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痕量as
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  trace as
     The regression equation of the working curve is ΔA =0.00639 + 0.50728 C As(V)(μg l-1) with a correlation coefficient r=0.9987.The detection limit(LD) is 1.037×10-11 g ml-1.It has been applied to the determine of trace As(Ⅴ) in water and human hair samples with satisfactory results.
     方法的检出限为1.0×10-11 g/mL,回归方程为:ΔA=0.00639+0.5073 C As(V)(μg/L),相关系数r=0.9987.本法成功用于江水、人发中的痕量As(Ⅴ)的测定,结果满意.
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     Trace As(Ⅲ) and As(Ⅴ) in the seawater are determined by using the method of atomic fluorescence spectroscopy.
     应用原子荧光光谱法,测定海水中的痕量As(Ⅲ)和As(Ⅴ)。
短句来源
     Silver diethyldithiocarbamate spectrophotometric determination of trace As~(3+) and As~(5+) with preconcentration by adsorption of nanometer-size TiO_2
     纳米二氧化钛富集-银盐光度法检测痕量As~(3+)和As~(5+)
短句来源
     Trace As(Ⅲ)and As(Ⅴ)was determined by hydride generation non-dispersive atomic fluorescence spectrometry(AFS)in water.
     应用氢化物发生无色散原子荧光法测定水中痕量As(Ⅲ)和As(Ⅴ).
短句来源
     A novel method for the preconcentration of trace As 3+ and As 5+ with nanometer size TiO 2 was described. The arsenic species were detected by silver diethyldithiocarbamate spectrophotometric method after preconcentration.
     为建立测定痕量砷形态的方法 ,研究了纳米二氧化钛对As3 + 和As5+ 的预富集作用以及银盐光度法检测痕量As3 + 和As5+ 。
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  “痕量as”译为未确定词的双语例句
     Study on determination of As, Sb, Bi, Se, Te, Sn in pure nickel by hydride generation inductively coupled plasma Mass spectrometry
     HG-ICP-MS法测定纯镍中痕量As、Sb、Bi、Se、Te、Sn
短句来源
     Simultaneous determination of trace amounts of As, Se and Hg in biological samples by HG-ICP-MS
     HG-ICP-MS同时测定生物样品中痕量As,Se,Hg
短句来源
     The method is based on the competitive reaction of arsenite and 2’, 7’-dichlorofluorescein (DCF) as fluoregenic reagent(λem=510nm,λem:528nm)at pH 6.5~7.5 with iodine(I_2)to cause the increasing fluorescence intensity of the solution. Arsenate and other ions do not react with iodine.
     在pH=6.5~7.5的缓冲介质中,利用2’,7’-二氯荧光素(DCF)作为荧光试剂,激发波长λex=510nm,发射波长λem=528nm下,As(Ⅲ)和DCF竞争碘,引起荧光强度的增强,从而测定痕量As(Ⅲ)。
短句来源
     A new highly sensitive chemiluminescence(CL) method was developed for the determination of As(Ⅲ), based on the CL reaction of MoO_4~(2-)-I~--luminol catalyzed by As(Ⅲ). As(Ⅲ) can be separated from As(Ⅴ)and other ions on the column of the sulfhydryl cotton, then As(Ⅴ) can be changed into As(Ⅲ) by reducing reagent.
     本文在建立的MoO_4~(2-)-I~--As(Ⅲ)-Luminol化学发光体系测定痕量As(Ⅲ)的基础上,利用巯基棉对As(Ⅲ)和As(Ⅴ)完全不同的吸附性能分离As(Ⅲ)和As(Ⅴ),首次建立了痕量价态砷的化学发光分析法,检测限达到4×10~(-10)gAs/ml。
短句来源
     is 14.1 μg/L, the linear range of the determination is 24.0~248 μg/L. The method has been used to determine As? in tap water,urine,serum and synthetic sample with satisfactory results
     该方法的线性范围为 2 4.0~ 2 48μg L ,检出限为 14.1μg L ,方法用于自来水、尿液、血清及合成样中痕量As 的测定 ,均获得满意结果
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  相似匹配句对
     trace analysis;
     痕量分析;
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     DETERMINATION OF TRACE COBALT
     痕量钴的分析
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  trace as
The possibilities of ET-AAS using the graphite furnace or the tungsten coil atomizer were compared by the trace As, Sb and Sn determination in the chloride-containing solution resulting after gold reduction with hydrazine.
      
