六种DNA的G+C/A+T值。

 
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