Although health risk-based As contamination levels are lowered, it is likely that the provenance of trace As concentrations will need to be scrutinized.
      
We present an enhanced error trace as an alternation of fated (forced) and free segments.
      
The studies reviewed also address questions concerning the complexity of the dependency between a moved constituent and its trace as measured by the length of a path vs.
      
If ξ(t)=2√k(1-t), as pointed out by Marshall and Rohde,(12) the behavior of the trace as t approaches 1 depends on the coefficient κ.
      
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The samples are dissolved with HNO3+HCIO4 in a sealed double-walled PTFE vessel by microwave heating. The residual HNO3 is absorbed with MgO placed in the outer wall to prevent its harmful effect in the following reducing process. The procedure has been applied to determine trace arsenic in human hair by hydride generation non-dispersive AFS.

本文用特制的聚四氟乙烯(PTFE)双层消化罐,将发样置于内层,加入HNO_3+HCIO_4作溶剂,微波炉消化试样。外层用MgO作吸收剂,在密闭状态下除去溶样后残余的HNO_3。为氢化物原子荧光法快速测定人发中痕量As提供了一个良好条件。

Trace As(Ⅲ)and As(Ⅴ)was determined by hydride generation non-dispersive atomic fluorescence spectrometry(AFS)in water.An aliquot portion of the sample,adjusted to an acidity of pH5.6-6.0,is treated with KBH4,only As(Ⅲ)forms a gaseous hydride(AsH3).The AsH3 was determined directly by AFS.As(Ⅴ)was not formed AsH3 under the same condition.Another aliquot portion of the sample,reduced As(Ⅴ)with thiourea and ascorbic acid into As(Ⅲ)in 2N HCl,then the total contents of As was determined by the same method.The content...

Trace As(Ⅲ)and As(Ⅴ)was determined by hydride generation non-dispersive atomic fluorescence spectrometry(AFS)in water.An aliquot portion of the sample,adjusted to an acidity of pH5.6-6.0,is treated with KBH4,only As(Ⅲ)forms a gaseous hydride(AsH3).The AsH3 was determined directly by AFS.As(Ⅴ)was not formed AsH3 under the same condition.Another aliquot portion of the sample,reduced As(Ⅴ)with thiourea and ascorbic acid into As(Ⅲ)in 2N HCl,then the total contents of As was determined by the same method.The content of As(Y)is obtained by their difference.The detection limit of this method was 0.1 ppb.Relative standard deviation was 4.6-5.8%,and the recovery was 93-104%.ndition.Another aliquot portion of the sample,reduced As(Ⅴ)with thiourea and ascorbic acid into As(Ⅲ)in 2N HCl,then the total contents of As was determined by the same method.The content of As(Y)is obtained by their difference.The detection limit of this method was 0.1 ppb.Relative standard deviation was 4.6-5.8%,and the recovery

应用氢化物发生无色散原子荧光法测定水中痕量As(Ⅲ)和As(Ⅴ).在pH5.6—6.0时,As(Ⅲ)与KBH_4作用生成气态氢化物(AsH_3),被原子荧光仪测定.在此酸度下,AS(Ⅴ)不发生反应.在2NHCl溶液中,用硫脲和抗坏血酸还原As(Ⅴ)为As(Ⅲ),同法测总砷,用差减法求得As(Ⅴ).方法检出限0.1ppb,相对标准偏差4.6—5.8%,回收率93—104%.

A new highly sensitive chemiluminescence(CL) method was developed for the determination of As(Ⅲ), based on the CL reaction of MoO_4~(2-)-I~--luminol catalyzed by As(Ⅲ).As(Ⅲ) can be separated from As(Ⅴ)and other ions on the column of the sulfhydryl cotton, then As(Ⅴ) can be changed into As(Ⅲ) by reducing reagent. The linear range for the determination of As was 1×10~(-3)~10μg/ml and the detection limit was 4.0×10~(-10)g/ml.

本文在建立的MoO_4~(2-)-I~--As(Ⅲ)-Luminol化学发光体系测定痕量As(Ⅲ)的基础上,利用巯基棉对As(Ⅲ)和As(Ⅴ)完全不同的吸附性能分离As(Ⅲ)和As(Ⅴ),首次建立了痕量价态砷的化学发光分析法,检测限达到4×10~(-10)gAs/ml。分离手续简便,分析速度快。应用于实际水样分析,回收率在97%~107%之间。

 
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